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[nazev] => Mesh Wi-Fi Infrastructure for Multi-agent Robotic System
[nazev_orig] => Mesh Wi-Fi Infrastructure for Multi-agent Robotic System
[duvernost_udaju_id] => S
[popis] => A communication infrastructure is an important part of any multi-agent system. This paper introduces a movable Wi-Fi mesh network implementation, while keeping in mind that not all devices are Wi-Fi mesh enabled. The main goal was to experimentally compare the implementation to regular Wi-Fi access point application. The results show that it is possible to use such network, while gaining in operational range. Disadvantages were also found, mainly in response time, but connection could still be held. The resulting system enables usage in both centralized and decentralized manner.
[popis_orig] => A communication infrastructure is an important part of any multi-agent system. This paper introduces a movable Wi-Fi mesh network implementation, while keeping in mind that not all devices are Wi-Fi mesh enabled. The main goal was to experimentally compare the implementation to regular Wi-Fi access point application. The results show that it is possible to use such network, while gaining in operational range. Disadvantages were also found, mainly in response time, but connection could still be held. The resulting system enables usage in both centralized and decentralized manner.
[klicova_slova] => Wi-Fi mesh, multi-agent system, multi-robot system, robot, communication, ROS, robot operating system, no signal coverage, decentralized system
[klicova_slova_orig] => Wi-Fi mesh, multi-agent system, multi-robot system, robot, communication, ROS, robot operating system, no signal coverage, decentralized system
[url] => https://ieeexplore.ieee.org/document/9286615
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[citace_text] => VENGLÁŘ, V.; KRÁLÍK, J.; CHIN H.-L.; CHEN, K.-S. Mesh Wi-Fi Infrastructure for Multi-agent Robotic System. In Proceedings of the 2020 19th International Conference on Mechatronics – Mechatronika (ME). 1st edition. Prague, Czech Republic: IEEE, 2020. p. 1-4. ISBN: 978-1-7281-5600-2.
[citace_html] => VENGLÁŘ, V.; KRÁLÍK, J.; CHIN H.-L.; CHEN, K.-S. Mesh Wi-Fi Infrastructure for Multi-agent Robotic System. In Proceedings of the 2020 19th International Conference on Mechatronics – Mechatronika (ME). 1st edition. Prague, Czech Republic: IEEE, 2020. p. 1-4. ISBN: 978-1-7281-5600-2.
[citace_rtf] =>
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author="VENGLÁŘ, V. and KRÁLÍK, J. and CHIN H.-L. and CHEN, K.-S.",
title="Mesh Wi-Fi Infrastructure for Multi-agent Robotic System",
booktitle="Proceedings of the 2020 19th International Conference on Mechatronics – Mechatronika (ME)",
year="2020",
series="1st edition",
pages="1--4",
publisher="IEEE",
address="Prague, Czech Republic",
doi="10.1109/ME49197.2020.9286615",
isbn="978-1-7281-5600-2",
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[nazev_en] => Mesh Wi-Fi Infrastructure for Multi-agent Robotic System
[popis_en] => A communication infrastructure is an important part of any multi-agent system. This paper introduces a movable Wi-Fi mesh network implementation, while keeping in mind that not all devices are Wi-Fi mesh enabled. The main goal was to experimentally compare the implementation to regular Wi-Fi access point application. The results show that it is possible to use such network, while gaining in operational range. Disadvantages were also found, mainly in response time, but connection could still be held. The resulting system enables usage in both centralized and decentralized manner.
[klicova_slova_en] => Wi-Fi mesh, multi-agent system, multi-robot system, robot, communication, ROS, robot operating system, no signal coverage, decentralized system
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[nazev] => ODIN-Optimising Design for Inspection
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[duvernost_udaju_id] => S
[popis] => Continuous monitoring of critical aerospace structures by integrating ultrasonic wave based non-destructive evaluation (NDE), energy harvesting and wireless sensor technologies at the design conception phase.
Optimization (of sensors and structures), computational modelling, advanced signal processing and advanced design approaches will be integrated to produce a novel framework, design tools and guidelines for the delivery of the first generation of self-sensing aircraft capable of delivering accurate structural prognosis.
[popis_orig] => Continuous monitoring of critical aerospace structures by integrating ultrasonic wave based non-destructive evaluation (NDE), energy harvesting and wireless sensor technologies at the design conception phase.
Optimization (of sensors and structures), computational modelling, advanced signal processing and advanced design approaches will be integrated to produce a novel framework, design tools and guidelines for the delivery of the first generation of self-sensing aircraft capable of delivering accurate structural prognosis.
[klicova_slova] => energy harvesting, vibration, sensing
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[url] =>
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[citace_text] => HADAŠ, Z. ODIN-Optimising Design for Inspection. 2019. 15 p.
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author="Zdeněk {Hadaš}",
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[nazev] => Effect of Femoral Neck Axis Angles on Stress and Strain in Prolonged Femur: FE Study
[nazev_orig] => Effect of Femoral Neck Axis Angles on Stress and Strain in Prolonged Femur: FE Study
[duvernost_udaju_id] => S
[popis] => The presented study deals with the influence of the two femoral neck angles – the anteversion angle
and the angle of inclination – on stress and strain in femur lengthened with the intramedullary distraction nail.
Five variants of geometry model of femur were created from the CT data for the purpose of this study. All
femurs were scaled to the same length. The range of angles of the specimens used in this study was 0.2 °–27.8 °
for the angle of anteversion and 114.0 °–141.6 ° for the inclination angle. The osteotomy and lengthening by
30 mm were simulated for each variant of geometry and the intramedullary distraction nail and screws were
then inserted. The influence of femoral neck angles was investigated on the stress in the nail, the strain intensity
in callus and the deformation along the mechanical axis. The results suggest the influence of the angle
of inclination on the max. stress in nail and the influence of the anteversion angle on the max. strain intensity
in callus and the deformation along the mechanical axis.
[popis_orig] => The presented study deals with the influence of the two femoral neck angles – the anteversion angle
and the angle of inclination – on stress and strain in femur lengthened with the intramedullary distraction nail.
Five variants of geometry model of femur were created from the CT data for the purpose of this study. All
femurs were scaled to the same length. The range of angles of the specimens used in this study was 0.2 °–27.8 °
for the angle of anteversion and 114.0 °–141.6 ° for the inclination angle. The osteotomy and lengthening by
30 mm were simulated for each variant of geometry and the intramedullary distraction nail and screws were
then inserted. The influence of femoral neck angles was investigated on the stress in the nail, the strain intensity
in callus and the deformation along the mechanical axis. The results suggest the influence of the angle
of inclination on the max. stress in nail and the influence of the anteversion angle on the max. strain intensity
in callus and the deformation along the mechanical axis.
[klicova_slova] => Limb lengthening; Femoral neck angles; Distraction osteogenesis; Intramedullary distraction nail; FEM
[klicova_slova_orig] => Limb lengthening; Femoral neck angles; Distraction osteogenesis; Intramedullary distraction nail; FEM
[url] => https://www.engmech.cz/im/im/download/EM2020_proceedings.pdf
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[identifikator] => ISBN 978-80-214-5896-3
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[citace_text] => KONVALINKA, J. Effect of Femoral Neck Axis Angles on Stress and Strain in Prolonged Femur: FE Study. In Engineering Mechanics 2020. 26. Brno: Brno University of Technology, Institute of Solid Mechanics, Mechatronics and Biomechanics, 2020. p. 286-289. ISBN: 978-80-214-5896-3.
[citace_html] => KONVALINKA, J. Effect of Femoral Neck Axis Angles on Stress and Strain in Prolonged Femur: FE Study. In Engineering Mechanics 2020. 26. Brno: Brno University of Technology, Institute of Solid Mechanics, Mechatronics and Biomechanics, 2020. p. 286-289. ISBN: 978-80-214-5896-3.
[citace_rtf] =>
[citace_bibtex] => @inproceedings{BUT168909,
author="Jan {Konvalinka}",
title="Effect of Femoral Neck Axis Angles on Stress and Strain in Prolonged Femur: FE Study",
booktitle="Engineering Mechanics 2020",
year="2020",
series="26",
number="1",
pages="286--289",
publisher="Brno University of Technology, Institute of Solid Mechanics, Mechatronics and Biomechanics",
address="Brno",
doi="10.21495/5896-3-286",
isbn="978-80-214-5896-3",
url="https://www.engmech.cz/im/im/download/EM2020_proceedings.pdf"
}
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[poznamka_metriky] =>
[nazev_en] => Effect of Femoral Neck Axis Angles on Stress and Strain in Prolonged Femur: FE Study
[popis_en] => The presented study deals with the influence of the two femoral neck angles – the anteversion angle
and the angle of inclination – on stress and strain in femur lengthened with the intramedullary distraction nail.
Five variants of geometry model of femur were created from the CT data for the purpose of this study. All
femurs were scaled to the same length. The range of angles of the specimens used in this study was 0.2 °–27.8 °
for the angle of anteversion and 114.0 °–141.6 ° for the inclination angle. The osteotomy and lengthening by
30 mm were simulated for each variant of geometry and the intramedullary distraction nail and screws were
then inserted. The influence of femoral neck angles was investigated on the stress in the nail, the strain intensity
in callus and the deformation along the mechanical axis. The results suggest the influence of the angle
of inclination on the max. stress in nail and the influence of the anteversion angle on the max. strain intensity
in callus and the deformation along the mechanical axis.
[klicova_slova_en] => Limb lengthening; Femoral neck angles; Distraction osteogenesis; Intramedullary distraction nail; FEM
[vysledek_datum] => 2020-11-24T00:00:00+01:00
)
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(
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[nazev] => Biomechanical Assessment of Peri-Implant Bone Tissue: Effect of Material Model Homogeneity on Strain Distribution in Mandible
[nazev_orig] => Biomechanical Assessment of Peri-Implant Bone Tissue: Effect of Material Model Homogeneity on Strain Distribution in Mandible
[duvernost_udaju_id] => S
[popis] => The aim of this study wasto compare mechanical performancesof bone-implant interactionwhen different material models were used in thecomputational modeling process. Specifically,homogeneous andnon-homogeneous material modelsofmandibularbone tissuewere scrutinized. Peri-implant region of the mandible was analyzedusing three variants of cancellous bone material model. The first two variantswere based on the assumption of perfect material homogeneity (with various elastic constants), the third one was assumed to be nonhomogeneousandbased onCT image data. The results indicated that the strain intensities in cancellous bone tissue wereconcentrated in the regionof implantapexregardless of the variant.Thecharacter of strains in the peri-implantregion (up to 0.1mm from the implant) is influenced dominantly by the geometry of the selected dental implant than by the used material model variant. To perform more credible analysis of local strains in the peri-implant region, it is preferable to adopt material model based on CT images.
[popis_orig] => The aim of this study wasto compare mechanical performancesof bone-implant interactionwhen different material models were used in thecomputational modeling process. Specifically,homogeneous andnon-homogeneous material modelsofmandibularbone tissuewere scrutinized. Peri-implant region of the mandible was analyzedusing three variants of cancellous bone material model. The first two variantswere based on the assumption of perfect material homogeneity (with various elastic constants), the third one was assumed to be nonhomogeneousandbased onCT image data. The results indicated that the strain intensities in cancellous bone tissue wereconcentrated in the regionof implantapexregardless of the variant.Thecharacter of strains in the peri-implantregion (up to 0.1mm from the implant) is influenced dominantly by the geometry of the selected dental implant than by the used material model variant. To perform more credible analysis of local strains in the peri-implant region, it is preferable to adopt material model based on CT images.
[klicova_slova] => Peri-implant bone; Dental implant; Computational modeling; FEM
[klicova_slova_orig] => Peri-implant bone; Dental implant; Computational modeling; FEM
[url] => https://www.engmech.cz/im/doc/EM2020_proceedings.pdf
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[vycet_osob] => THOMKOVÁ, B.; MARCIÁN, P.; BORÁK, L.
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[kod_doi] => 10.21495/5896-3-484
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[identifikator] => ISBN 978-80-214-5896-3
[identifikator_popis] => ISBN - Engineering Mechanics 2020
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[citace_text] => THOMKOVÁ, B.; MARCIÁN, P.; BORÁK, L. Biomechanical Assessment of Peri-Implant Bone Tissue: Effect of Material Model Homogeneity on Strain Distribution in Mandible. In Engineering Mechanics 2020. 2020. p. 484-487. ISBN: 978-80-214-5896-3.
[citace_html] => THOMKOVÁ, B.; MARCIÁN, P.; BORÁK, L. Biomechanical Assessment of Peri-Implant Bone Tissue: Effect of Material Model Homogeneity on Strain Distribution in Mandible. In Engineering Mechanics 2020. 2020. p. 484-487. ISBN: 978-80-214-5896-3.
[citace_rtf] =>
[citace_bibtex] => @inproceedings{BUT169001,
author="Barbora {Thomková} and Petr {Marcián} and Libor {Borák}",
title="Biomechanical Assessment of Peri-Implant Bone Tissue: Effect of Material Model Homogeneity on Strain Distribution in Mandible",
booktitle="Engineering Mechanics 2020",
year="2020",
pages="484--487",
doi="10.21495/5896-3-484",
isbn="978-80-214-5896-3",
url="https://www.engmech.cz/im/doc/EM2020_proceedings.pdf"
}
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[poznamka_metriky] =>
[nazev_en] => Biomechanical Assessment of Peri-Implant Bone Tissue: Effect of Material Model Homogeneity on Strain Distribution in Mandible
[popis_en] => The aim of this study wasto compare mechanical performancesof bone-implant interactionwhen different material models were used in thecomputational modeling process. Specifically,homogeneous andnon-homogeneous material modelsofmandibularbone tissuewere scrutinized. Peri-implant region of the mandible was analyzedusing three variants of cancellous bone material model. The first two variantswere based on the assumption of perfect material homogeneity (with various elastic constants), the third one was assumed to be nonhomogeneousandbased onCT image data. The results indicated that the strain intensities in cancellous bone tissue wereconcentrated in the regionof implantapexregardless of the variant.Thecharacter of strains in the peri-implantregion (up to 0.1mm from the implant) is influenced dominantly by the geometry of the selected dental implant than by the used material model variant. To perform more credible analysis of local strains in the peri-implant region, it is preferable to adopt material model based on CT images.
[klicova_slova_en] => Peri-implant bone; Dental implant; Computational modeling; FEM
[vysledek_datum] => 2020-11-24T00:00:00+01:00
)
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[nazev] => Metodika diagnostiky oběžných kol vodních turbín
[nazev_orig] => Metodika diagnostiky oběžných kol vodních turbín
[duvernost_udaju_id] => S
[popis] => Tato metodika se zabývá diagnostikou a stanovením životnosti oběžných kol Francisových vodních turbín namáháných Kármánovými víry, které vznikají na odtokové hraně lopatky. Rozvíjí dva přístupy k posouzení vzniku porušení na lopatce oběžného kola – přístup A, který je založen na kombinaci CFD a strukturální analýzy v čase a přímé simulaci provozních podmínek na lopatce a přístup B, který kombinuje CFD se strukturální analýzou v ustáleném stavu („steady state“) a provádí nepřímou simulaci provozních podmínek na lopatce.
Metodika řeší namáhání pouze od Kármánových vírů které vznikají na odtokové hraně lopatky. V rámci posuzované vzorové vodní elektrárny bylo toto buzení nejvýznamnější při velmi nízkých výkonech. Je nutno podotknut, že do provozního stavu volnoběhu se stroj dostává při každém startu i odstavení.
[popis_orig] => Tato metodika se zabývá diagnostikou a stanovením životnosti oběžných kol Francisových vodních turbín namáháných Kármánovými víry, které vznikají na odtokové hraně lopatky. Rozvíjí dva přístupy k posouzení vzniku porušení na lopatce oběžného kola – přístup A, který je založen na kombinaci CFD a strukturální analýzy v čase a přímé simulaci provozních podmínek na lopatce a přístup B, který kombinuje CFD se strukturální analýzou v ustáleném stavu („steady state“) a provádí nepřímou simulaci provozních podmínek na lopatce.
Metodika řeší namáhání pouze od Kármánových vírů které vznikají na odtokové hraně lopatky. V rámci posuzované vzorové vodní elektrárny bylo toto buzení nejvýznamnější při velmi nízkých výkonech. Je nutno podotknut, že do provozního stavu volnoběhu se stroj dostává při každém startu i odstavení.
[klicova_slova] => Francisova turbína; Karmánová vírová stezka; kavitace; CFD; modální analýza; FEM; kumulace poškození; únavová životnost
[klicova_slova_orig] => Francisova turbína; Karmánová vírová stezka; kavitace; CFD; modální analýza; FEM; kumulace poškození; únavová životnost
[url] =>
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[odpovedny_utvar_nazev] => Ústav mechaniky těles, mechatroniky a biomechaniky
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[originalni_jazyk] => cs
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[schvaleno] => 2021-02-25
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[vycet_osob] => KOTOUL, M.; HABÁN, V.; ŠTEFAN, D.; SKALKA, P.; ŠEVEČEK, O.; LOŠÁK, P.; RUDOLF, P.
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[poznamka] => Rozdělení práv k výsledku se řídí Smlouvou o využití výsledků projektu „NCE DP6 Vývoj diagnostických metod pro charakterizaci klíčových komponent energetických celků“ v rámci programu NCK 1.; smluvní strany: VUT v Brně, Centrum výzkumu Řež s.r.o., ČEZ, a.s., České vysoké učení technické v Praze, Výzkumný a zkušební ústav Plzeň s.r.o. Odpovědná osoba: doc. Ing. Vladimír Habán, Ph.D., Vysoké učení technické v Brně, email: haban@fme.vutbr.cz., tel: 541142337
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[druh_popis] => Metodiky certifikované oprávněným orgánem
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[citace_text] => KOTOUL, M.; HABÁN, V.; ŠTEFAN, D.; SKALKA, P.; ŠEVEČEK, O.; LOŠÁK, P.; RUDOLF, P.: Metodika diagnostiky oběžných kol vodních turbín. (Metodiky certifikované)
[citace_html] => KOTOUL, M.; HABÁN, V.; ŠTEFAN, D.; SKALKA, P.; ŠEVEČEK, O.; LOŠÁK, P.; RUDOLF, P.: Metodika diagnostiky oběžných kol vodních turbín. (Metodiky certifikované)
[citace_rtf] =>
[citace_bibtex] => @misc{BUT169072,
author="Michal {Kotoul} and Vladimír {Habán} and David {Štefan} and Petr {Skalka} and Oldřich {Ševeček} and Petr {Lošák} and Pavel {Rudolf}",
title="Metodika diagnostiky oběžných kol vodních turbín",
year="2020",
note="Certified methodologies"
}
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[poznamka_metriky] =>
[nazev_en] => Methodology of diagnostics of water turbine runners
[popis_en] => This methodology deals with the díagnostics and determination of the service life of the impellers of Francis water turbines subjected to loading due to the Kármán vortices, which arise at the trailing edge of the blade. It develops two approaches to assessing impeller blade failure - Approach A, which is based on a combination of CFD and structural time analysis, and direct simulation of blade operating conditions, and Approach B, which combines CFD with steady state structural analysis and performs an indirect simulation of the operating conditions on the blade.
[klicova_slova_en] => Francis turbine; Kármán vortex street; cavitation; CFD; modal analysis, FEM, damage cumulation, crack, fatigue life
[vysledek_datum] => 2020-11-01T00:00:00+01:00
)
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[nazev] => Effect of load-induced local mechanical strain on peri-implant bone cell activity related to bone resorption and formation in mice: An analysis of histology and strain distributions
[nazev_orig] => Effect of load-induced local mechanical strain on peri-implant bone cell activity related to bone resorption and formation in mice: An analysis of histology and strain distributions
[duvernost_udaju_id] => S
[popis] => The purpose of this study was to investigate the effect of load-induced local mechanical strain on bone cell activity of peri-implant bone in mice. Titanium implants were placed in the maxillae of 13-week-old male C57BL/6J mice and subjected to intermittent 0.15 N, 0.3 N, or 0.6 N loads for 30 min/day for 6 days. The animals were sacrificed 2 days after the final loading. Unloaded mice were used as controls. An animal-specific three-dimensional finite element model was constructed based on morphological data retrieved from in vivo microfocus computed tomography for each mouse to calculate the mechanical strain distribution. Strain distribution images were overlaid on corresponding histological images of the same site in the same animal. The buccal cervical region of the peri-implant bone was predetermined as the region of interest (ROI). Each ROI was divided by four strain intensity levels: 0–20 με, 20–60 με, 60–100 με, and ≥100 με, and the bone histomorphometric parameters were analyzed by the total area of each strain range for all loaded samples. The distance between the calcified front and calcein labeling as a parameter representing the mineral apposition rate was significantly greater in the areas with strain intensity ≥100 με than in the area with strain intensity <100 με, suggesting that the bone formation activity of osteoblasts was locally enhanced by a higher mechanical strain. However, the shrunken osteocytes and the empty osteocyte lacunae were significantly lower in the highest strain area, suggesting that osteoclastogenesis was more retarded in higher strain areas than in lower strain areas. The histomorphometric parameters were not affected geometrically in the unloaded animals, suggesting that the load-induced mechanical strain caused differences in the histomorphometric parameters. Our findings support the hypothesis that bone cell activity related to bone resorption and formation is local strain-dependent on implant loading.
[popis_orig] => The purpose of this study was to investigate the effect of load-induced local mechanical strain on bone cell activity of peri-implant bone in mice. Titanium implants were placed in the maxillae of 13-week-old male C57BL/6J mice and subjected to intermittent 0.15 N, 0.3 N, or 0.6 N loads for 30 min/day for 6 days. The animals were sacrificed 2 days after the final loading. Unloaded mice were used as controls. An animal-specific three-dimensional finite element model was constructed based on morphological data retrieved from in vivo microfocus computed tomography for each mouse to calculate the mechanical strain distribution. Strain distribution images were overlaid on corresponding histological images of the same site in the same animal. The buccal cervical region of the peri-implant bone was predetermined as the region of interest (ROI). Each ROI was divided by four strain intensity levels: 0–20 με, 20–60 με, 60–100 με, and ≥100 με, and the bone histomorphometric parameters were analyzed by the total area of each strain range for all loaded samples. The distance between the calcified front and calcein labeling as a parameter representing the mineral apposition rate was significantly greater in the areas with strain intensity ≥100 με than in the area with strain intensity <100 με, suggesting that the bone formation activity of osteoblasts was locally enhanced by a higher mechanical strain. However, the shrunken osteocytes and the empty osteocyte lacunae were significantly lower in the highest strain area, suggesting that osteoclastogenesis was more retarded in higher strain areas than in lower strain areas. The histomorphometric parameters were not affected geometrically in the unloaded animals, suggesting that the load-induced mechanical strain caused differences in the histomorphometric parameters. Our findings support the hypothesis that bone cell activity related to bone resorption and formation is local strain-dependent on implant loading.
[klicova_slova] => Dental implants; Bone remodeling; Histomorphometry; Osteoblasts; Mechanotransduction; Stress analysis
[klicova_slova_orig] => Dental implants; Bone remodeling; Histomorphometry; Osteoblasts; Mechanotransduction; Stress analysis
[url] => https://www.sciencedirect.com/science/article/pii/S1751616121000618
[oecd_obor_id] => 20903
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[odpovedny_utvar_nazev] => Ústav mechaniky těles, mechatroniky a biomechaniky
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[schvaleno] => 2021-03-23
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[vycet_osob] => OKAWARA, H.; ARAI, Y.; MATSUNO, H.; MARCIÁN, P.; BORÁK, L.; AOKI, K.; WAKABAYASHI, N.
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[kategorie_nazev] => Publikační výsledky
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[identifikator] => ISSN 1751-6161
[identifikator_popis] => ISSN - Journal of the Mechanical Behavior of Biomedical Materials (NL)
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[citace_text] => OKAWARA, H.; ARAI, Y.; MATSUNO, H.; MARCIÁN, P.; BORÁK, L.; AOKI, K.; WAKABAYASHI, N. Effect of load-induced local mechanical strain on peri-implant bone cell activity related to bone resorption and formation in mice: An analysis of histology and strain distributions. Journal of the Mechanical Behavior of Biomedical Materials, 2021, vol. 116, no. 1, p. 104370-104370. ISSN: 1751-6161.
[citace_html] => OKAWARA, H.; ARAI, Y.; MATSUNO, H.; MARCIÁN, P.; BORÁK, L.; AOKI, K.; WAKABAYASHI, N. Effect of load-induced local mechanical strain on peri-implant bone cell activity related to bone resorption and formation in mice: An analysis of histology and strain distributions. Journal of the Mechanical Behavior of Biomedical Materials, 2021, vol. 116, no. 1, p. 104370-104370. ISSN: 1751-6161.
[citace_rtf] =>
[citace_bibtex] => @article{BUT169100,
author="Hisami {Okawara} and Yuki {Arai} and Hitomi {Matsuno} and Petr {Marcián} and Libor {Borák} and Kazuhiro {Aoki} and Noriyuki {WAKABAYASHI}",
title="Effect of load-induced local mechanical strain on peri-implant bone cell activity related to bone resorption and formation in mice: An analysis of histology and strain distributions",
journal="Journal of the Mechanical Behavior of Biomedical Materials",
year="2021",
volume="116",
number="1",
pages="104370--104370",
issn="1751-6161",
url="https://www.sciencedirect.com/science/article/pii/S1751616121000618"
}
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[oecd_tree_oblast_nazev] => 2. Engineering and Technology
[oecd_tree_obor_id] => 20900
[oecd_tree_obor_nazev] => 2.9 Industrial biotechnology
[oecd_tree_podobor_id] => 20903
[oecd_tree_podobor_nazev] => Bioproducts (products that are manufactured using biological material as feedstock) biomaterials, bioplastics, biofuels, bioderived bulk and fine chemicals, bio-derived novel materials
[poznamka_metriky] =>
[nazev_en] => Effect of load-induced local mechanical strain on peri-implant bone cell activity related to bone resorption and formation in mice: An analysis of histology and strain distributions
[popis_en] => The purpose of this study was to investigate the effect of load-induced local mechanical strain on bone cell activity of peri-implant bone in mice. Titanium implants were placed in the maxillae of 13-week-old male C57BL/6J mice and subjected to intermittent 0.15 N, 0.3 N, or 0.6 N loads for 30 min/day for 6 days. The animals were sacrificed 2 days after the final loading. Unloaded mice were used as controls. An animal-specific three-dimensional finite element model was constructed based on morphological data retrieved from in vivo microfocus computed tomography for each mouse to calculate the mechanical strain distribution. Strain distribution images were overlaid on corresponding histological images of the same site in the same animal. The buccal cervical region of the peri-implant bone was predetermined as the region of interest (ROI). Each ROI was divided by four strain intensity levels: 0–20 με, 20–60 με, 60–100 με, and ≥100 με, and the bone histomorphometric parameters were analyzed by the total area of each strain range for all loaded samples. The distance between the calcified front and calcein labeling as a parameter representing the mineral apposition rate was significantly greater in the areas with strain intensity ≥100 με than in the area with strain intensity <100 με, suggesting that the bone formation activity of osteoblasts was locally enhanced by a higher mechanical strain. However, the shrunken osteocytes and the empty osteocyte lacunae were significantly lower in the highest strain area, suggesting that osteoclastogenesis was more retarded in higher strain areas than in lower strain areas. The histomorphometric parameters were not affected geometrically in the unloaded animals, suggesting that the load-induced mechanical strain caused differences in the histomorphometric parameters. Our findings support the hypothesis that bone cell activity related to bone resorption and formation is local strain-dependent on implant loading.
[klicova_slova_en] => Dental implants; Bone remodeling; Histomorphometry; Osteoblasts; Mechanotransduction; Stress analysis
[vysledek_datum] => 2021-01-30T00:00:00+01:00
)
[6] => Array
(
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[nazev] => Piezoelectric PVDF Elements and Systems for Mechanical Engineering Applications
[nazev_orig] => Piezoelectric PVDF Elements and Systems for Mechanical Engineering Applications
[duvernost_udaju_id] => S
[popis] => This paper deals with a review of potential technical applications of piezoelectric polymer systems for Industry 4.0 applications. Polyvinylidene difluoride (PVDF) is a highly non-reactive thermoplastic fluoropolymer produced by the polymerization of vinylidene difluoride. Copolymers of PVDF with beta phase could be used in piezoelectric and triboelectric applications which are presented in this paper. PVDF is a candidate for harvesters and sensors that cannot be realized with piezoceramics or single crystals. Both technical applications for sensing and energy harvesting are presented in this paper. These technologies could be useful in mechanical engineering applications like a strain sensor, strain energy harvesting, vibration energy harvester, load sensing and triboelectric sensors/generators. The opportunity for future usage in Industry 4.0 devices is outlined and experimental results of individual systems are presented.
[popis_orig] => This paper deals with a review of potential technical applications of piezoelectric polymer systems for Industry 4.0 applications. Polyvinylidene difluoride (PVDF) is a highly non-reactive thermoplastic fluoropolymer produced by the polymerization of vinylidene difluoride. Copolymers of PVDF with beta phase could be used in piezoelectric and triboelectric applications which are presented in this paper. PVDF is a candidate for harvesters and sensors that cannot be realized with piezoceramics or single crystals. Both technical applications for sensing and energy harvesting are presented in this paper. These technologies could be useful in mechanical engineering applications like a strain sensor, strain energy harvesting, vibration energy harvester, load sensing and triboelectric sensors/generators. The opportunity for future usage in Industry 4.0 devices is outlined and experimental results of individual systems are presented.
[klicova_slova] => PVDF, piezoelectric, strain, vibration, stack, energy harvesting, sensing, triboelectric
[klicova_slova_orig] => PVDF, piezoelectric, strain, vibration, stack, energy harvesting, sensing, triboelectric
[url] => https://ieeexplore.ieee.org/abstract/document/9286689
[oecd_obor_id] => 20302
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[odpovedny_utvar_nazev] => Ústav mechaniky těles, mechatroniky a biomechaniky
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[originalni_jazyk] => en
[schvalil_id] => 182808
[schvaleno] => 2022-03-03
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[slozka_id] =>
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[vycet_osob] => HADAŠ, Z.; RUBEŠ, O.; TOFEL, P.; MACHŮ, Z.; ŘÍHA, D.; ŠEVEČEK, O.; KAŠTYL, J.; SOBOLA, D.; ČÁSTKOVÁ, K.
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[kod_doi] => 10.1109/ME49197.2020.9286689
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[ins_ts] => 2025-09-22
[upd_ts] => 2025-09-22
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[identifikator] => ISBN 978-1-7281-5602-6
[identifikator_popis] => ISBN - 2020 19th International Conference on Mechatronics - Mechatronika (ME)
[riv_dodavka_id] => 2870
[riv_dodavka_oznaceni] => RIV21-GA0-26210___
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[citace_text] => HADAŠ, Z.; RUBEŠ, O.; TOFEL, P.; MACHŮ, Z.; ŘÍHA, D.; ŠEVEČEK, O.; KAŠTYL, J.; SOBOLA, D.; ČÁSTKOVÁ, K. Piezoelectric PVDF Elements and Systems for Mechanical Engineering Applications. In 2020 19th International Conference on Mechatronics - Mechatronika (ME). Prague, Czech Republic: Institute of Electrical and Electronics Engineers Inc., 2020. p. 1-8. ISBN: 978-1-7281-5602-6.
[citace_html] => HADAŠ, Z.; RUBEŠ, O.; TOFEL, P.; MACHŮ, Z.; ŘÍHA, D.; ŠEVEČEK, O.; KAŠTYL, J.; SOBOLA, D.; ČÁSTKOVÁ, K. Piezoelectric PVDF Elements and Systems for Mechanical Engineering Applications. In 2020 19th International Conference on Mechatronics - Mechatronika (ME). Prague, Czech Republic: Institute of Electrical and Electronics Engineers Inc., 2020. p. 1-8. ISBN: 978-1-7281-5602-6.
[citace_rtf] =>
[citace_bibtex] => @inproceedings{BUT169652,
author="Zdeněk {Hadaš} and Ondřej {Rubeš} and Pavel {Tofel} and Zdeněk {Machů} and David {Říha} and Oldřich {Ševeček} and Jaroslav {Kaštyl} and Dinara {Sobola} and Klára {Částková}",
title="Piezoelectric PVDF Elements and Systems for Mechanical Engineering Applications",
booktitle="2020 19th International Conference on Mechatronics - Mechatronika (ME)",
year="2020",
pages="1--8",
publisher="Institute of Electrical and Electronics Engineers Inc.",
address="Prague, Czech Republic",
doi="10.1109/ME49197.2020.9286689",
isbn="978-1-7281-5602-6",
url="https://ieeexplore.ieee.org/abstract/document/9286689"
}
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[nazev_en] => Piezoelectric PVDF Elements and Systems for Mechanical Engineering Applications
[popis_en] => This paper deals with a review of potential technical applications of piezoelectric polymer systems for Industry 4.0 applications. Polyvinylidene difluoride (PVDF) is a highly non-reactive thermoplastic fluoropolymer produced by the polymerization of vinylidene difluoride. Copolymers of PVDF with beta phase could be used in piezoelectric and triboelectric applications which are presented in this paper. PVDF is a candidate for harvesters and sensors that cannot be realized with piezoceramics or single crystals. Both technical applications for sensing and energy harvesting are presented in this paper. These technologies could be useful in mechanical engineering applications like a strain sensor, strain energy harvesting, vibration energy harvester, load sensing and triboelectric sensors/generators. The opportunity for future usage in Industry 4.0 devices is outlined and experimental results of individual systems are presented.
[klicova_slova_en] => PVDF, piezoelectric, strain, vibration, stack, energy harvesting, sensing, triboelectric
[vysledek_datum] => 2020-12-02T00:00:00+01:00
)
[7] => Array
(
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[vysledek_druh_id] => NEWS
[ex_vysledek_id] => 139745
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[nazev] => FEM analýza OK vodní turbíny s uvažováním zatížení dle CFD výpočtů pro zvolené provozní stavy
[nazev_orig] => FEM analýza OK vodní turbíny s uvažováním zatížení dle CFD výpočtů pro zvolené provozní stavy
[duvernost_udaju_id] => S
[popis] => Tato zpráva se zabývá stanovením životnosti oběžných kol Francisových vodních turbín namáháných Kármánovými víry, které vznikají na odtokové hraně lopatky. Rozvíjí dva přístupy k posouzení vzniku porušení na lopatce oběžného kola – přístup A, který je založen na kombinaci CFD a strukturální analýzy v čase a přímé simulaci provozních podmínek na lopatce a přístup B, který kombinuje CFD se strukturální analýzou v ustáleném stavu („steady state“) a provádí nepřímou simulaci provozních podmínek na lopatce.
[popis_orig] => Tato zpráva se zabývá stanovením životnosti oběžných kol Francisových vodních turbín namáháných Kármánovými víry, které vznikají na odtokové hraně lopatky. Rozvíjí dva přístupy k posouzení vzniku porušení na lopatce oběžného kola – přístup A, který je založen na kombinaci CFD a strukturální analýzy v čase a přímé simulaci provozních podmínek na lopatce a přístup B, který kombinuje CFD se strukturální analýzou v ustáleném stavu („steady state“) a provádí nepřímou simulaci provozních podmínek na lopatce.
[klicova_slova] => Francisova turbína, modální analýza, FEM, kumulace poškození, únavová životnost
[klicova_slova_orig] => Francisova turbína, modální analýza, FEM, kumulace poškození, únavová životnost
[url] =>
[oecd_obor_id] => 20301
[odpovedny_utvar_id] => 157
[odpovedny_utvar_nazev] => Ústav mechaniky těles, mechatroniky a biomechaniky
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[nadrazena_soucast_id] => 4
[nadrazena_soucast_zkratka] => FSI
[nadrazena_soucast_nazev] => Fakulta strojního inženýrství
[originalni_jazyk] => cs
[schvalil_id] => 17485
[schvaleno] => 2021-02-25
[vykazovat_riv] => 1
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[slozka_id] =>
[posledni_diagnostika] =>
[vycet_osob] => KOTOUL, M.; ŠEVEČEK, O.; LOŠÁK, P.; SKALKA, P.
[pocet_tvurcu] => 4
[tvurci_ids] =>
[poznamka] => Rozdělení práv k výsledku se řídí Smlouvou o využití výsledků projektu „NCE DP6 Vývoj diagnostických metod pro charakterizaci klíčových komponent energetických celků“ v rámci programu NCK 1.; smluvní strany: VUT v Brně, Centrum výzkumu Řež s.r.o., ČEZ, a.s., České vysoké učení technické v Praze, Výzkumný a zkušební ústav Plzeň s.r.o. Odpovědná osoba: doc. Ing. Vladimír Habán, Ph.D., Vysoké učení technické v Brně, email: haban@fme.vutbr.cz., tel: 541142337
[typ_nazev] =>
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[prvni_autor] =>
[korespondencni_autor] =>
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[znamka] =>
[kategorie_nazev] => Ostatní
[druh_nazev] => Zpráva odborná
[druh_popis] =>
[stav] => Schválený
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[ins_ts] => 2025-09-22
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[riv_dodavka_id] => 2652
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[citace_text] => KOTOUL, M.; ŠEVEČEK, O.; LOŠÁK, P.; SKALKA, P. FEM analýza OK vodní turbíny s uvažováním zatížení dle CFD výpočtů pro zvolené provozní stavy. Brno: 2020. 35 s.
[citace_html] => KOTOUL, M.; ŠEVEČEK, O.; LOŠÁK, P.; SKALKA, P. FEM analýza OK vodní turbíny s uvažováním zatížení dle CFD výpočtů pro zvolené provozní stavy. Brno: 2020. 35 s.
[citace_rtf] =>
[citace_bibtex] => @misc{BUT169854,
author="Michal {Kotoul} and Oldřich {Ševeček} and Petr {Lošák} and Petr {Skalka}",
title="FEM analýza OK vodní turbíny s uvažováním zatížení dle CFD výpočtů pro zvolené provozní stavy",
year="2020",
pages="35",
address="Brno"
}
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[nazev_en] => FEM analysis of turbine impeller with consideration of loading obtained by CFD computations for selected operating conditions
[popis_en] => This report deals with the determination of the service life of the impellers of Francis water turbines subjected to loading due to the Kármán vortices, which arise at the trailing edge of the blade. It develops two approaches to assessing impeller blade failure - Approach A, which is based on a combination of CFD and structural time analysis, and direct simulation of blade operating conditions, and Approach B, which combines CFD with steady state structural analysis and performs an indirect simulation of the operating conditions on the blade.
[klicova_slova_en] => Francis turbine, modal analysis, FEM, damage cumulation, crack, fatigue life
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[8] => Array
(
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[ex_vysledek_id] => 139744
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[nazev] => Determination of Ramberg-Osgood approximation for estimation of low- temperature fracture toughness.
[nazev_orig] => Determination of Ramberg-Osgood approximation for estimation of low- temperature fracture toughness.
[duvernost_udaju_id] => S
[popis] => his article presents a new method for determination of parameters of the Ramberg-Osgood (R-O) approxi-mation of the tensile diagram based on the loading-frame displacement. This procedure was successfully verified on thesamples of the high strength steel OCHN3MFA tested at various temperatures with records of both the extensometer elon-gation and the load-frame displacement. The method can be used in the model for prediction of theKIc-value based onthe critical strain local approach. The parameters of the R-O approximation obtained from the extensometer-controlledand the load-frame controlled tests are in a very good agreement. Moreover, the experimentalKIc-value at the cryogenictemperature of 77 K and the theoretical one predicted using the loading-frame displacement data are practically identical.
[popis_orig] => his article presents a new method for determination of parameters of the Ramberg-Osgood (R-O) approxi-mation of the tensile diagram based on the loading-frame displacement. This procedure was successfully verified on thesamples of the high strength steel OCHN3MFA tested at various temperatures with records of both the extensometer elon-gation and the load-frame displacement. The method can be used in the model for prediction of theKIc-value based onthe critical strain local approach. The parameters of the R-O approximation obtained from the extensometer-controlledand the load-frame controlled tests are in a very good agreement. Moreover, the experimentalKIc-value at the cryogenictemperature of 77 K and the theoretical one predicted using the loading-frame displacement data are practically identical.
[klicova_slova] => Ramberg-Osgood approximation, fracture toughness, cryogenic temperature, tensile test
[klicova_slova_orig] => Ramberg-Osgood approximation, fracture toughness, cryogenic temperature, tensile test
[url] =>
[oecd_obor_id] => 20501
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[odpovedny_utvar_nazev] => Ústav fyzikálního inženýrství
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[vycet_osob] => ŠANDERA, P.; HORNÍKOVÁ, J.; KIANICOVÁ, M.; DLOUHÝ, I.; POKLUDA, J.
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[kod_doi] => 10.1063/5.0033973
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[identifikator] => ISBN 978-0-7354-4045-6 ISSN 0094-243X
[identifikator_popis] => ISBN - Fracture and Damage Mechanics ISSN - AIP conference proceedings (US)
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[citace_text] => ŠANDERA, P.; HORNÍKOVÁ, J.; KIANICOVÁ, M.; DLOUHÝ, I.; POKLUDA, J. Determination of Ramberg-Osgood approximation for estimation of low- temperature fracture toughness. In Fracture and Damage Mechanics. AIP conference proceedings. AIP Publishing LLC., 2020. no. 1, p. 020024-1 (020024-6 p.)ISBN: 978-0-7354-4045-6. ISSN: 1551-7616.
[citace_html] => ŠANDERA, P.; HORNÍKOVÁ, J.; KIANICOVÁ, M.; DLOUHÝ, I.; POKLUDA, J. Determination of Ramberg-Osgood approximation for estimation of low- temperature fracture toughness. In Fracture and Damage Mechanics. AIP conference proceedings. AIP Publishing LLC., 2020. no. 1, p. 020024-1 (020024-6 p.)ISBN: 978-0-7354-4045-6. ISSN: 1551-7616.
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[nazev_en] => Determination of Ramberg-Osgood approximation for estimation of low- temperature fracture toughness.
[popis_en] => his article presents a new method for determination of parameters of the Ramberg-Osgood (R-O) approxi-mation of the tensile diagram based on the loading-frame displacement. This procedure was successfully verified on thesamples of the high strength steel OCHN3MFA tested at various temperatures with records of both the extensometer elon-gation and the load-frame displacement. The method can be used in the model for prediction of theKIc-value based onthe critical strain local approach. The parameters of the R-O approximation obtained from the extensometer-controlledand the load-frame controlled tests are in a very good agreement. Moreover, the experimentalKIc-value at the cryogenictemperature of 77 K and the theoretical one predicted using the loading-frame displacement data are practically identical.
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[nazev] => Time-Domain Regenerative Chatter Analysis of Non-linear Stiffness System
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[duvernost_udaju_id] => S
[popis] => The phenomenon of self-excited vibration during machining still plays a key role in the productivity of a machine tool. The phenomenon was deeply analyzed by many works, but in the new prototype testing, unexpected behavior occurs. The hypothesis is that is caused by nonlinearity. This paper presents the approach of the time domain simulation of grooving cutting process for nonlinear analysis. The simulations compare linear stiffness model with two nonlinear, all these models were built by fitting measured static stiffness data by a regression model and also were built to have a similar response on modal hammer impulse, mainly the similar negative real part of the system response. The main idea for these simulations is to evaluate the effect of nonlinearity on system stability and primarily enables the description of vibration magnitude in the unstable region. The results showed that that nonlinear model has an influence on stability lobes and mainly on the magnitude of vibration in the unstable region which is significantly changed.
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[klicova_slova] => Chatter, Lobe diagram, Machine tool, Nonlinear stiffness, Time-domain simulation
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[url] =>
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[citace_text] => HADRABA, P.; HADAŠ, Z. Time-Domain Regenerative Chatter Analysis of Non-linear Stiffness System. In Advances in intelligent systems and computing. Advances in Intelligent Systems and Computing. Springer Verlag, 2019. p. 3-10. ISBN: 978-3-030-29992-7. ISSN: 2194-5357.
[citace_html] => HADRABA, P.; HADAŠ, Z. Time-Domain Regenerative Chatter Analysis of Non-linear Stiffness System. In Advances in intelligent systems and computing. Advances in Intelligent Systems and Computing. Springer Verlag, 2019. p. 3-10. ISBN: 978-3-030-29992-7. ISSN: 2194-5357.
[citace_rtf] =>
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author="Petr {Hadraba} and Zdeněk {Hadaš}",
title="Time-Domain Regenerative Chatter Analysis of Non-linear Stiffness System",
booktitle="Advances in intelligent systems and computing.",
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pages="3--10",
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[popis_en] => The phenomenon of self-excited vibration during machining still plays a key role in the productivity of a machine tool. The phenomenon was deeply analyzed by many works, but in the new prototype testing, unexpected behavior occurs. The hypothesis is that is caused by nonlinearity. This paper presents the approach of the time domain simulation of grooving cutting process for nonlinear analysis. The simulations compare linear stiffness model with two nonlinear, all these models were built by fitting measured static stiffness data by a regression model and also were built to have a similar response on modal hammer impulse, mainly the similar negative real part of the system response. The main idea for these simulations is to evaluate the effect of nonlinearity on system stability and primarily enables the description of vibration magnitude in the unstable region. The results showed that that nonlinear model has an influence on stability lobes and mainly on the magnitude of vibration in the unstable region which is significantly changed.
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[nazev] => Finite Element Simulations of Mechanical Behaviour of Endothelial Cells
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[duvernost_udaju_id] => S
[popis] => Biomechanical models based on the finite element method have already shown their potential in the simulation of the mechanical behaviour of cells. For instance, development of atherosclerosis is accelerated by damage of the endothelium, a monolayer of endothelial cells on the inner surface of arteries. Finite element models enable us to investigate mechanical factors not only at the level of the arterial wall but also at the level of individual cells. To achieve this, several finite element models of endothelial cells with different shapes are presented in this paper. Implementing the recently proposed bendotensegrity concept, these models consider the flexural behaviour of microtubules and incorporate also waviness of intermediate filaments. The suspended and adherent cell models are validated by comparison of their simulated force-deformation curves with experiments from the literature. The flat and dome cell models, mimicking natural cell shapes inside the endothelial layer, are then used to simulate their response in compression and shear which represent typical loads in a vascular wall. The models enable us to analyse the role of individual cytoskeletal components in the mechanical responses, as well as to quantify the nucleus deformation which is hypothesized to be the quantity decisive for mechanotransduction.
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[klicova_slova] => cytoskeleton, bendo-tensegrity, tension test, compression test, shear load
[klicova_slova_orig] => cytoskeleton, bendo-tensegrity, tension test, compression test, shear load
[url] => https://www.hindawi.com/journals/bmri/2021/8847372/
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[citace_text] => JAKKA, V.; BURŠA, J. Finite Element Simulations of Mechanical Behaviour of Endothelial Cells. Biomed Research International, 2021, vol. 2021, no. 1, p. 1-17. ISSN: 2314-6141.
[citace_html] => JAKKA, V.; BURŠA, J. Finite Element Simulations of Mechanical Behaviour of Endothelial Cells. Biomed Research International, 2021, vol. 2021, no. 1, p. 1-17. ISSN: 2314-6141.
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author="Veera Venkata Satya {Jakka} and Jiří {Burša}",
title="Finite Element Simulations of Mechanical Behaviour of Endothelial Cells",
journal="Biomed Research International",
year="2021",
volume="2021",
number="1",
pages="1--17",
doi="10.1155/2021/8847372",
issn="2314-6133",
url="https://www.hindawi.com/journals/bmri/2021/8847372/"
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[popis] => The contribution deals with modelling and prediction of fracture in ceramic materials combining finite element analysis and finite fracture mechanics using the coupled stress-energy criterion. It is hypothesized that cracking in brittle materials is originated when both the stress and the energy conditions are fulfilled simultaneously. Various fracture related problems applied to layered ceramics are analyzed and compared with experimental observations to assess the validity of the coupled criterion.
[popis_orig] => The contribution deals with modelling and prediction of fracture in ceramic materials combining finite element analysis and finite fracture mechanics using the coupled stress-energy criterion. It is hypothesized that cracking in brittle materials is originated when both the stress and the energy conditions are fulfilled simultaneously. Various fracture related problems applied to layered ceramics are analyzed and compared with experimental observations to assess the validity of the coupled criterion.
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[citace_rtf] =>
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title="Modelling of fracture in brittle solids using FEM and finite fracture mechanics",
year="2017",
volume="2",
number="2017",
pages="928--929",
address="Greece",
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