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[vysledek_id] => 108624
[vysledek_druh_id] => CONPA
[ex_vysledek_id] => 109836
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[nazev] => Biomechanical testing of spinal segment fixed by ArcoFix system
[nazev_orig] => Biomechanical testing of spinal segment fixed by ArcoFix system
[duvernost_udaju_id] => S
[popis] => The aim of this study was to compare the mechanical properties of the spinal segment in the intact state, destabilized (injury) state and the state after fixation by implant ArcoFix. The problem was solved by using the experimental modelling ZWICK testing machine. The study was based on in vitro biomechanical testing. Ten test samples were prepared for the experiment. Mechanical properties were described by the value of force couple needed to twist the specimen during the applied tensile force. Statistical analysis of measured results confirmed the hypothesis of different behavior of the states of intact, injured and fixed samples. Analysis did not confirm different mechanical behavior of intact and fixated specimens when comparing by the couple moment.
[popis_orig] => The aim of this study was to compare the mechanical properties of the spinal segment in the intact state, destabilized (injury) state and the state after fixation by implant ArcoFix. The problem was solved by using the experimental modelling ZWICK testing machine. The study was based on in vitro biomechanical testing. Ten test samples were prepared for the experiment. Mechanical properties were described by the value of force couple needed to twist the specimen during the applied tensile force. Statistical analysis of measured results confirmed the hypothesis of different behavior of the states of intact, injured and fixed samples. Analysis did not confirm different mechanical behavior of intact and fixated specimens when comparing by the couple moment.
[klicova_slova] => ArcoFix, Spine stabilization, Lateral stabilization, Biomechanics
[klicova_slova_orig] => ArcoFix, Spine stabilization, Lateral stabilization, Biomechanics
[url] =>
[oecd_obor_id] => 20301
[odpovedny_utvar_id] => 20928
[odpovedny_utvar_nazev] => NCC MESTEC - Division of Solid Mechanics and Mechatronics
[odpovedny_utvar_zkratka] => NCC MESTEC - DSM
[nadrazena_soucast_id] => 4
[nadrazena_soucast_zkratka] => FME
[nadrazena_soucast_nazev] => Faculty of Mechanical Engineering
[originalni_jazyk] => en
[schvalil_id] => 15110
[schvaleno] => 2016-04-15
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[vycet_osob] => NÁVRAT, T.; FLORIAN, Z.; KOČIŠ, J.; VOSYNEK, P.
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[vlozil] => Informační systém Automat
[upravil] => Informační systém Automat
[ins_uid] => 999999
[upd_uid] => 999999
[ins_ts] => 2025-09-22
[upd_ts] => 2025-09-22
[status] => 9
[identifikator] => ISBN 978-80-214-4871-1
[identifikator_popis] => ISBN - ENGINEERING MECHANICS 2014
[riv_dodavka_id] =>
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[citace_text] => NÁVRAT, T.; FLORIAN, Z.; KOČIŠ, J.; VOSYNEK, P. Biomechanical testing of spinal segment fixed by ArcoFix system. In ENGINEERING MECHANICS 2014. Brno: BUT, 2014. p. 424-427. ISBN: 978-80-214-4871-1.
[citace_html] => NÁVRAT, T.; FLORIAN, Z.; KOČIŠ, J.; VOSYNEK, P. Biomechanical testing of spinal segment fixed by ArcoFix system. In ENGINEERING MECHANICS 2014. Brno: BUT, 2014. p. 424-427. ISBN: 978-80-214-4871-1.
[citace_rtf] =>
[citace_bibtex] => @inproceedings{BUT108624,
author="Tomáš {Návrat} and Zdeněk {Florian} and Ján {Kočiš} and Petr {Vosynek}",
title="Biomechanical testing of spinal segment fixed by ArcoFix system",
booktitle="ENGINEERING MECHANICS 2014",
year="2014",
number="1",
pages="424--427",
publisher="BUT",
address="Brno",
isbn="978-80-214-4871-1"
}
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[nazev_en] => Biomechanical testing of spinal segment fixed by ArcoFix system
[popis_en] => The aim of this study was to compare the mechanical properties of the spinal segment in the intact state, destabilized (injury) state and the state after fixation by implant ArcoFix. The problem was solved by using the experimental modelling ZWICK testing machine. The study was based on in vitro biomechanical testing. Ten test samples were prepared for the experiment. Mechanical properties were described by the value of force couple needed to twist the specimen during the applied tensile force. Statistical analysis of measured results confirmed the hypothesis of different behavior of the states of intact, injured and fixed samples. Analysis did not confirm different mechanical behavior of intact and fixated specimens when comparing by the couple moment.
[klicova_slova_en] => ArcoFix, Spine stabilization, Lateral stabilization, Biomechanics
[vysledek_datum] => 2014-05-12T00:00:00+02:00
)
[1] => Array
(
[vysledek_id] => 108745
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[nazev] => Výpočtové modelování dynamické odezvy kostry točivého elektrického stroje na působení magnetických sil
[nazev_orig] => Výpočtové modelování dynamické odezvy kostry točivého elektrického stroje na působení magnetických sil
[duvernost_udaju_id] => S
[popis] => Článek se zabývá výpočtovým modelováním dynamické odezvy statoru točivého elektrického stroje na působení magnetických sil. Výpočet dynamické odezvy je proveden metodou konečných prvků. Z vypočítané dynamické odezvy je vyhodnocována hladina akustického výkonu vyzářeného vnějším povrchem statoru. Navržený výpočtový model je použit ke zkoumání vlivu nesymetrie vzduchové mezery na akustický výkon stroje. Získané výsledky potvrzují, že zvýšení nesymetrie vzduchové mezery vede ke zvýšení akustického výkonu.
[popis_orig] => Článek se zabývá výpočtovým modelováním dynamické odezvy statoru točivého elektrického stroje na působení magnetických sil. Výpočet dynamické odezvy je proveden metodou konečných prvků. Z vypočítané dynamické odezvy je vyhodnocována hladina akustického výkonu vyzářeného vnějším povrchem statoru. Navržený výpočtový model je použit ke zkoumání vlivu nesymetrie vzduchové mezery na akustický výkon stroje. Získané výsledky potvrzují, že zvýšení nesymetrie vzduchové mezery vede ke zvýšení akustického výkonu.
[klicova_slova] => akustický výkon,magnetická síla, rotor, stator, točivý elektrický stroj
[klicova_slova_orig] => akustický výkon,magnetická síla, rotor, stator, točivý elektrický stroj
[url] =>
[oecd_obor_id] => 20301
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[vycet_osob] => DONÁT, M.
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[druh_popis] => Paper in proceedings (conference paper)
[stav] => Approved
[vysledek_kategorie_id] => PV
[vysledek_system_kategorie_id] => PU
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[upravil] => Informační systém Automat
[ins_uid] => 999999
[upd_uid] => 999999
[ins_ts] => 2025-09-22
[upd_ts] => 2025-09-22
[status] => 9
[identifikator] => ISBN 978-80-227-3946-7
[identifikator_popis] => ISBN - Noise and Vibration in practise
[riv_dodavka_id] => 1461
[riv_dodavka_oznaceni] => RIV18-TA0-26510___
[riv_dodavka_rok] => 2017
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[citace_text] => DONÁT, M. Výpočtové modelování dynamické odezvy kostry točivého elektrického stroje na působení magnetických sil. In Noise and Vibration in practise. Kočovce: 2013. s. 41-46. ISBN: 978-80-227-3946-7.
[citace_html] => DONÁT, M. Výpočtové modelování dynamické odezvy kostry točivého elektrického stroje na působení magnetických sil. In Noise and Vibration in practise. Kočovce: 2013. s. 41-46. ISBN: 978-80-227-3946-7.
[citace_rtf] =>
[citace_bibtex] => @inproceedings{BUT108745,
author="Martin {Donát}",
title="Výpočtové modelování dynamické odezvy kostry točivého elektrického stroje na působení magnetických sil",
booktitle="Noise and Vibration in practise",
year="2013",
pages="41--46",
address="Kočovce",
isbn="978-80-227-3946-7"
}
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[poznamka_metriky] =>
[nazev_en] => Computational modeling of the dynamic response of the frame of the rotating electrical ma-chine excited by electromagnetic forces
[popis_en] => This article presents a method of calculating of the dynamic response of the frame of the rotating electrical machine excited by electromagnetic forces, which act on the stator winding. This method is based on finite element method. The sound power level was obtained from dynamic response of the rotating electrical machine frame. The proposed method was used to investigate the influence of the air gap eccentricity on the radiated sound power level. Obtained results show that the increase of air gap asymmetry leads to increase of the radiated sound power level.
[klicova_slova_en] => sound power, magnetic force, rotor, stator, rotating electrical machine
[vysledek_datum] => 2013-06-03T00:00:00+02:00
)
[2] => Array
(
[vysledek_id] => 108747
[vysledek_druh_id] => CONPA
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[nazev] => Vliv nevývahy rotorového svazku na vibrace a hluk asynchronního generátoru
[nazev_orig] => Vliv nevývahy rotorového svazku na vibrace a hluk asynchronního generátoru
[duvernost_udaju_id] => S
[popis] => Článek se zabývá výpočtovým modelováním dynamické odezvy točivého elektrického stroje na působení magnetických sil. Je navržen výpočtový model, který uvažuje vzájemnou elektro-mechanickou interakci mezi statorem a rotorem stroje. Získané výsledky ukazaly, že magnetické síly působící na statorový svazek stroje vybudí významné torzní vibrace statoru stroje. Příčinou tohoto chování je malý rozdíl mezi vlastní frekvencí torzního kmitání statoru a jedné významné harmonické složky magnetických sil působících na statorový svazek.
[popis_orig] => Článek se zabývá výpočtovým modelováním dynamické odezvy točivého elektrického stroje na působení magnetických sil. Je navržen výpočtový model, který uvažuje vzájemnou elektro-mechanickou interakci mezi statorem a rotorem stroje. Získané výsledky ukazaly, že magnetické síly působící na statorový svazek stroje vybudí významné torzní vibrace statoru stroje. Příčinou tohoto chování je malý rozdíl mezi vlastní frekvencí torzního kmitání statoru a jedné významné harmonické složky magnetických sil působících na statorový svazek.
[klicova_slova] => akustický výkon, magnetická síla, rotor, stator, točivý elektrický stroj
[klicova_slova_orig] => akustický výkon, magnetická síla, rotor, stator, točivý elektrický stroj
[url] =>
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[schvaleno] => 2016-04-15
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[vysledek_stav_id] => 3
[vlozil] => Informační systém Automat
[upravil] => Informační systém Automat
[ins_uid] => 999999
[upd_uid] => 999999
[ins_ts] => 2025-09-22
[upd_ts] => 2025-09-22
[status] => 9
[identifikator] => ISBN 978-80-227-4173-6
[identifikator_popis] => ISBN - Noise and Vibration in Practise
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[riv_dodavka_oznaceni] => RIV18-TA0-26510___
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[citace_text] => DONÁT, M. Vliv nevývahy rotorového svazku na vibrace a hluk asynchronního generátoru. In Noise and Vibration in Practise. Kočovce: 2014. s. 41-46. ISBN: 978-80-227-4173-6.
[citace_html] => DONÁT, M. Vliv nevývahy rotorového svazku na vibrace a hluk asynchronního generátoru. In Noise and Vibration in Practise. Kočovce: 2014. s. 41-46. ISBN: 978-80-227-4173-6.
[citace_rtf] =>
[citace_bibtex] => @inproceedings{BUT108747,
author="Martin {Donát}",
title="Vliv nevývahy rotorového svazku na vibrace a hluk asynchronního generátoru",
booktitle="Noise and Vibration in Practise",
year="2014",
pages="41--46",
address="Kočovce",
isbn="978-80-227-4173-6"
}
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[poznamka_metriky] =>
[nazev_en] => The unbalance of the rotor pack and its effects on vibration and noise of the asynchronous generator.
[popis_en] => This article deals with computational modelling of the dynamic response of the rotating electrical machine on the application of the magnetic forces. The computational model, which takes into ac-count the interaction between stator and the rotor, was designed. Obtained results show that the magnetic forces excited the significant torsional vibration of the stator, because the fervency of the torsional eigen mode is too close to the second harmonic. The unbalanced magnetic pull, arising as a result of the asymmetry of air gap, does not have sufficient energy to affect the vibration of the stator.
[klicova_slova_en] => sound power, magnetic force, rotor, stator, rotating electrical machine
[vysledek_datum] => 2014-06-02T00:00:00+02:00
)
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(
[vysledek_id] => 108846
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[nazev] => Hardware-In-the-Loop simulator for turboprop and turboshaft engine control units
[nazev_orig] => Hardware-In-the-Loop simulator for turboprop and turboshaft engine control units
[duvernost_udaju_id] => S
[popis] => This paper presents the development and implementation of the Hardware-In-the-Loop (HIL) Simulator for turbo-prop and turbo-shaft engine control units (ECUs) on a low-cost embedded microcontroller. Developed HIL Simulator is a subsystem of a complex test device TPR_CPSP_SIM designed for use in the development and also in the manufacturing process of the ECUs.
In this document, we describe the development process of the part of the HIL simulator, which runs the engine simulation model and provides selected signals for the tested control unit. Main goal for this project was to implement turbo-prop and turbo-shaft engine (gas turbines) TP100 and TS100 models into the microcontroller and setup the peripherals for the interaction with the rest of the system to obtain reliable HIL simulation platform.
[popis_orig] => This paper presents the development and implementation of the Hardware-In-the-Loop (HIL) Simulator for turbo-prop and turbo-shaft engine control units (ECUs) on a low-cost embedded microcontroller. Developed HIL Simulator is a subsystem of a complex test device TPR_CPSP_SIM designed for use in the development and also in the manufacturing process of the ECUs.
In this document, we describe the development process of the part of the HIL simulator, which runs the engine simulation model and provides selected signals for the tested control unit. Main goal for this project was to implement turbo-prop and turbo-shaft engine (gas turbines) TP100 and TS100 models into the microcontroller and setup the peripherals for the interaction with the rest of the system to obtain reliable HIL simulation platform.
[klicova_slova] => Hardware-In-the-Loop Simulation; Engine Control Unit; ECU; CAN Aerospace; Rapid Code Generatio
[klicova_slova_orig] => Hardware-In-the-Loop Simulation; Engine Control Unit; ECU; CAN Aerospace; Rapid Code Generatio
[url] => http://www.europment.org/library/2014/prague/ECS-EET.pdf
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[identifikator] => ISBN 978-1-61804-231-6
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Proceedings of the 2014 International Conference on Electronics and Communication Systems II (ECS '14)
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[citace_text] => VEJLUPEK, J.; JASANSKÝ, M.; LAMBERSKÝ, V.; GREPL, R. Hardware-In-the-Loop simulator for turboprop and turboshaft engine control units. In COMMUNICATIONS, CIRCUITS and EDUCATIONAL TECHNOLOGIES Proceedings of the 2014 International Conference on Electronics and Communication Systems II (ECS '14). Prague, Czech Republic: europment, 2014. p. 52-57. ISBN: 978-1-61804-231-6.
[citace_html] => VEJLUPEK, J.; JASANSKÝ, M.; LAMBERSKÝ, V.; GREPL, R. Hardware-In-the-Loop simulator for turboprop and turboshaft engine control units. In COMMUNICATIONS, CIRCUITS and EDUCATIONAL TECHNOLOGIES Proceedings of the 2014 International Conference on Electronics and Communication Systems II (ECS '14). Prague, Czech Republic: europment, 2014. p. 52-57. ISBN: 978-1-61804-231-6.
[citace_rtf] =>
[citace_bibtex] => @inproceedings{BUT108846,
author="Josef {Vejlupek} and Michal {Jasanský} and Vojtěch {Lamberský} and Robert {Grepl}",
title="Hardware-In-the-Loop simulator for turboprop and turboshaft engine control units",
booktitle="COMMUNICATIONS, CIRCUITS and EDUCATIONAL TECHNOLOGIES
Proceedings of the 2014 International Conference on Electronics and Communication Systems II (ECS '14)",
year="2014",
pages="52--57",
publisher="europment",
address="Prague, Czech Republic",
isbn="978-1-61804-231-6",
url="http://www.europment.org/library/2014/prague/ECS-EET.pdf"
}
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[nazev_en] => Hardware-In-the-Loop simulator for turboprop and turboshaft engine control units
[popis_en] => This paper presents the development and implementation of the Hardware-In-the-Loop (HIL) Simulator for turbo-prop and turbo-shaft engine control units (ECUs) on a low-cost embedded microcontroller. Developed HIL Simulator is a subsystem of a complex test device TPR_CPSP_SIM designed for use in the development and also in the manufacturing process of the ECUs.
In this document, we describe the development process of the part of the HIL simulator, which runs the engine simulation model and provides selected signals for the tested control unit. Main goal for this project was to implement turbo-prop and turbo-shaft engine (gas turbines) TP100 and TS100 models into the microcontroller and setup the peripherals for the interaction with the rest of the system to obtain reliable HIL simulation platform.
[klicova_slova_en] => Hardware-In-the-Loop Simulation; Engine Control Unit; ECU; CAN Aerospace; Rapid Code Generatio
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[nazev] => Influence of the V-notch opening angle on critical applied force values Influence of the V-notch opening angle on critical applied force values for the crack initiation from the sharp V-notch
[nazev_orig] => Influence of the V-notch opening angle on critical applied force values Influence of the V-notch opening angle on critical applied force values for the crack initiation from the sharp V-notch
[duvernost_udaju_id] => S
[popis] => The aim of this paper is to estimate a value of the critical applied force for a crack initiation from the sharp V-notch tip. The classical approach of the linear elastic fracture mechanics (LELM) was generalized, because the stress singularity exponent differs from 0.5 in studied case. The value of the stress singularity exponent depends on the V-notch opening angle. The finite element method was used for a determination of stress distribution in the vicinity of the sharp V-notch tip and for the estimation of the generalized stress intensity factor depending on the V-notch opening angle. Critical value of generalized stress intensity factor was obtained by using stability criterion based on the tangential stress component averaged over a critical distance d from the V-notch tip. Calculated values of the critical applied force were compared with experimental data taken from the literature.
[popis_orig] => The aim of this paper is to estimate a value of the critical applied force for a crack initiation from the sharp V-notch tip. The classical approach of the linear elastic fracture mechanics (LELM) was generalized, because the stress singularity exponent differs from 0.5 in studied case. The value of the stress singularity exponent depends on the V-notch opening angle. The finite element method was used for a determination of stress distribution in the vicinity of the sharp V-notch tip and for the estimation of the generalized stress intensity factor depending on the V-notch opening angle. Critical value of generalized stress intensity factor was obtained by using stability criterion based on the tangential stress component averaged over a critical distance d from the V-notch tip. Calculated values of the critical applied force were compared with experimental data taken from the literature.
[klicova_slova] => Sharp V-notch, crack initiation, stress singularity, generalized stress intensity factor.
[klicova_slova_orig] => Sharp V-notch, crack initiation, stress singularity, generalized stress intensity factor.
[url] =>
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[citace_text] => ŠTEGNEROVÁ, K.; NÁHLÍK, L.; HUTAŘ, P. Influence of the V-notch opening angle on critical applied force values Influence of the V-notch opening angle on critical applied force values for the crack initiation from the sharp V-notch. Key Engineering Materials (print), 2015, vol. 627, no. 2015, p. 165-168. ISSN: 1013-9826.
[citace_html] => ŠTEGNEROVÁ, K.; NÁHLÍK, L.; HUTAŘ, P. Influence of the V-notch opening angle on critical applied force values Influence of the V-notch opening angle on critical applied force values for the crack initiation from the sharp V-notch. Key Engineering Materials (print), 2015, vol. 627, no. 2015, p. 165-168. ISSN: 1013-9826.
[citace_rtf] =>
[citace_bibtex] => @article{BUT108864,
author="Kateřina {Štegnerová} and Luboš {Náhlík} and Pavel {Hutař}",
title="Influence of the V-notch opening angle on critical applied force values Influence of the V-notch opening angle on critical applied force values for the crack initiation from the sharp V-notch",
journal="Key Engineering Materials (print)",
year="2015",
volume="627",
number="2015",
pages="165--168",
doi="10.4028/www.scientific.net/KEM.627.165",
issn="1013-9826"
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[nazev_en] => Influence of the V-notch opening angle on critical applied force values Influence of the V-notch opening angle on critical applied force values for the crack initiation from the sharp V-notch
[popis_en] => The aim of this paper is to estimate a value of the critical applied force for a crack initiation from the sharp V-notch tip. The classical approach of the linear elastic fracture mechanics (LELM) was generalized, because the stress singularity exponent differs from 0.5 in studied case. The value of the stress singularity exponent depends on the V-notch opening angle. The finite element method was used for a determination of stress distribution in the vicinity of the sharp V-notch tip and for the estimation of the generalized stress intensity factor depending on the V-notch opening angle. Critical value of generalized stress intensity factor was obtained by using stability criterion based on the tangential stress component averaged over a critical distance d from the V-notch tip. Calculated values of the critical applied force were compared with experimental data taken from the literature.
[klicova_slova_en] => Sharp V-notch, crack initiation, stress singularity, generalized stress intensity factor.
[vysledek_datum] => 2015-01-30T00:00:00+01:00
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[nazev] => Review of Pressurized Vessel Structural Design – An Assessment of Total Life
[nazev_orig] => Review of Pressurized Vessel Structural Design – An Assessment of Total Life
[duvernost_udaju_id] => S
[popis] => The paper discusses life prediction of pressurized cylindrical container because of its dangerous failure during usage. The fatigue of material and crack propagation were obvious from the fracture surface. Crack initiation was located in the notch root of the thread. Our goal was to review the vessel structural design based on its technical documentation. Two approaches for estimating the crack initiation period were used. As input parameters, stress strain relations in the notch were obtained from FEM analysis, done in ANSYS Workbench. The first approach makes use of Neubers rule based on elastic-plastic shakedown and cyclic stressstrain curve. The second concept (which is described in ČSN EN 13445-3 or AD 2000 Mekblatt S2 respectively) uses elastic shakedown. Included stress-life curves leads to the number of cycles to crack initiation.
Finally the subcritical crack growth period and final fracture were estimated = the total life was evaluated.
[popis_orig] => The paper discusses life prediction of pressurized cylindrical container because of its dangerous failure during usage. The fatigue of material and crack propagation were obvious from the fracture surface. Crack initiation was located in the notch root of the thread. Our goal was to review the vessel structural design based on its technical documentation. Two approaches for estimating the crack initiation period were used. As input parameters, stress strain relations in the notch were obtained from FEM analysis, done in ANSYS Workbench. The first approach makes use of Neubers rule based on elastic-plastic shakedown and cyclic stressstrain curve. The second concept (which is described in ČSN EN 13445-3 or AD 2000 Mekblatt S2 respectively) uses elastic shakedown. Included stress-life curves leads to the number of cycles to crack initiation.
Finally the subcritical crack growth period and final fracture were estimated = the total life was evaluated.
[klicova_slova] => pressurized vessel, total life, fatigue, fracture
[klicova_slova_orig] => pressurized vessel, total life, fatigue, fracture
[url] => https://www.scientific.net/AMM.624.218
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[originalni_jazyk] => en
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[schvaleno] => 2021-10-01
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[vycet_osob] => VOSYNEK, P.; VLK, M.; NÁVRAT, T.
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[identifikator] => ISBN 9783038352259 ISSN 1660-9336
[identifikator_popis] => ISBN - Advanced Development in Automation, Materials and Manufacturing ISSN - Applied Mechanics and Materials (CH)
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[citace_text] => VOSYNEK, P.; VLK, M.; NÁVRAT, T. Review of Pressurized Vessel Structural Design – An Assessment of Total Life. In Advanced Development in Automation, Materials and Manufacturing. Applied Mechanics and Materials. Trans Tech Publications, 2014. no. 218, p. 218-222. ISBN: 9783038352259. ISSN: 1660-9336.
[citace_html] => VOSYNEK, P.; VLK, M.; NÁVRAT, T. Review of Pressurized Vessel Structural Design – An Assessment of Total Life. In Advanced Development in Automation, Materials and Manufacturing. Applied Mechanics and Materials. Trans Tech Publications, 2014. no. 218, p. 218-222. ISBN: 9783038352259. ISSN: 1660-9336.
[citace_rtf] =>
[citace_bibtex] => @inproceedings{BUT108883,
author="Petr {Vosynek} and Miloš {Vlk} and Tomáš {Návrat}",
title="Review of Pressurized Vessel Structural Design – An Assessment of Total Life",
booktitle="Advanced Development in Automation, Materials and Manufacturing",
year="2014",
journal="Applied Mechanics and Materials",
volume="624",
number="218",
pages="218--222",
publisher="Trans Tech Publications",
doi="10.4028/www.scientific.net/AMM.624.218",
isbn="9783038352259",
issn="1660-9336",
url="https://www.scientific.net/AMM.624.218"
}
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[nazev_en] => Review of Pressurized Vessel Structural Design – An Assessment of Total Life
[popis_en] => The paper discusses life prediction of pressurized cylindrical container because of its dangerous failure during usage. The fatigue of material and crack propagation were obvious from the fracture surface. Crack initiation was located in the notch root of the thread. Our goal was to review the vessel structural design based on its technical documentation. Two approaches for estimating the crack initiation period were used. As input parameters, stress strain relations in the notch were obtained from FEM analysis, done in ANSYS Workbench. The first approach makes use of Neubers rule based on elastic-plastic shakedown and cyclic stressstrain curve. The second concept (which is described in ČSN EN 13445-3 or AD 2000 Mekblatt S2 respectively) uses elastic shakedown. Included stress-life curves leads to the number of cycles to crack initiation.
Finally the subcritical crack growth period and final fracture were estimated = the total life was evaluated.
[klicova_slova_en] => pressurized vessel, total life, fatigue, fracture
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[nazev] => Local experimental determination of material characteristics for polymers related to fem analysis
[nazev_orig] => Local experimental determination of material characteristics for polymers related to fem analysis
[duvernost_udaju_id] => S
[popis] => Polymer materials exhibit a high ductility. Determination of the yield strain as well as the break (ultimate) strain is usually done on the basis of tensile tests performed on standard samples and evaluated for normalized measured length, supposing the homogeneous material deformation along the sample axis. This experimental approach does not take into account the plastic strain concentration in small neck area during the final deformation phase before the sample rupture, what is typical for the plastics behavior. Application of so defined material characteristic in the case of Finite element method (FEM) analyses of real constructions made of TSCP plastics (typical semi-crystal polymer) led to significantly conservative (smaller) values of ultimate loads compared to the measured ones. A special experimental method making use of high-speed camera has been developed to determine the strain in defined small area of local strain concentration being also in correlation with the FEM element size. Application of the more realistic (higher local) break strain value in the case of FEM analyses of real TSCP constructions led to much better agreement between the calculated and measured stiffness and ultimate load values.
[popis_orig] => Polymer materials exhibit a high ductility. Determination of the yield strain as well as the break (ultimate) strain is usually done on the basis of tensile tests performed on standard samples and evaluated for normalized measured length, supposing the homogeneous material deformation along the sample axis. This experimental approach does not take into account the plastic strain concentration in small neck area during the final deformation phase before the sample rupture, what is typical for the plastics behavior. Application of so defined material characteristic in the case of Finite element method (FEM) analyses of real constructions made of TSCP plastics (typical semi-crystal polymer) led to significantly conservative (smaller) values of ultimate loads compared to the measured ones. A special experimental method making use of high-speed camera has been developed to determine the strain in defined small area of local strain concentration being also in correlation with the FEM element size. Application of the more realistic (higher local) break strain value in the case of FEM analyses of real TSCP constructions led to much better agreement between the calculated and measured stiffness and ultimate load values.
[klicova_slova] => polymer, experiment, break limit, FEM analysis, high-speed camera
[klicova_slova_orig] => polymer, experiment, break limit, FEM analysis, high-speed camera
[url] =>
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[citace_text] => DOBEŠ, M.; VRBKA, J. Local experimental determination of material characteristics for polymers related to fem analysis. Engineering Mechanics, 2014, vol. 21, no. 3, p. 151-158. ISSN: 1802-1484.
[citace_html] => DOBEŠ, M.; VRBKA, J. Local experimental determination of material characteristics for polymers related to fem analysis. Engineering Mechanics, 2014, vol. 21, no. 3, p. 151-158. ISSN: 1802-1484.
[citace_rtf] =>
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author="Martin {Dobeš} and Jan {Vrbka}",
title="Local experimental determination of material characteristics for polymers related to fem analysis",
journal="Engineering Mechanics",
year="2014",
volume="21",
number="3",
pages="151--158",
issn="1802-1484"
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[nazev_en] => Local experimental determination of material characteristics for polymers related to fem analysis
[popis_en] => Polymer materials exhibit a high ductility. Determination of the yield strain as well as the break (ultimate) strain is usually done on the basis of tensile tests performed on standard samples and evaluated for normalized measured length, supposing the homogeneous material deformation along the sample axis. This experimental approach does not take into account the plastic strain concentration in small neck area during the final deformation phase before the sample rupture, what is typical for the plastics behavior. Application of so defined material characteristic in the case of Finite element method (FEM) analyses of real constructions made of TSCP plastics (typical semi-crystal polymer) led to significantly conservative (smaller) values of ultimate loads compared to the measured ones. A special experimental method making use of high-speed camera has been developed to determine the strain in defined small area of local strain concentration being also in correlation with the FEM element size. Application of the more realistic (higher local) break strain value in the case of FEM analyses of real TSCP constructions led to much better agreement between the calculated and measured stiffness and ultimate load values.
[klicova_slova_en] => polymer, experiment, break limit, FEM analysis, high-speed camera
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[nazev] => APPLICATION OF THE DIFFERENT COMPUTATIONAL MATERIAL MODELS OF POLYMER MATERIAL FOR EXPLICIT SOLUTION OF FEM IN LS-DYNA
[nazev_orig] => APPLICATION OF THE DIFFERENT COMPUTATIONAL MATERIAL MODELS OF POLYMER MATERIAL FOR EXPLICIT SOLUTION OF FEM IN LS-DYNA
[duvernost_udaju_id] => S
[popis] => This article deals with the experimental measuring of material data used for
computational FEM analyses. Obtained material computational models are used in common
engineering work. The focus is on the strain rate dependence of the tensile behavior of the
Polymer materials. Acquired results are demonstrated on the problem of crash test of the fuel
tank with fuel supply module. The applied loading is from real crash tests.
[popis_orig] => This article deals with the experimental measuring of material data used for
computational FEM analyses. Obtained material computational models are used in common
engineering work. The focus is on the strain rate dependence of the tensile behavior of the
Polymer materials. Acquired results are demonstrated on the problem of crash test of the fuel
tank with fuel supply module. The applied loading is from real crash tests.
[klicova_slova] => finite element method, LS-DYNA, polymer, strain rate dependence, fuel supply module
[klicova_slova_orig] => finite element method, LS-DYNA, polymer, strain rate dependence, fuel supply module
[url] =>
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[citace_text] => DOBEŠ, M.; NAVRÁTIL, J. APPLICATION OF THE DIFFERENT COMPUTATIONAL MATERIAL MODELS OF POLYMER MATERIAL FOR EXPLICIT SOLUTION OF FEM IN LS-DYNA. In 22nd SVSFEM ANSYS Users' Group Meeting and Conference 2014. 1. Jasná: SVSFEM, 2014. p. 10-19. ISBN: 978-80-905525-1-7.
[citace_html] => DOBEŠ, M.; NAVRÁTIL, J. APPLICATION OF THE DIFFERENT COMPUTATIONAL MATERIAL MODELS OF POLYMER MATERIAL FOR EXPLICIT SOLUTION OF FEM IN LS-DYNA. In 22nd SVSFEM ANSYS Users' Group Meeting and Conference 2014. 1. Jasná: SVSFEM, 2014. p. 10-19. ISBN: 978-80-905525-1-7.
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author="Martin {Dobeš} and Jiří {Navrátil}",
title="APPLICATION OF THE DIFFERENT COMPUTATIONAL MATERIAL MODELS OF POLYMER MATERIAL FOR EXPLICIT SOLUTION OF FEM IN LS-DYNA",
booktitle="22nd SVSFEM ANSYS Users' Group Meeting and Conference 2014",
year="2014",
series="1",
number="1",
pages="10--19",
publisher="SVSFEM",
address="Jasná",
isbn="978-80-905525-1-7"
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[nazev_en] => APPLICATION OF THE DIFFERENT COMPUTATIONAL MATERIAL MODELS OF POLYMER MATERIAL FOR EXPLICIT SOLUTION OF FEM IN LS-DYNA
[popis_en] => This article deals with the experimental measuring of material data used for
computational FEM analyses. Obtained material computational models are used in common
engineering work. The focus is on the strain rate dependence of the tensile behavior of the
Polymer materials. Acquired results are demonstrated on the problem of crash test of the fuel
tank with fuel supply module. The applied loading is from real crash tests.
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(
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[nazev] => The influence of the first non-singular stress terms on crack initiation direction in an orthotropic bi-material plate
[nazev_orig] => The influence of the first non-singular stress terms on crack initiation direction in an orthotropic bi-material plate
[duvernost_udaju_id] => S
[popis] => A bi-material plate composed of two orthotropic parts leads to free edge stress singularity. This is considered as a bi-material notch with w1=w2=90degree under general loading. Besides the singular term the first non-singular term is also included in the stress distribution at the notch tip. The Stroh–Eshelby–Lekhnitskii formalism for plane elasticity is used to express stress and displacement fields and the strain energy density factor. The exponents of the singular and non-singular stress terms and corresponding eigenvectors are the solution of the eigenvalue problem resulting from the prescribed boundary and compatibility conditions at the notch tip. The potential direction of crack initiation is determined from the local minimum of the mean value of the strain energy density factor in both materials. The necessary knowledge of the generalized stress intensity factor and generalized T-stress is realized by means of the employment of the two state conservation integrals. Following the assumption of the same mechanism of rupture in the case of a crack and a notch, an expression for the critical values of the generalized stress intensity factor is obtained.
[popis_orig] => A bi-material plate composed of two orthotropic parts leads to free edge stress singularity. This is considered as a bi-material notch with w1=w2=90degree under general loading. Besides the singular term the first non-singular term is also included in the stress distribution at the notch tip. The Stroh–Eshelby–Lekhnitskii formalism for plane elasticity is used to express stress and displacement fields and the strain energy density factor. The exponents of the singular and non-singular stress terms and corresponding eigenvectors are the solution of the eigenvalue problem resulting from the prescribed boundary and compatibility conditions at the notch tip. The potential direction of crack initiation is determined from the local minimum of the mean value of the strain energy density factor in both materials. The necessary knowledge of the generalized stress intensity factor and generalized T-stress is realized by means of the employment of the two state conservation integrals. Following the assumption of the same mechanism of rupture in the case of a crack and a notch, an expression for the critical values of the generalized stress intensity factor is obtained.
[klicova_slova] => Bi-material notch, Crack initiation direction, Non-singular stress term, Generalized fracture mechanics, Path-independent integral
[klicova_slova_orig] => Bi-material notch, Crack initiation direction, Non-singular stress term, Generalized fracture mechanics, Path-independent integral
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[citace_text] => KLUSÁK, J.; HRSTKA, M.; PROFANT, T.; KREPL, O.; ŠEVEČEK, O.; KOTOUL, M. The influence of the first non-singular stress terms on crack initiation direction in an orthotropic bi-material plate. THEORETICAL AND APPLIED FRACTURE MECHANICS, 2014, vol. 71, no. 2014, p. 67-75. ISSN: 0167-8442.
[citace_html] => KLUSÁK, J.; HRSTKA, M.; PROFANT, T.; KREPL, O.; ŠEVEČEK, O.; KOTOUL, M. The influence of the first non-singular stress terms on crack initiation direction in an orthotropic bi-material plate. THEORETICAL AND APPLIED FRACTURE MECHANICS, 2014, vol. 71, no. 2014, p. 67-75. ISSN: 0167-8442.
[citace_rtf] =>
[citace_bibtex] => @article{BUT109036,
author="Jan {Klusák} and Miroslav {Hrstka} and Tomáš {Profant} and Ondřej {Krepl} and Oldřich {Ševeček} and Michal {Kotoul}",
title="The influence of the first non-singular stress terms on crack initiation direction in an orthotropic bi-material plate",
journal="THEORETICAL AND APPLIED FRACTURE MECHANICS",
year="2014",
volume="71",
number="2014",
pages="67--75",
doi="10.1016/j.tafmec.2014.05.008",
issn="0167-8442"
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[nazev_en] => The influence of the first non-singular stress terms on crack initiation direction in an orthotropic bi-material plate
[popis_en] => A bi-material plate composed of two orthotropic parts leads to free edge stress singularity. This is considered as a bi-material notch with w1=w2=90degree under general loading. Besides the singular term the first non-singular term is also included in the stress distribution at the notch tip. The Stroh–Eshelby–Lekhnitskii formalism for plane elasticity is used to express stress and displacement fields and the strain energy density factor. The exponents of the singular and non-singular stress terms and corresponding eigenvectors are the solution of the eigenvalue problem resulting from the prescribed boundary and compatibility conditions at the notch tip. The potential direction of crack initiation is determined from the local minimum of the mean value of the strain energy density factor in both materials. The necessary knowledge of the generalized stress intensity factor and generalized T-stress is realized by means of the employment of the two state conservation integrals. Following the assumption of the same mechanism of rupture in the case of a crack and a notch, an expression for the critical values of the generalized stress intensity factor is obtained.
[klicova_slova_en] => Bi-material notch, Crack initiation direction, Non-singular stress term, Generalized fracture mechanics, Path-independent integral
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[nazev] => A Stability Criterion of an Orthotropic Bi-Material Notch Based on the Strain Energy Density
[nazev_orig] => A Stability Criterion of an Orthotropic Bi-Material Notch Based on the Strain Energy Density
[duvernost_udaju_id] => S
[popis] => A bi-material notch or a crack terminating at the bi-material interface composed of two orthotropic materials is considered. The stress and displacement fields are expressed using the Lekhnitskii-Eshelby-Stroh formalism for plane elasticity and as the result of an application of the psi-integral method. Knowledge of the basic stress concentrator characteristics such as stress singularity exponent and corresponding regular and auxiliary eigenvectors allows the psi-integral method allows one to evaluate the generalized stress intensity factor of the studied stress concentrator. The achieved results are used for the next analysis such as assessment of the potential direction of the crack initiation and for notch stability criteria assessment as an extension of standard crack fracture mechanics.
[popis_orig] => A bi-material notch or a crack terminating at the bi-material interface composed of two orthotropic materials is considered. The stress and displacement fields are expressed using the Lekhnitskii-Eshelby-Stroh formalism for plane elasticity and as the result of an application of the psi-integral method. Knowledge of the basic stress concentrator characteristics such as stress singularity exponent and corresponding regular and auxiliary eigenvectors allows the psi-integral method allows one to evaluate the generalized stress intensity factor of the studied stress concentrator. The achieved results are used for the next analysis such as assessment of the potential direction of the crack initiation and for notch stability criteria assessment as an extension of standard crack fracture mechanics.
[klicova_slova] => fracture mechanics, bi-material notch, stability criteria, singular stress concentrator, stress intensity factor, psi-integral
[klicova_slova_orig] => fracture mechanics, bi-material notch, stability criteria, singular stress concentrator, stress intensity factor, psi-integral
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[identifikator] => ISBN 978-80-214-4871-1
[identifikator_popis] => ISBN - Engineering Mechanics 2014
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[citace_text] => HRSTKA, M.; PROFANT, T.; KLUSÁK, J.; ŠEVEČEK, O.; KOTOUL, M. A Stability Criterion of an Orthotropic Bi-Material Notch Based on the Strain Energy Density. In Engineering Mechanics 2014. 1. Svratka: BUT, 2014. p. 232-235. ISBN: 978-80-214-4871-1.
[citace_html] => HRSTKA, M.; PROFANT, T.; KLUSÁK, J.; ŠEVEČEK, O.; KOTOUL, M. A Stability Criterion of an Orthotropic Bi-Material Notch Based on the Strain Energy Density. In Engineering Mechanics 2014. 1. Svratka: BUT, 2014. p. 232-235. ISBN: 978-80-214-4871-1.
[citace_rtf] =>
[citace_bibtex] => @inproceedings{BUT109042,
author="Miroslav {Hrstka} and Tomáš {Profant} and Jan {Klusák} and Oldřich {Ševeček} and Michal {Kotoul}",
title="A Stability Criterion of an Orthotropic Bi-Material Notch Based on the Strain Energy Density",
booktitle="Engineering Mechanics 2014",
year="2014",
series="1",
number="2014",
pages="232--235",
publisher="BUT",
address="Svratka",
isbn="978-80-214-4871-1"
}
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[poznamka_metriky] =>
[nazev_en] => A Stability Criterion of an Orthotropic Bi-Material Notch Based on the Strain Energy Density
[popis_en] => A bi-material notch or a crack terminating at the bi-material interface composed of two orthotropic materials is considered. The stress and displacement fields are expressed using the Lekhnitskii-Eshelby-Stroh formalism for plane elasticity and as the result of an application of the psi-integral method. Knowledge of the basic stress concentrator characteristics such as stress singularity exponent and corresponding regular and auxiliary eigenvectors allows the psi-integral method allows one to evaluate the generalized stress intensity factor of the studied stress concentrator. The achieved results are used for the next analysis such as assessment of the potential direction of the crack initiation and for notch stability criteria assessment as an extension of standard crack fracture mechanics.
[klicova_slova_en] => fracture mechanics, bi-material notch, stability criteria, singular stress concentrator, stress intensity factor, psi-integral
[vysledek_datum] => 2014-05-12T00:00:00+02:00
)
[10] => Array
(
[vysledek_id] => 109045
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[nazev] => Numerical Analysis of Sub-Critical Crack Growth in Particulate Ceramic Composites
[nazev_orig] => Numerical Analysis of Sub-Critical Crack Growth in Particulate Ceramic Composites
[duvernost_udaju_id] => S
[popis] => The strength of glass or ceramic containing materials can be affected by the environment (stress corrosion). Under applied stress, crack-like defects may grow (sub-critically) for stress intensity factors, KI, below the fracture toughness of the material, KIc. The aim of the present work was to develop a two-dimensional finite element model to analyze the subcritical crack growth behavior of ceramic-based particulate composites. The maximum tangential stress criterion (MTS) was used to predict the direction of the crack propagation, in the framework of linear elastic fracture mechanics. The modeled material was a Low Temperature Co-fired Ceramic (LTCC), containing alumina particles embedded in a glass matrix. The experimentally determined SCCG material behavior (i.e. v-KI data) was implemented in the numerical model. The effect of the elastic modulus of the particles on the subcritical crack propagation was investigated. The conclusions of this paper can contribute to a better understanding of the subcritical propagation of cracks in particulate composites.
[popis_orig] => The strength of glass or ceramic containing materials can be affected by the environment (stress corrosion). Under applied stress, crack-like defects may grow (sub-critically) for stress intensity factors, KI, below the fracture toughness of the material, KIc. The aim of the present work was to develop a two-dimensional finite element model to analyze the subcritical crack growth behavior of ceramic-based particulate composites. The maximum tangential stress criterion (MTS) was used to predict the direction of the crack propagation, in the framework of linear elastic fracture mechanics. The modeled material was a Low Temperature Co-fired Ceramic (LTCC), containing alumina particles embedded in a glass matrix. The experimentally determined SCCG material behavior (i.e. v-KI data) was implemented in the numerical model. The effect of the elastic modulus of the particles on the subcritical crack propagation was investigated. The conclusions of this paper can contribute to a better understanding of the subcritical propagation of cracks in particulate composites.
[klicova_slova] => Fracture Mechanics; Low Temperature Co-fired Ceramics; Micro-crack Propagation; Finite Element Method; Lifetime Estimation
[klicova_slova_orig] => Fracture Mechanics; Low Temperature Co-fired Ceramics; Micro-crack Propagation; Finite Element Method; Lifetime Estimation
[url] =>
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[odpovedny_utvar_nazev] => Institute of Solid Mechanics, Mechatronics and Biomechanics
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[druh_popis] => Peer-reviewed article included in Web of Science database as as an “Article”, “Review” or “Letter”
[stav] => Approved
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[ins_ts] => 2025-09-22
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[identifikator] => ISSN 2211-8128
[identifikator_popis] => ISSN - Procedia Materials Science (NL)
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[citace_text] => MAJER, Z.; PLETZ, M.; KRAUTGASSER, C.; NÁHLÍK, L.; HUTAŘ, P.; BERMEJO, R. Numerical Analysis of Sub-Critical Crack Growth in Particulate Ceramic Composites. Procedia Materials Science, 2014, vol. 3, no. 1, p. 2071-2076. ISSN: 2211-8128.
[citace_html] => MAJER, Z.; PLETZ, M.; KRAUTGASSER, C.; NÁHLÍK, L.; HUTAŘ, P.; BERMEJO, R. Numerical Analysis of Sub-Critical Crack Growth in Particulate Ceramic Composites. Procedia Materials Science, 2014, vol. 3, no. 1, p. 2071-2076. ISSN: 2211-8128.
[citace_rtf] =>
[citace_bibtex] => @article{BUT109045,
author="Zdeněk {Majer} and Martin {Pletz} and Clemens {Krautgasser} and Luboš {Náhlík} and Pavel {Hutař} and Raul {Bermejo}",
title="Numerical Analysis of Sub-Critical Crack Growth in Particulate Ceramic Composites",
journal="Procedia Materials Science",
year="2014",
volume="3",
number="1",
pages="2071--2076",
doi="10.1016/j.mspro.2014.06.335",
issn="2211-8128"
}
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[poznamka_metriky] =>
[nazev_en] => Numerical Analysis of Sub-Critical Crack Growth in Particulate Ceramic Composites
[popis_en] => The strength of glass or ceramic containing materials can be affected by the environment (stress corrosion). Under applied stress, crack-like defects may grow (sub-critically) for stress intensity factors, KI, below the fracture toughness of the material, KIc. The aim of the present work was to develop a two-dimensional finite element model to analyze the subcritical crack growth behavior of ceramic-based particulate composites. The maximum tangential stress criterion (MTS) was used to predict the direction of the crack propagation, in the framework of linear elastic fracture mechanics. The modeled material was a Low Temperature Co-fired Ceramic (LTCC), containing alumina particles embedded in a glass matrix. The experimentally determined SCCG material behavior (i.e. v-KI data) was implemented in the numerical model. The effect of the elastic modulus of the particles on the subcritical crack propagation was investigated. The conclusions of this paper can contribute to a better understanding of the subcritical propagation of cracks in particulate composites.
[klicova_slova_en] => Fracture Mechanics; Low Temperature Co-fired Ceramics; Micro-crack Propagation; Finite Element Method; Lifetime Estimation
[vysledek_datum] => 2014-07-01T00:00:00+02:00
)
[11] => Array
(
[vysledek_id] => 109056
[vysledek_druh_id] => CONPA
[ex_vysledek_id] => 110177
[vysledek_rok] => 2015
[nazev] => Point load effect determination for different pressure pipe SDR series
[nazev_orig] => Point load effect determination for different pressure pipe SDR series
[duvernost_udaju_id] => S
[popis] => In the paper the polymer pipes loaded by internal pressure with additional point load on the external surface are studied using numerical methods. It is shown that the additional external loading can significantly influence residual lifetime of the pressured pipe. In this study the effect of the pipe geometry is considered. The shape of the propagating crack is estimated based on a special algorithm and the stress intensity factor is evaluated by direct method. The relation between crack size and a geometric function Y(a-s) for specific material and geometrical properties is found. The results of this paper should contribute to better understanding of the real pipe behavior and to prevent unexpected failure of the pressured pipe system due to non-homogenous distribution of the soil load.
[popis_orig] => In the paper the polymer pipes loaded by internal pressure with additional point load on the external surface are studied using numerical methods. It is shown that the additional external loading can significantly influence residual lifetime of the pressured pipe. In this study the effect of the pipe geometry is considered. The shape of the propagating crack is estimated based on a special algorithm and the stress intensity factor is evaluated by direct method. The relation between crack size and a geometric function Y(a-s) for specific material and geometrical properties is found. The results of this paper should contribute to better understanding of the real pipe behavior and to prevent unexpected failure of the pressured pipe system due to non-homogenous distribution of the soil load.
[klicova_slova] => polymer pressure pipes, point load, FEM, stress intensity factor, lifetime prediction
[klicova_slova_orig] => polymer pressure pipes, point load, FEM, stress intensity factor, lifetime prediction
[url] =>
[oecd_obor_id] => 20306
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[odpovedny_utvar_nazev] => Institute of Solid Mechanics, Mechatronics and Biomechanics
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[vycet_osob] => MAJER, Z.; ŠEVČÍK, M.; NÁHLÍK, L.; HUTAŘ, P.
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[ins_ts] => 2025-09-22
[upd_ts] => 2025-09-22
[status] => 9
[identifikator] => ISBN 978-3-03835-235-8 ISSN 1013-9826
[identifikator_popis] => ISBN - Advances in Fracture and Damage Mechanics XIII ISSN - Key Engineering Materials (print) (CH)
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[citace_text] => MAJER, Z.; ŠEVČÍK, M.; NÁHLÍK, L.; HUTAŘ, P. Point load effect determination for different pressure pipe SDR series. In Advances in Fracture and Damage Mechanics XIII. Key Engineering Materials (print). Switzerland: Trans Tech Publications, 2015. no. 1, p. 373-376. ISBN: 978-3-03835-235-8. ISSN: 1013-9826.
[citace_html] => MAJER, Z.; ŠEVČÍK, M.; NÁHLÍK, L.; HUTAŘ, P. Point load effect determination for different pressure pipe SDR series. In Advances in Fracture and Damage Mechanics XIII. Key Engineering Materials (print). Switzerland: Trans Tech Publications, 2015. no. 1, p. 373-376. ISBN: 978-3-03835-235-8. ISSN: 1013-9826.
[citace_rtf] =>
[citace_bibtex] => @inproceedings{BUT109056,
author="Zdeněk {Majer} and Martin {Ševčík} and Luboš {Náhlík} and Pavel {Hutař}",
title="Point load effect determination for different pressure pipe SDR series",
booktitle="Advances in Fracture and Damage Mechanics XIII",
year="2015",
journal="Key Engineering Materials (print)",
volume="627",
number="1",
pages="373--376",
publisher="Trans Tech Publications",
address="Switzerland",
doi="10.4028/www.scientific.net/KEM.627.373",
isbn="978-3-03835-235-8",
issn="1013-9826"
}
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[nazev_en] => Point load effect determination for different pressure pipe SDR series
[popis_en] => In the paper the polymer pipes loaded by internal pressure with additional point load on the external surface are studied using numerical methods. It is shown that the additional external loading can significantly influence residual lifetime of the pressured pipe. In this study the effect of the pipe geometry is considered. The shape of the propagating crack is estimated based on a special algorithm and the stress intensity factor is evaluated by direct method. The relation between crack size and a geometric function Y(a-s) for specific material and geometrical properties is found. The results of this paper should contribute to better understanding of the real pipe behavior and to prevent unexpected failure of the pressured pipe system due to non-homogenous distribution of the soil load.
[klicova_slova_en] => polymer pressure pipes, point load, FEM, stress intensity factor, lifetime prediction
[vysledek_datum] => 2015-01-05T00:00:00+01:00
)
[12] => Array
(
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[nazev] => Subsynchronous frequency Subsynchronous frequency of a turbocharger rotor
[nazev_orig] => Subsynchronous frequency Subsynchronous frequency of a turbocharger rotor
[duvernost_udaju_id] => S
[popis] => This article describes the shift of the subsynchronous frequency due to change in lubricant temperature. A small diesel turbocharger
for a passenger vehicle with semi-floating bearing system was investigated. Measurements were taken on a combustion engine
using an external device as a source of lubricant for the turbocharger. Two temperature regimes were selected, 30 degrees C representing
cold lubricant conditions, and 100 degrees C as the normal operating temperature. Lubricant pressure level was maintained at 1 bar during
the entire test procedure. Results show the significant influence of lubricant temperature on the subsynchronous frequency of rotors.
[popis_orig] => This article describes the shift of the subsynchronous frequency due to change in lubricant temperature. A small diesel turbocharger
for a passenger vehicle with semi-floating bearing system was investigated. Measurements were taken on a combustion engine
using an external device as a source of lubricant for the turbocharger. Two temperature regimes were selected, 30 degrees C representing
cold lubricant conditions, and 100 degrees C as the normal operating temperature. Lubricant pressure level was maintained at 1 bar during
the entire test procedure. Results show the significant influence of lubricant temperature on the subsynchronous frequency of rotors.
[klicova_slova] => Subsynchronous frequency, rotor dynamics, turbocharger, shaft motion
[klicova_slova_orig] => Subsynchronous frequency, rotor dynamics, turbocharger, shaft motion
[url] =>
[oecd_obor_id] => 20304
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[vycet_osob] => FRYŠČOK, T.; ŽATKO, M.
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[znamka] =>
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[druh_nazev] => Peer-reviewed article not indexed in WoS or Scopus
[druh_popis] => Other original article or review in a peer-reviewed scientific periodical not included in WoS or Scopus
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[upravil] => Informační systém Automat
[ins_uid] => 999999
[upd_uid] => 999999
[ins_ts] => 2025-09-22
[upd_ts] => 2025-09-22
[status] => 9
[identifikator] => ISSN 1214-0821
[identifikator_popis] => ISSN - MECCA - Journal of Middle European Costruction and Design of Cars (CZ)
[riv_dodavka_id] =>
[riv_dodavka_oznaceni] =>
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[citace_text] => FRYŠČOK, T.; ŽATKO, M. Subsynchronous frequency Subsynchronous frequency of a turbocharger rotor. MECCA - Journal of Middle European Costruction and Design of Cars, 2013, vol. 2013(11), no. 2, p. 1-4. ISSN: 1214-0821.
[citace_html] => FRYŠČOK, T.; ŽATKO, M. Subsynchronous frequency Subsynchronous frequency of a turbocharger rotor. MECCA - Journal of Middle European Costruction and Design of Cars, 2013, vol. 2013(11), no. 2, p. 1-4. ISSN: 1214-0821.
[citace_rtf] =>
[citace_bibtex] => @article{BUT109144,
author="Tomáš {Fryščok} and Miroslav {Žatko}",
title="Subsynchronous frequency Subsynchronous frequency of a turbocharger rotor",
journal="MECCA - Journal of Middle European Costruction and Design of Cars",
year="2013",
volume="2013(11)",
number="2",
pages="1--4",
issn="1214-0821"
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for a passenger vehicle with semi-floating bearing system was investigated. Measurements were taken on a combustion engine
using an external device as a source of lubricant for the turbocharger. Two temperature regimes were selected, 30 degrees C representing
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[popis_orig] => This article describes the shift of the subsynchronous frequency due to change in lubricant temperature. A small diesel turbocharger
for a passenger vehicle with semi-floating bearing system was investigated. Measurements were taken on a combustion engine
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cold lubricant conditions, and 100 degrees C as the normal operating temperature. Lubricant pressure level was maintained at 1 bar during
the entire test procedure. Results show the significant influence of lubricant temperature on the subsynchronous frequency of rotors.
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[popis_en] => This article describes the shift of the subsynchronous frequency due to change in lubricant temperature. A small diesel turbocharger
for a passenger vehicle with semi-floating bearing system was investigated. Measurements were taken on a combustion engine
using an external device as a source of lubricant for the turbocharger. Two temperature regimes were selected, 30 degrees C representing
cold lubricant conditions, and 100 degrees C as the normal operating temperature. Lubricant pressure level was maintained at 1 bar during
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