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[nazev] => Experimental investigation of silicone impression materials
[nazev_orig] => Experimental investigation of silicone impression materials
[duvernost_udaju_id] =>
[popis] => Silicone impression materials are widely used in orthodontic practice for dental impressions, but they can be used in different applications. One potential application is the use of protective obturators during anaesthesia prior to cleft palate surgery. These silicone materials come from various brands with different material properties, which can influence the final product. Thus, these different mechanical properties were examined experimentally. Tensile tests were performed on specimens prepared with the use of 3D printed moulds and their structure was investigated by micro-CT.
[popis_orig] => Silicone impression materials are widely used in orthodontic practice for dental impressions, but they can be used in different applications. One potential application is the use of protective obturators during anaesthesia prior to cleft palate surgery. These silicone materials come from various brands with different material properties, which can influence the final product. Thus, these different mechanical properties were examined experimentally. Tensile tests were performed on specimens prepared with the use of 3D printed moulds and their structure was investigated by micro-CT.
[klicova_slova] => micro-CT | Silicone materials | tensile testing
[klicova_slova_orig] => micro-CT | Silicone materials | tensile testing
[url] => https://www.sciencedirect.com/science/article/pii/S2452321625005256
[oecd_obor_id] => 20100
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[vycet_osob] => HRUBANOVÁ, A.; THOMKOVÁ, B.; BORÁK, L.; KOŠKOVÁ, O.; RICHTROVA, M.; MARCIÁN, P.
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[upd_ts] => 2026-03-23
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[citace_text] => HRUBANOVÁ, A.; THOMKOVÁ, B.; BORÁK, L.; KOŠKOVÁ, O.; RICHTROVA, M.; MARCIÁN, P. Experimental investigation of silicone impression materials. In Procedia Structural Integrity. Procedia Structural Integrity. Elsevier B.V., 2025. no. 1, p. 33-37.
[citace_html] => HRUBANOVÁ, A.; THOMKOVÁ, B.; BORÁK, L.; KOŠKOVÁ, O.; RICHTROVA, M.; MARCIÁN, P. Experimental investigation of silicone impression materials. In Procedia Structural Integrity. Procedia Structural Integrity. Elsevier B.V., 2025. no. 1, p. 33-37.
[citace_rtf] =>
[citace_bibtex] => @inproceedings{BUT201403,
author="{} and Anna {Hrubanová} and {} and Barbora {Thomková} and {} and Libor {Borák} and {} and Olga {Košková} and {} and Michaela {Richtrova} and {} and Petr {Marcián}",
title="Experimental investigation of silicone impression materials",
booktitle="Procedia Structural Integrity",
year="2025",
journal="Procedia Structural Integrity",
volume="74",
number="1",
pages="33--37",
publisher="Elsevier B.V.",
doi="10.1016/j.prostr.2025.10.030",
url="https://www.sciencedirect.com/science/article/pii/S2452321625005256"
}
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[nazev_en] => Experimental investigation of silicone impression materials
[popis_en] => Silicone impression materials are widely used in orthodontic practice for dental impressions, but they can be used in different applications. One potential application is the use of protective obturators during anaesthesia prior to cleft palate surgery. These silicone materials come from various brands with different material properties, which can influence the final product. Thus, these different mechanical properties were examined experimentally. Tensile tests were performed on specimens prepared with the use of 3D printed moulds and their structure was investigated by micro-CT.
[klicova_slova_en] => micro-CT | Silicone materials | tensile testing
[vysledek_datum] => 2025-12-08T00:00:00+01:00
)
[1] => Array
(
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[nazev] => Influence of initial misfit strains on small scale domain switching ahead of interface crack between piezoelectric layer and dielectric isotropic substrate
[nazev_orig] => Influence of initial misfit strains on small scale domain switching ahead of interface crack between piezoelectric layer and dielectric isotropic substrate
[duvernost_udaju_id] => S
[popis] => his study derives the effect of discontinuous initial strain distributions on the small-scale domain switching ahead of the bi-material notch formed between a piezoelectric layer and dielectric isotropic substrate. As a piezoelectric layer the piezoelectric ceramics PZT-5H grown on the elastic substrate formed by amorphous silicon dioxide (SiO 2) is considered. The energetic switching principle and micromechanical domain switching framework proposed by Hwang et al. (1995) is applied. The initial thermal misfit constant strain is included in the constitutive relations. The analysis of the asymptotic in-plane field of the bi-material notch is conducted utilizing the extended Lekhnitskii-Eshelby-Stroh formalism. The asymptotic in-plane field is used to predict the domain switching zone applying the energy-based criterion. The influence of the thermal misfit strain on the size and shape of the switching zone in the piezoelectric layer is computed for various initial poling directions.
[popis_orig] => his study derives the effect of discontinuous initial strain distributions on the small-scale domain switching ahead of the bi-material notch formed between a piezoelectric layer and dielectric isotropic substrate. As a piezoelectric layer the piezoelectric ceramics PZT-5H grown on the elastic substrate formed by amorphous silicon dioxide (SiO 2) is considered. The energetic switching principle and micromechanical domain switching framework proposed by Hwang et al. (1995) is applied. The initial thermal misfit constant strain is included in the constitutive relations. The analysis of the asymptotic in-plane field of the bi-material notch is conducted utilizing the extended Lekhnitskii-Eshelby-Stroh formalism. The asymptotic in-plane field is used to predict the domain switching zone applying the energy-based criterion. The influence of the thermal misfit strain on the size and shape of the switching zone in the piezoelectric layer is computed for various initial poling directions.
[klicova_slova] => Small-scale domain switching; Piezoelectric interface crack; Expanded LES formalism; Two-state H-integral
[klicova_slova_orig] => Small-scale domain switching; Piezoelectric interface crack; Expanded LES formalism; Two-state H-integral
[url] => https://www.sciencedirect.com/science/article/pii/S2452321626001514
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[kod_doi] => 10.1016/j.prostr.2026.02.046
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[kategorie_nazev] => Publikační výsledky
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[stav] => Schválený
[vysledek_kategorie_id] => PV
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[citace_text] => Hrstka, Kotoul, Profant, Aliabadi. Influence of initial misfit strains on small scale domain switching ahead of interface crack between piezoelectric layer and dielectric isotropic substrate. Procedia Structural Integrity. Elsevier BV, 2026. p. 471-492.
[citace_html] => Hrstka, Kotoul, Profant, Aliabadi. Influence of initial misfit strains on small scale domain switching ahead of interface crack between piezoelectric layer and dielectric isotropic substrate. Procedia Structural Integrity. Elsevier BV, 2026. p. 471-492.
[citace_rtf] =>
[citace_bibtex] => @misc{BUT201455,
author="Miroslav {Hrstka} and Michal {Kotoul} and Tomáš {Profant} and {}",
title="Influence of initial misfit strains on small scale domain switching ahead of interface crack between piezoelectric layer and dielectric isotropic substrate",
year="2026",
journal="Procedia Structural Integrity",
volume="80",
pages="471--492",
publisher="Elsevier BV",
doi="10.1016/j.prostr.2026.02.046",
url="https://www.sciencedirect.com/science/article/pii/S2452321626001514",
note="Article - other"
}
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[nazev_en] => Influence of initial misfit strains on small scale domain switching ahead of interface crack between piezoelectric layer and dielectric isotropic substrate
[popis_en] => his study derives the effect of discontinuous initial strain distributions on the small-scale domain switching ahead of the bi-material notch formed between a piezoelectric layer and dielectric isotropic substrate. As a piezoelectric layer the piezoelectric ceramics PZT-5H grown on the elastic substrate formed by amorphous silicon dioxide (SiO 2) is considered. The energetic switching principle and micromechanical domain switching framework proposed by Hwang et al. (1995) is applied. The initial thermal misfit constant strain is included in the constitutive relations. The analysis of the asymptotic in-plane field of the bi-material notch is conducted utilizing the extended Lekhnitskii-Eshelby-Stroh formalism. The asymptotic in-plane field is used to predict the domain switching zone applying the energy-based criterion. The influence of the thermal misfit strain on the size and shape of the switching zone in the piezoelectric layer is computed for various initial poling directions.
[klicova_slova_en] => Small-scale domain switching; Piezoelectric interface crack; Expanded LES formalism; Two-state H-integral
[vysledek_datum] => 2026-02-17T00:00:00+01:00
)
[2] => Array
(
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[nazev] => Physics-Informed Neural Networks for Multiscale Large Deformation Analysis of Metamaterials
[nazev_orig] => Physics-Informed Neural Networks for Multiscale Large Deformation Analysis of Metamaterials
[duvernost_udaju_id] => S
[popis] => Physics-informed neural networks (PINNs) have recently emerged as a promising alternative to traditional numerical methods for solving solid mechanics problems. In this work, we propose a novel PINN architecture designed for homogenisation problems of metamaterials under large deformation. The architecture incorporates periodic functions to ensure exactly imposed boundary conditions and employs an energy-based loss for efficient training. Three representative metamaterial structures—octet truss, gyroid, and spindoid—are selected as case studies. The results demonstrate that the proposed PINN achieves accuracy comparable to finite element analysis (FEA), while offering improved computational efficiency for high-volume-fraction structures. Beyond accuracy and speed, the meshfree nature and flexibility of PINNs provide clear advantages, highlighting their potential as a scalable tool for modelling complex materials.
[popis_orig] => Physics-informed neural networks (PINNs) have recently emerged as a promising alternative to traditional numerical methods for solving solid mechanics problems. In this work, we propose a novel PINN architecture designed for homogenisation problems of metamaterials under large deformation. The architecture incorporates periodic functions to ensure exactly imposed boundary conditions and employs an energy-based loss for efficient training. Three representative metamaterial structures—octet truss, gyroid, and spindoid—are selected as case studies. The results demonstrate that the proposed PINN achieves accuracy comparable to finite element analysis (FEA), while offering improved computational efficiency for high-volume-fraction structures. Beyond accuracy and speed, the meshfree nature and flexibility of PINNs provide clear advantages, highlighting their potential as a scalable tool for modelling complex materials.
[klicova_slova] => Physics informed neural network; Homogenisation; Metamaterials; Multiscale Analysis
[klicova_slova_orig] => Physics informed neural network; Homogenisation; Metamaterials; Multiscale Analysis
[url] => https://www.sciencedirect.com/science/article/pii/S2452321626001058
[oecd_obor_id] => 20300
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[odpovedny_utvar_nazev] => Ústav mechaniky těles, mechatroniky a biomechaniky
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[vycet_osob] => LI, H.; KHODAEI, Z.; KOTOUL, M.; ALIABADI, M.
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[upravil] => Petruška Jindřich
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[citace_text] => LI, H.; KHODAEI, Z.; KOTOUL, M.; ALIABADI, M. Physics-Informed Neural Networks for Multiscale Large Deformation Analysis of Metamaterials. Procedia Structural Integrity. Procedia Structural Integrity. Elsevier BV, 2026. p. 23-30.
[citace_html] => LI, H.; KHODAEI, Z.; KOTOUL, M.; ALIABADI, M. Physics-Informed Neural Networks for Multiscale Large Deformation Analysis of Metamaterials. Procedia Structural Integrity. Procedia Structural Integrity. Elsevier BV, 2026. p. 23-30.
[citace_rtf] =>
[citace_bibtex] => @misc{BUT201477,
author="{} and {} and Michal {Kotoul} and {}",
title="Physics-Informed Neural Networks for Multiscale Large Deformation Analysis of Metamaterials",
booktitle="Procedia Structural Integrity",
year="2026",
journal="Procedia Structural Integrity",
volume="80",
pages="23--30",
publisher="Elsevier BV",
doi="10.1016/j.prostr.2026.02.003",
url="https://www.sciencedirect.com/science/article/pii/S2452321626001058",
note="Other unclassified results"
}
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[nazev_en] => Physics-Informed Neural Networks for Multiscale Large Deformation Analysis of Metamaterials
[popis_en] => Physics-informed neural networks (PINNs) have recently emerged as a promising alternative to traditional numerical methods for solving solid mechanics problems. In this work, we propose a novel PINN architecture designed for homogenisation problems of metamaterials under large deformation. The architecture incorporates periodic functions to ensure exactly imposed boundary conditions and employs an energy-based loss for efficient training. Three representative metamaterial structures—octet truss, gyroid, and spindoid—are selected as case studies. The results demonstrate that the proposed PINN achieves accuracy comparable to finite element analysis (FEA), while offering improved computational efficiency for high-volume-fraction structures. Beyond accuracy and speed, the meshfree nature and flexibility of PINNs provide clear advantages, highlighting their potential as a scalable tool for modelling complex materials.
[klicova_slova_en] => Physics informed neural network; Homogenisation; Metamaterials; Multiscale Analysis
[vysledek_datum] => 2026-02-16T00:00:00+01:00
)
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(
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[nazev] => Fatigue life prediction of weld joints: Microstructural variation can be omitted while residual stress consideration is essential
[nazev_orig] => Fatigue life prediction of weld joints: Microstructural variation can be omitted while residual stress consideration is essential
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[popis] => The work focused on residual fatigue life (RFL) prediction of non-standard dog bone specimens made of the low alloy steel P265GH containing a butt weld joint (Double-Bevel-Groove-Weld). Numerical predictions were based on crack growth rate data measured on the standard compact tension (C(T)) specimens fabricated from the three structural parts of the weld joint, the base metal, the weld metal and the heat-affected zone. X-ray diffraction measurement technique was used to determine residual stress distribution in the weld joints. The results were incorporated into the numerical model. Residual stress profiles in the C(T) and the dog bone specimens exhibited significant differences. Even the lower bound of the crack propagation data obtained from the standard laboratory specimens can be non-conservative. When no residual stress was considered in the numerical model, the computed RFLs of the dog bone specimens in the as-welded state were much different from the experimental results. Consideration of different material data for each weld zone, which is the standard method, resulted in highly non-conservative results. Consideration of the residual stress field in the numerical model was crucial to reach good agreement with the experiments (relative error of about 7-10%). Variation of microstructure did not affect crack growth rates significantly. The base metal data alone were sufficient for all simulations, making the demanding procedure of material data acquisition for each of the weld zones unnecessary. The results helped to bring clarity and understanding to the issue of fatigue of weld joints, contributing to both science and applications.
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[citace_text] => EAN 2024 Experimentální analýza napětí. Boží Dar (04.06.2024)
[citace_html] => EAN 2024 Experimentální analýza napětí. Boží Dar (04.06.2024)
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title="EAN 2024 Experimentální analýza napětí",
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url="https://ean2024.vzuplzen.cz",
note="External event"
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[nazev] => Increasing Sensitivity of Mass Detection Using Nonlinear Micro/Nano-Mechanical Resonators
[nazev_orig] => Increasing Sensitivity of Mass Detection Using Nonlinear Micro/Nano-Mechanical Resonators
[duvernost_udaju_id] => S
[popis] => The contribution discusses possible approach(es) for detection of the mass of a (nano)particle/molecule attached to a micro/nano-mechanical resonator operating in non-linear vibrational conditions. The mass of the particle can be extracted either based upon the jump down/up frequencies or jump down/up amplitudes occurring upon the sweep over the first and/or second natural frequency of the resonator. To unambiguously identify the attached particle/molecule on the resonator, always two parameters are essential to be measured simultaneously. Either the two (consecutive) jump down/up frequencies in non-linear regime or just the first jump down/up frequency and corresponding maximal amplitude at the same moment. The last possibility is to combine both cases leading yet to a higher sensitivity of the mass detection. The mentioned approaches have their advantages and disadvantages which are described and discusses in this contribution.
[popis_orig] => The contribution discusses possible approach(es) for detection of the mass of a (nano)particle/molecule attached to a micro/nano-mechanical resonator operating in non-linear vibrational conditions. The mass of the particle can be extracted either based upon the jump down/up frequencies or jump down/up amplitudes occurring upon the sweep over the first and/or second natural frequency of the resonator. To unambiguously identify the attached particle/molecule on the resonator, always two parameters are essential to be measured simultaneously. Either the two (consecutive) jump down/up frequencies in non-linear regime or just the first jump down/up frequency and corresponding maximal amplitude at the same moment. The last possibility is to combine both cases leading yet to a higher sensitivity of the mass detection. The mentioned approaches have their advantages and disadvantages which are described and discusses in this contribution.
[klicova_slova] => mass spectrometry;micromechanical resonator;FEM;nonlinearity;;vibrations
[klicova_slova_orig] => mass spectrometry;micromechanical resonator;FEM;nonlinearity;;vibrations
[url] => https://ieeexplore.ieee.org/document/10324919
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[vycet_osob] => ŠEVEČEK, O.; SKALKA, P.; VENSKÝ, J.; KOTOUL, M.; PRÁŠEK, J.; STACHIV, I.
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[ins_ts] => 2025-09-22
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[identifikator] => ISBN 979-8-3503-0387-2 ISSN 1930-0395
[identifikator_popis] => ISBN - Proceedings of IEEE Sensors 2023 ISSN - The Seventh IEEE Conference on SENSORS (US)
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[citace_text] => ŠEVEČEK, O.; SKALKA, P.; VENSKÝ, J.; KOTOUL, M.; PRÁŠEK, J.; STACHIV, I. Increasing Sensitivity of Mass Detection Using Nonlinear Micro/Nano-Mechanical Resonators. In Proceedings of IEEE Sensors 2023. The Seventh IEEE Conference on SENSORS. Vienna, Austria: Institute of Electrical and Electronics Engineers Inc., 2023. no. 1, 4 p. ISBN: 979-8-3503-0387-2. ISSN: 1930-0395.
[citace_html] => ŠEVEČEK, O.; SKALKA, P.; VENSKÝ, J.; KOTOUL, M.; PRÁŠEK, J.; STACHIV, I. Increasing Sensitivity of Mass Detection Using Nonlinear Micro/Nano-Mechanical Resonators. In Proceedings of IEEE Sensors 2023. The Seventh IEEE Conference on SENSORS. Vienna, Austria: Institute of Electrical and Electronics Engineers Inc., 2023. no. 1, 4 p. ISBN: 979-8-3503-0387-2. ISSN: 1930-0395.
[citace_rtf] =>
[citace_bibtex] => @inproceedings{BUT187023,
author="Oldřich {Ševeček} and Petr {Skalka} and Jiří {Venský} and Michal {Kotoul} and Jan {Prášek} and Ivo {Stachiv}",
title="Increasing Sensitivity of Mass Detection Using Nonlinear Micro/Nano-Mechanical Resonators",
booktitle="Proceedings of IEEE Sensors 2023",
year="2023",
journal="The Seventh IEEE Conference on SENSORS",
volume="2023",
number="1",
pages="4",
publisher="Institute of Electrical and Electronics Engineers Inc.",
address="Vienna, Austria",
doi="10.1109/SENSORS56945.2023.10324919",
isbn="979-8-3503-0387-2",
issn="1930-0395",
url="https://ieeexplore.ieee.org/document/10324919"
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[nazev_en] => Increasing Sensitivity of Mass Detection Using Nonlinear Micro/Nano-Mechanical Resonators
[popis_en] => The contribution discusses possible approach(es) for detection of the mass of a (nano)particle/molecule attached to a micro/nano-mechanical resonator operating in non-linear vibrational conditions. The mass of the particle can be extracted either based upon the jump down/up frequencies or jump down/up amplitudes occurring upon the sweep over the first and/or second natural frequency of the resonator. To unambiguously identify the attached particle/molecule on the resonator, always two parameters are essential to be measured simultaneously. Either the two (consecutive) jump down/up frequencies in non-linear regime or just the first jump down/up frequency and corresponding maximal amplitude at the same moment. The last possibility is to combine both cases leading yet to a higher sensitivity of the mass detection. The mentioned approaches have their advantages and disadvantages which are described and discusses in this contribution.
[klicova_slova_en] => mass spectrometry;micromechanical resonator;FEM;nonlinearity;;vibrations
[vysledek_datum] => 2023-11-28T00:00:00+01:00
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(
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[nazev] => FEM Model of Electro-magnetic Vibration Energy Harvester
[nazev_orig] => FEM Model of Electro-magnetic Vibration Energy Harvester
[duvernost_udaju_id] => S
[popis] => This paper deals with finite element method analyses, shortly FEM, of electro-magnetic vibration energy harvester in Ansys Maxwell environment. Development and simulation modeling of energy harvesting devices is presented long time by our mechatronic team and several successful harvesters were tested in industrial applications. The adequate simulation model is fundamental for development of a successful industrial application of the electro-magnetic vibration energy harvester due to complexity of this mechatronic system. The presented approach of simulation modeling is based on complex FEM analyses in Maxwell environment and it provides useful tool for precise simulation modeling of developed energy harvesting applications.
[popis_orig] => This paper deals with finite element method analyses, shortly FEM, of electro-magnetic vibration energy harvester in Ansys Maxwell environment. Development and simulation modeling of energy harvesting devices is presented long time by our mechatronic team and several successful harvesters were tested in industrial applications. The adequate simulation model is fundamental for development of a successful industrial application of the electro-magnetic vibration energy harvester due to complexity of this mechatronic system. The presented approach of simulation modeling is based on complex FEM analyses in Maxwell environment and it provides useful tool for precise simulation modeling of developed energy harvesting applications.
[klicova_slova] => FEM, energy harvesting, simulation
[klicova_slova_orig] => FEM, energy harvesting, simulation
[url] =>
[oecd_obor_id] => 20201
[odpovedny_utvar_id] => 20500
[odpovedny_utvar_nazev] => NeTME - divize mechatroniky
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[nadrazena_soucast_id] => 4
[nadrazena_soucast_zkratka] => FSI
[nadrazena_soucast_nazev] => Fakulta strojního inženýrství
[originalni_jazyk] => en
[schvalil_id] => 11599
[schvaleno] => 2017-02-01
[vykazovat_riv] => 1
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[slozka_id] =>
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[vycet_osob] => HADAŠ, Z.; HUZLÍK, R.
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[poznamka] =>
[typ_nazev] =>
[kod_doi] => 10.1007/978-3-319-02294-9_47
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[znamka] =>
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[ins_ts] => 2025-09-22
[upd_ts] => 2025-09-22
[status] => 9
[identifikator] => ISBN 978-3-319-02294-9
[identifikator_popis] => ISBN - Mechatronics 2013: Recent Technological and Scientific Advances
[riv_dodavka_id] => 494
[riv_dodavka_oznaceni] => RIV14-MSM-26210___
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[citace_text] => HADAŠ, Z.; HUZLÍK, R. FEM Model of Electro-magnetic Vibration Energy Harvester. In Mechatronics 2013: Recent Technological and Scientific Advances. Springer, 2013. p. 371-377. ISBN: 978-3-319-02294-9.
[citace_html] => HADAŠ, Z.; HUZLÍK, R. FEM Model of Electro-magnetic Vibration Energy Harvester. In Mechatronics 2013: Recent Technological and Scientific Advances. Springer, 2013. p. 371-377. ISBN: 978-3-319-02294-9.
[citace_rtf] =>
[citace_bibtex] => @inproceedings{BUT102606,
author="Zdeněk {Hadaš} and Rostislav {Huzlík}",
title="FEM Model of Electro-magnetic Vibration Energy Harvester",
booktitle="Mechatronics 2013: Recent Technological and Scientific Advances",
year="2013",
pages="371--377",
publisher="Springer",
doi="10.1007/978-3-319-02294-9\{_}47",
isbn="978-3-319-02294-9"
}
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[nazev_en] => FEM Model of Electro-magnetic Vibration Energy Harvester
[popis_en] => This paper deals with finite element method analyses, shortly FEM, of electro-magnetic vibration energy harvester in Ansys Maxwell environment. Development and simulation modeling of energy harvesting devices is presented long time by our mechatronic team and several successful harvesters were tested in industrial applications. The adequate simulation model is fundamental for development of a successful industrial application of the electro-magnetic vibration energy harvester due to complexity of this mechatronic system. The presented approach of simulation modeling is based on complex FEM analyses in Maxwell environment and it provides useful tool for precise simulation modeling of developed energy harvesting applications.
[klicova_slova_en] => FEM, energy harvesting, simulation
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[nazev] => Computational Modelling of the Shape Deviations of the Sphere Surfaces of Ceramic Heads of Hip Joint Replacement
[nazev_orig] => Computational Modelling of the Shape Deviations of the Sphere Surfaces of Ceramic Heads of Hip Joint Replacement
[duvernost_udaju_id] => S
[popis] => The problem of the damage of the bioimplants is very important today. In the endoprosthesis surgery there is a large percentage of implant defects, which cause the failure of the whole prosthesis. One kind of the total hip replacement functionality loss is acetabular cup pull-off from pelvis bone. This paper is aimed at manufacture perturbations (shape deviations) analysis as one of the possible reasons to this kind of failure. Dimension and of geometry manufacturing perturbations (roundness) were analyzed in detail. It was found, that these perturbations affect considered values of contact pressure and frictional moment. Contact pressure and frictional moment are quantities affecting replacement success and durability.
[popis_orig] => The problem of the damage of the bioimplants is very important today. In the endoprosthesis surgery there is a large percentage of implant defects, which cause the failure of the whole prosthesis. One kind of the total hip replacement functionality loss is acetabular cup pull-off from pelvis bone. This paper is aimed at manufacture perturbations (shape deviations) analysis as one of the possible reasons to this kind of failure. Dimension and of geometry manufacturing perturbations (roundness) were analyzed in detail. It was found, that these perturbations affect considered values of contact pressure and frictional moment. Contact pressure and frictional moment are quantities affecting replacement success and durability.
[klicova_slova] => total hip replacement, shape deviations, roundness, contact pressure, frictional moment
[klicova_slova_orig] => total hip replacement, shape deviations, roundness, contact pressure, frictional moment
[url] =>
[oecd_obor_id] => 20301
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[odpovedny_utvar_nazev] => Ústav mechaniky těles, mechatroniky a biomechaniky
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[originalni_jazyk] => en
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[schvaleno] => 2019-08-07
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[slozka_id] =>
[posledni_diagnostika] =>
[vycet_osob] => FUIS, V.; KOUKAL, M.; FLORIAN, Z.; JANÍČEK, P.
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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 978-3-319-00845-5 ISSN 1680-0737
[identifikator_popis] => ISBN - XI Mediterranean Conference on Medical and Biological Engineering and Computing 2013 ISSN - IFMBE Proceedings (FR)
[riv_dodavka_id] => 494
[riv_dodavka_oznaceni] => RIV14-MSM-26210___
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[citace_text] => FUIS, V.; KOUKAL, M.; FLORIAN, Z.; JANÍČEK, P. Computational Modelling of the Shape Deviations of the Sphere Surfaces of Ceramic Heads of Hip Joint Replacement. In XI Mediterranean Conference on Medical and Biological Engineering and Computing 2013. IFMBE Proceedings. IFMBE Proceedings. Seville: Springer, 2013. p. 89-92. ISBN: 978-3-319-00845-5. ISSN: 1680-0737.
[citace_html] => FUIS, V.; KOUKAL, M.; FLORIAN, Z.; JANÍČEK, P. Computational Modelling of the Shape Deviations of the Sphere Surfaces of Ceramic Heads of Hip Joint Replacement. In XI Mediterranean Conference on Medical and Biological Engineering and Computing 2013. IFMBE Proceedings. IFMBE Proceedings. Seville: Springer, 2013. p. 89-92. ISBN: 978-3-319-00845-5. ISSN: 1680-0737.
[citace_rtf] =>
[citace_bibtex] => @inproceedings{BUT104713,
author="Vladimír {Fuis} and Milan {Koukal} and Zdeněk {Florian} and Přemysl {Janíček}",
title="Computational Modelling of the Shape Deviations of the Sphere Surfaces of Ceramic Heads of Hip Joint Replacement",
booktitle="XI Mediterranean Conference on Medical and Biological Engineering and Computing 2013",
year="2013",
series="IFMBE Proceedings",
journal="IFMBE Proceedings",
volume="41",
number="Vol. 41",
pages="89--92",
publisher="Springer",
address="Seville",
doi="10.1007/978-3-319-00846-2\{_}22",
isbn="978-3-319-00845-5",
issn="1680-0737"
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[nazev_en] => Computational Modelling of the Shape Deviations of the Sphere Surfaces of Ceramic Heads of Hip Joint Replacement
[popis_en] => The problem of the damage of the bioimplants is very important today. In the endoprosthesis surgery there is a large percentage of implant defects, which cause the failure of the whole prosthesis. One kind of the total hip replacement functionality loss is acetabular cup pull-off from pelvis bone. This paper is aimed at manufacture perturbations (shape deviations) analysis as one of the possible reasons to this kind of failure. Dimension and of geometry manufacturing perturbations (roundness) were analyzed in detail. It was found, that these perturbations affect considered values of contact pressure and frictional moment. Contact pressure and frictional moment are quantities affecting replacement success and durability.
[klicova_slova_en] => total hip replacement, shape deviations, roundness, contact pressure, frictional moment
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[popis] => A geometrically simplified plane elasticity problem of a finitesmall crack emanating from a thin interfacial zone surrounding the circularinclusion situated in the finite bounded domain is investigated. The crack isarbitrarily oriented and modelled using the distribution dislocation technique.This model represents the inner solution of the studied problem. Thecorresponding fundamental solution is based on the application ofMuskhelishvili complex potentials in the form of the Laurent series. Thecoefficients of the series are evaluated from the compatibility conditionsalong the interfaces of the inclusion, the interfacial zone and the enclosingmatrix. The fundamental solution is also used in the solution of the boundaryintegral method approximating the stress and strain relations of the so-calledouter solution. The asymptotic analysis at the point of the crack initiationcombines the inner and the outer solution and results in the evaluation of thestress intensity factors of the crack tip, which lies in the matrix. Thetopological derivative is subsequently used to approximate the energy releaserate field associated with the perturbing crack in the matrix. The extremevalues of the energy release rate allow one to assess the crack path directionof the initiated microcrack.
[popis_orig] => A geometrically simplified plane elasticity problem of a finitesmall crack emanating from a thin interfacial zone surrounding the circularinclusion situated in the finite bounded domain is investigated. The crack isarbitrarily oriented and modelled using the distribution dislocation technique.This model represents the inner solution of the studied problem. Thecorresponding fundamental solution is based on the application ofMuskhelishvili complex potentials in the form of the Laurent series. Thecoefficients of the series are evaluated from the compatibility conditionsalong the interfaces of the inclusion, the interfacial zone and the enclosingmatrix. The fundamental solution is also used in the solution of the boundaryintegral method approximating the stress and strain relations of the so-calledouter solution. The asymptotic analysis at the point of the crack initiationcombines the inner and the outer solution and results in the evaluation of thestress intensity factors of the crack tip, which lies in the matrix. Thetopological derivative is subsequently used to approximate the energy releaserate field associated with the perturbing crack in the matrix. The extremevalues of the energy release rate allow one to assess the crack path directionof the initiated microcrack.
[klicova_slova] => Crack path assessment; Complex potentials; Interfacial zone;Circular inclusion; Fundamental solution; Topological derivative
[klicova_slova_orig] => Crack path assessment; Complex potentials; Interfacial zone;Circular inclusion; Fundamental solution; Topological derivative
[url] => https://www.fracturae.com/index.php/fis/article/view/2297/2443
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[kod_doi] => 10.3221/IGF-ESIS.48.48
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[citace_text] => PROFANT, T.; HRSTKA, M.; KLUSÁK, J. Microcrack interaction with circular inclusion and interfacial zone. Fracture and structural integrity, 2019, vol. 13, no. 48, p. 503-512. ISSN: 1971-8993.
[citace_html] => PROFANT, T.; HRSTKA, M.; KLUSÁK, J. Microcrack interaction with circular inclusion and interfacial zone. Fracture and structural integrity, 2019, vol. 13, no. 48, p. 503-512. ISSN: 1971-8993.
[citace_rtf] =>
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author="Tomáš {Profant} and Miroslav {Hrstka} and Jan {Klusák}",
title="Microcrack interaction with circular inclusion and interfacial zone",
journal="Fracture and structural integrity",
year="2019",
volume="13",
number="48",
pages="503--512",
doi="10.3221/IGF-ESIS.48.48",
url="https://www.fracturae.com/index.php/fis/article/view/2297/2443"
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[nazev_en] => Microcrack interaction with circular inclusion and interfacial zone
[popis_en] => A geometrically simplified plane elasticity problem of a finitesmall crack emanating from a thin interfacial zone surrounding the circularinclusion situated in the finite bounded domain is investigated. The crack isarbitrarily oriented and modelled using the distribution dislocation technique.This model represents the inner solution of the studied problem. Thecorresponding fundamental solution is based on the application ofMuskhelishvili complex potentials in the form of the Laurent series. Thecoefficients of the series are evaluated from the compatibility conditionsalong the interfaces of the inclusion, the interfacial zone and the enclosingmatrix. The fundamental solution is also used in the solution of the boundaryintegral method approximating the stress and strain relations of the so-calledouter solution. The asymptotic analysis at the point of the crack initiationcombines the inner and the outer solution and results in the evaluation of thestress intensity factors of the crack tip, which lies in the matrix. Thetopological derivative is subsequently used to approximate the energy releaserate field associated with the perturbing crack in the matrix. The extremevalues of the energy release rate allow one to assess the crack path directionof the initiated microcrack.
[klicova_slova_en] => Crack path assessment; Complex potentials; Interfacial zone;Circular inclusion; Fundamental solution; Topological derivative
[vysledek_datum] => 2019-01-04T00:00:00+01:00
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[nazev] => Crack Protective Layered Architecture of Lead-Free Piezoelectric Energy Harvester in Bistable Configuration
[nazev_orig] => Crack Protective Layered Architecture of Lead-Free Piezoelectric Energy Harvester in Bistable Configuration
[duvernost_udaju_id] => S
[popis] => Kinetic piezoelectric energy harvesters are used to power up ultra-low power devices without batteries as an alternative and eco-friendly source of energy. This paper deals with a novel design of a lead-free multilayer energy harvester based on BaTiO3 ceramics. This material is very brittle and might be cracked in small amplitudes of oscillations. However, the main aim of our development is the design of a crack protective layered architecture that protects an energy harvesting device in very high amplitudes of oscillations. This architecture is described and optimized for chosen geometry and the resulted one degree of freedom coupled electromechanical model is derived. This model could be used in bistable configuration and the model is extended about the nonlinear stiffness produced by auxiliary magnets. The complex bistable vibration energy harvester is simulated to predict operation in a wide range of frequency excitation. It should demonstrate typical operation of designed beam and a stress intensity factor was calculated for layers. The whole system, without presence of cracks, was simulated with an excitation acceleration of amplitude up to 1g. The maximal obtained power was around 2 mW at the frequency around 40 Hz with a maximal tip displacement 7.5 mm. The maximal operating amplitude of this novel design was calculated around 10 mm which is 10-times higher than without protective layers.
[popis_orig] => Kinetic piezoelectric energy harvesters are used to power up ultra-low power devices without batteries as an alternative and eco-friendly source of energy. This paper deals with a novel design of a lead-free multilayer energy harvester based on BaTiO3 ceramics. This material is very brittle and might be cracked in small amplitudes of oscillations. However, the main aim of our development is the design of a crack protective layered architecture that protects an energy harvesting device in very high amplitudes of oscillations. This architecture is described and optimized for chosen geometry and the resulted one degree of freedom coupled electromechanical model is derived. This model could be used in bistable configuration and the model is extended about the nonlinear stiffness produced by auxiliary magnets. The complex bistable vibration energy harvester is simulated to predict operation in a wide range of frequency excitation. It should demonstrate typical operation of designed beam and a stress intensity factor was calculated for layers. The whole system, without presence of cracks, was simulated with an excitation acceleration of amplitude up to 1g. The maximal obtained power was around 2 mW at the frequency around 40 Hz with a maximal tip displacement 7.5 mm. The maximal operating amplitude of this novel design was calculated around 10 mm which is 10-times higher than without protective layers.
[klicova_slova] => energy harvesting; piezoelectrics; bimorph; lead free ceramic; bistable energy harvester; nonlinear resonators
[klicova_slova_orig] => energy harvesting; piezoelectrics; bimorph; lead free ceramic; bistable energy harvester; nonlinear resonators
[url] => https://www.mdpi.com/1424-8220/20/20/5808
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[citace_text] => RUBEŠ, O.; MACHŮ, Z.; ŠEVEČEK, O.; HADAŠ, Z. Crack Protective Layered Architecture of Lead-Free Piezoelectric Energy Harvester in Bistable Configuration. SENSORS, 2020, vol. 20, no. 20, p. 1-18. ISSN: 1424-8220.
[citace_html] => RUBEŠ, O.; MACHŮ, Z.; ŠEVEČEK, O.; HADAŠ, Z. Crack Protective Layered Architecture of Lead-Free Piezoelectric Energy Harvester in Bistable Configuration. SENSORS, 2020, vol. 20, no. 20, p. 1-18. ISSN: 1424-8220.
[citace_rtf] =>
[citace_bibtex] => @article{BUT165594,
author="Ondřej {Rubeš} and Zdeněk {Machů} and Oldřich {Ševeček} and Zdeněk {Hadaš}",
title="Crack Protective Layered Architecture of Lead-Free Piezoelectric Energy Harvester in Bistable Configuration",
journal="SENSORS",
year="2020",
volume="20",
number="20",
pages="1--18",
doi="10.3390/s20205808",
url="https://www.mdpi.com/1424-8220/20/20/5808"
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[nazev_en] => Crack Protective Layered Architecture of Lead-Free Piezoelectric Energy Harvester in Bistable Configuration
[popis_en] => Kinetic piezoelectric energy harvesters are used to power up ultra-low power devices without batteries as an alternative and eco-friendly source of energy. This paper deals with a novel design of a lead-free multilayer energy harvester based on BaTiO3 ceramics. This material is very brittle and might be cracked in small amplitudes of oscillations. However, the main aim of our development is the design of a crack protective layered architecture that protects an energy harvesting device in very high amplitudes of oscillations. This architecture is described and optimized for chosen geometry and the resulted one degree of freedom coupled electromechanical model is derived. This model could be used in bistable configuration and the model is extended about the nonlinear stiffness produced by auxiliary magnets. The complex bistable vibration energy harvester is simulated to predict operation in a wide range of frequency excitation. It should demonstrate typical operation of designed beam and a stress intensity factor was calculated for layers. The whole system, without presence of cracks, was simulated with an excitation acceleration of amplitude up to 1g. The maximal obtained power was around 2 mW at the frequency around 40 Hz with a maximal tip displacement 7.5 mm. The maximal operating amplitude of this novel design was calculated around 10 mm which is 10-times higher than without protective layers.
[klicova_slova_en] => energy harvesting; piezoelectrics; bimorph; lead free ceramic; bistable energy harvester; nonlinear resonators
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