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[nazev] => Separation of gravitational acceleration from the acceleration of human motion using quaternion based Unscented Kalman filter
[nazev_orig] => Separation of gravitational acceleration from the acceleration of human motion using quaternion based Unscented Kalman filter
[duvernost_udaju_id] => S
[popis] => This paper describes a method for separation of the acceleration due to gravity from the motion acceleration obtained with the use of the inertial sensors. The proposed method based on the fusion of gyroscope and accelerometer measurements uses Unscented Kalman filter on the quaternion space for the estimation
of orientation.
[popis_orig] => This paper describes a method for separation of the acceleration due to gravity from the motion acceleration obtained with the use of the inertial sensors. The proposed method based on the fusion of gyroscope and accelerometer measurements uses Unscented Kalman filter on the quaternion space for the estimation
of orientation.
[klicova_slova] => Unscented Kalman filter; motion analysis; acceleration; attitude heading system; kinematics
[klicova_slova_orig] => Unscented Kalman filter; motion analysis; acceleration; attitude heading system; kinematics
[url] =>
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[identifikator] => ISBN 978-3-319-65959-6
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[citace_text] => KUMPÁN, P. Separation of gravitational acceleration from the acceleration of human motion using quaternion based Unscented Kalman filter. In Mechatronics 2017. 2017. p. 503-510. ISBN: 978-3-319-65959-6.
[citace_html] => KUMPÁN, P. Separation of gravitational acceleration from the acceleration of human motion using quaternion based Unscented Kalman filter. In Mechatronics 2017. 2017. p. 503-510. ISBN: 978-3-319-65959-6.
[citace_rtf] =>
[citace_bibtex] => @inproceedings{BUT139520,
author="Pavel {Kumpán}",
title="Separation of gravitational acceleration from the acceleration of human motion using quaternion based Unscented Kalman filter",
booktitle="Mechatronics 2017",
year="2017",
pages="503--510",
doi="10.1007/978-3-319-65960-2\{_}62",
isbn="978-3-319-65959-6"
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[nazev_en] => Separation of gravitational acceleration from the acceleration of human motion using quaternion based Unscented Kalman filter
[popis_en] => This paper describes a method for separation of the acceleration due to gravity from the motion acceleration obtained with the use of the inertial sensors. The proposed method based on the fusion of gyroscope and accelerometer measurements uses Unscented Kalman filter on the quaternion space for the estimation
of orientation.
[klicova_slova_en] => Unscented Kalman filter; motion analysis; acceleration; attitude heading system; kinematics
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[nazev] => Accelerated Tests for Lifetime Prediction of PE-HD Pipe Grades
[nazev_orig] => Accelerated Tests for Lifetime Prediction of PE-HD Pipe Grades
[duvernost_udaju_id] => S
[popis] => Pipe failure in long-term applications is characterized by creep crack initiation and creep crack growth. Both can be determined by fracture mechanics based tests of the pipe materials. Nowadays, several accelerated tests are available: PENT (Pennsylvania Edge Notch Tensile test), FNCT (Full Notch Creep Tensile test), CRB (Cracked Round Bar test) or SHT (Strain Hardening Test) and NCBT (Notched Cylindrical Bars Test). The PENT, CRB and SHT were applied to one unimodal polyethylene (PE 80), four bimodal polyethylene (three of PE 100 and one of PE 100-RC) and one PE-BF (for blow molding). The contribution is focused mainly on two topics: (i) difference in specimen's preparation and test conditions and (ii) comparison of the experimental results obtained using different accelerated tests.
[popis_orig] => Pipe failure in long-term applications is characterized by creep crack initiation and creep crack growth. Both can be determined by fracture mechanics based tests of the pipe materials. Nowadays, several accelerated tests are available: PENT (Pennsylvania Edge Notch Tensile test), FNCT (Full Notch Creep Tensile test), CRB (Cracked Round Bar test) or SHT (Strain Hardening Test) and NCBT (Notched Cylindrical Bars Test). The PENT, CRB and SHT were applied to one unimodal polyethylene (PE 80), four bimodal polyethylene (three of PE 100 and one of PE 100-RC) and one PE-BF (for blow molding). The contribution is focused mainly on two topics: (i) difference in specimen's preparation and test conditions and (ii) comparison of the experimental results obtained using different accelerated tests.
[klicova_slova] => accelerated tests; lifetime prediction; PE-HD; plastic pipes
[klicova_slova_orig] => accelerated tests; lifetime prediction; PE-HD; plastic pipes
[url] => http://onlinelibrary.wiley.com/wol1/doi/10.1002/masy.201600096/full
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[citace_text] => NEZBEDOVÁ, E.; PINTER, G.; FRANK, A.; HUTAŘ, P.; PODUŠKA, J.;HODAN, J. Accelerated Tests for Lifetime Prediction of PE-HD Pipe Grades. MACROMOLECULAR SYMPOSIA, 2017, vol. 373, no. 1, p. 188-195. ISSN: 1022-1360.
[citace_html] => NEZBEDOVÁ, E.; PINTER, G.; FRANK, A.; HUTAŘ, P.; PODUŠKA, J.;HODAN, J. Accelerated Tests for Lifetime Prediction of PE-HD Pipe Grades. MACROMOLECULAR SYMPOSIA, 2017, vol. 373, no. 1, p. 188-195. ISSN: 1022-1360.
[citace_rtf] =>
[citace_bibtex] => @article{BUT139531,
author="NEZBEDOVÁ, E. and PINTER, G. and FRANK, A. and HUTAŘ, P. and PODUŠKA, J. and HODAN, J.",
title="Accelerated Tests for Lifetime Prediction of PE-HD Pipe Grades",
journal="MACROMOLECULAR SYMPOSIA",
year="2017",
volume="373",
number="1",
pages="188--195",
doi="10.1002/masy.201600096",
issn="1022-1360",
url="http://onlinelibrary.wiley.com/wol1/doi/10.1002/masy.201600096/full"
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[nazev_en] => Accelerated Tests for Lifetime Prediction of PE-HD Pipe Grades
[popis_en] => Pipe failure in long-term applications is characterized by creep crack initiation and creep crack growth. Both can be determined by fracture mechanics based tests of the pipe materials. Nowadays, several accelerated tests are available: PENT (Pennsylvania Edge Notch Tensile test), FNCT (Full Notch Creep Tensile test), CRB (Cracked Round Bar test) or SHT (Strain Hardening Test) and NCBT (Notched Cylindrical Bars Test). The PENT, CRB and SHT were applied to one unimodal polyethylene (PE 80), four bimodal polyethylene (three of PE 100 and one of PE 100-RC) and one PE-BF (for blow molding). The contribution is focused mainly on two topics: (i) difference in specimen's preparation and test conditions and (ii) comparison of the experimental results obtained using different accelerated tests.
[klicova_slova_en] => accelerated tests; lifetime prediction; PE-HD; plastic pipes
[vysledek_datum] => 2017-06-22T00:00:00+02:00
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(
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[nazev] => Modification of Frame for Synchronous Machine with Permanent Magnet
[nazev_orig] => Modification of Frame for Synchronous Machine with Permanent Magnet
[duvernost_udaju_id] => S
[popis] => The modification of frame for permanent magnet synchronous machine is the aim of this contribution. The frame properties were identified on the base of measurement during motor testing. The eigenfrequency was obtained from the modal analysis of the frame. The results of modal analysis proved that the first eigenfrequency is in the region of the speed with vibration. It was therefore necessary to increase the frame eigenfrequency.
[popis_orig] => The modification of frame for permanent magnet synchronous machine is the aim of this contribution. The frame properties were identified on the base of measurement during motor testing. The eigenfrequency was obtained from the modal analysis of the frame. The results of modal analysis proved that the first eigenfrequency is in the region of the speed with vibration. It was therefore necessary to increase the frame eigenfrequency.
[klicova_slova] => Permanent magnet synchronous machine, Vibration, Modal analysis
[klicova_slova_orig] => Permanent magnet synchronous machine, Vibration, Modal analysis
[url] => https://link.springer.com/chapter/10.1007/978-3-319-65960-2_37
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[identifikator] => ISBN 978-3-319-65959-6
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[citace_text] => HUZLÍK, R.; LOŠÁK, P.; KURFŰRST, J.; ONDRŮŠEK, Č. Modification of Frame for Synchronous Machine with Permanent Magnet. In Mechatronics 2017 Recent Technological and Scientific Advances. Berlín: Springer Verlag, 2018. p. 296-301. ISBN: 978-3-319-65959-6.
[citace_html] => HUZLÍK, R.; LOŠÁK, P.; KURFŰRST, J.; ONDRŮŠEK, Č. Modification of Frame for Synchronous Machine with Permanent Magnet. In Mechatronics 2017 Recent Technological and Scientific Advances. Berlín: Springer Verlag, 2018. p. 296-301. ISBN: 978-3-319-65959-6.
[citace_rtf] =>
[citace_bibtex] => @inproceedings{BUT140422,
author="Rostislav {Huzlík} and Petr {Lošák} and Jiří {Kurfürst} and Čestmír {Ondrůšek}",
title="Modification of Frame for Synchronous Machine with Permanent Magnet",
booktitle="Mechatronics 2017 Recent Technological and Scientific Advances",
year="2018",
pages="296--301",
publisher="Springer Verlag",
address="Berlín",
doi="10.1007/978-3-319-65960-2\{_}37",
isbn="978-3-319-65959-6",
url="https://link.springer.com/chapter/10.1007/978-3-319-65960-2_37"
}
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[poznamka_metriky] =>
[nazev_en] => Modification of Frame for Synchronous Machine with Permanent Magnet
[popis_en] => The modification of frame for permanent magnet synchronous machine is the aim of this contribution. The frame properties were identified on the base of measurement during motor testing. The eigenfrequency was obtained from the modal analysis of the frame. The results of modal analysis proved that the first eigenfrequency is in the region of the speed with vibration. It was therefore necessary to increase the frame eigenfrequency.
[klicova_slova_en] => Permanent magnet synchronous machine, Vibration, Modal analysis
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[nazev] => Analysis of Boundary Conditions in Finite Element Sub-Models of Interaction of Human Mandible with Dental Implant
[nazev_orig] => Analysis of Boundary Conditions in Finite Element Sub-Models of Interaction of Human Mandible with Dental Implant
[duvernost_udaju_id] => S
[popis] => This paper deals with the computational modelling of dental implant interacting with bone tissue. For the purposes of the study, one human mandible and a segment of a different human mandible were examined. In total, five variants of geometry models with dental implant were investigated: One full mandible and four segments. For the latter, two different boundary conditions were used (first based on the sub-modeling approach and second assuming fixed support). If the coarse model for the particular bone segment model is not available, it is possible to use a generic boundary condition for a typical mandible subjected to a typical loading.
[popis_orig] => This paper deals with the computational modelling of dental implant interacting with bone tissue. For the purposes of the study, one human mandible and a segment of a different human mandible were examined. In total, five variants of geometry models with dental implant were investigated: One full mandible and four segments. For the latter, two different boundary conditions were used (first based on the sub-modeling approach and second assuming fixed support). If the coarse model for the particular bone segment model is not available, it is possible to use a generic boundary condition for a typical mandible subjected to a typical loading.
[klicova_slova] => Biomechanics; FEM; Dental Implant; Sub-modeling
[klicova_slova_orig] => Biomechanics; FEM; Dental Implant; Sub-modeling
[url] =>
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[citace_text] => MARCIÁN, P.; FLORIAN, Z.; HORÁČKOVÁ, L.; BORÁK, L. Analysis of Boundary Conditions in Finite Element Sub-Models of Interaction of Human Mandible with Dental Implant. In Engineering Mechanics 2017. 2017. p. 618-621. ISBN: 978-80-214-5497-2.
[citace_html] => MARCIÁN, P.; FLORIAN, Z.; HORÁČKOVÁ, L.; BORÁK, L. Analysis of Boundary Conditions in Finite Element Sub-Models of Interaction of Human Mandible with Dental Implant. In Engineering Mechanics 2017. 2017. p. 618-621. ISBN: 978-80-214-5497-2.
[citace_rtf] =>
[citace_bibtex] => @inproceedings{BUT140535,
author="Petr {Marcián} and Zdeněk {Florian} and Ladislava {Horáčková} and Libor {Borák}",
title="Analysis of Boundary Conditions in Finite Element Sub-Models of Interaction of Human Mandible with Dental Implant",
booktitle="Engineering Mechanics 2017",
year="2017",
pages="618--621",
isbn="978-80-214-5497-2"
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[nazev_en] => Analysis of Boundary Conditions in Finite Element Sub-Models of Interaction of Human Mandible with Dental Implant
[popis_en] => This paper deals with the computational modelling of dental implant interacting with bone tissue. For the purposes of the study, one human mandible and a segment of a different human mandible were examined. In total, five variants of geometry models with dental implant were investigated: One full mandible and four segments. For the latter, two different boundary conditions were used (first based on the sub-modeling approach and second assuming fixed support). If the coarse model for the particular bone segment model is not available, it is possible to use a generic boundary condition for a typical mandible subjected to a typical loading.
[klicova_slova_en] => Biomechanics; FEM; Dental Implant; Sub-modeling
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(
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[nazev] => Inhomogeneous Material Properties Assignment to Finite Element Models of Bone: A Sensitivity Study
[nazev_orig] => Inhomogeneous Material Properties Assignment to Finite Element Models of Bone: A Sensitivity Study
[duvernost_udaju_id] => S
[popis] => The present work deals with a strain intensity sensitivity to finite element mesh density in computational models of skull bone sample with an inhomogeneous distribution of Young's modulus. Computational experiments on models with various mesh density were conducted to test the hypothesis that the strain intensity distribution along the bone sample thickness is significantly influenced by the mesh density when material properties of bone obtained from the computer tomography are assigned to the finite element model. The results indicate that the mesh quality matters.
[popis_orig] => The present work deals with a strain intensity sensitivity to finite element mesh density in computational models of skull bone sample with an inhomogeneous distribution of Young's modulus. Computational experiments on models with various mesh density were conducted to test the hypothesis that the strain intensity distribution along the bone sample thickness is significantly influenced by the mesh density when material properties of bone obtained from the computer tomography are assigned to the finite element model. The results indicate that the mesh quality matters.
[klicova_slova] => Computer tomography; Finite element method; Material mapping; Patient-specific
[klicova_slova_orig] => Computer tomography; Finite element method; Material mapping; Patient-specific
[url] =>
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[citace_text] => BORÁK, L.; MARCIÁN, P. Inhomogeneous Material Properties Assignment to Finite Element Models of Bone: A Sensitivity Study. In Engineering Mechanics 2017. 2017. p. 190-193. ISBN: 978-80-214-5497-2.
[citace_html] => BORÁK, L.; MARCIÁN, P. Inhomogeneous Material Properties Assignment to Finite Element Models of Bone: A Sensitivity Study. In Engineering Mechanics 2017. 2017. p. 190-193. ISBN: 978-80-214-5497-2.
[citace_rtf] =>
[citace_bibtex] => @inproceedings{BUT140536,
author="Libor {Borák} and Petr {Marcián}",
title="Inhomogeneous Material Properties Assignment to Finite Element Models of Bone: A Sensitivity Study",
booktitle="Engineering Mechanics 2017",
year="2017",
pages="190--193",
isbn="978-80-214-5497-2"
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[nazev_en] => Inhomogeneous Material Properties Assignment to Finite Element Models of Bone: A Sensitivity Study
[popis_en] => The present work deals with a strain intensity sensitivity to finite element mesh density in computational models of skull bone sample with an inhomogeneous distribution of Young's modulus. Computational experiments on models with various mesh density were conducted to test the hypothesis that the strain intensity distribution along the bone sample thickness is significantly influenced by the mesh density when material properties of bone obtained from the computer tomography are assigned to the finite element model. The results indicate that the mesh quality matters.
[klicova_slova_en] => Computer tomography; Finite element method; Material mapping; Patient-specific
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)
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(
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[nazev] => INFLUENCE OF CERAMIC FOAM PARAMETERS ON THE FRACTURE BEHAVIOUR UPON THE TENSILE TEST
[nazev_orig] => INFLUENCE OF CERAMIC FOAM PARAMETERS ON THE FRACTURE BEHAVIOUR UPON THE TENSILE TEST
[duvernost_udaju_id] => S
[popis] => The contribution deals with numerical simulation of response of the open cell ceramic foam to tensile loading and attempts to predict experimental fracture-mechanics behaviour of the foams using numerical FE model composed of beam elements. Models of different structure irregularity (including regular one) are considered and generated using 3D Voronoi tessellation technique. Complete fracture of the model is simulated by iterative FE simulations where in each step, one strut with maximal tensile stress (higher than the material tensile strength) is removed until complete separation of the model in two parts. Critical forces, leading to complete breakage of the foam structure, together with final fracture "surfaces", are investigated and compared for both regular and irregular structures. It is shown that the regular foam structure, composed of Kelvin cells, exhibit generally 10 - 20 % higher fracture resistance than the irregular foam structures and also that structures with smaller cells should be more fracture resistant than the structures with bigger cells.
[popis_orig] => The contribution deals with numerical simulation of response of the open cell ceramic foam to tensile loading and attempts to predict experimental fracture-mechanics behaviour of the foams using numerical FE model composed of beam elements. Models of different structure irregularity (including regular one) are considered and generated using 3D Voronoi tessellation technique. Complete fracture of the model is simulated by iterative FE simulations where in each step, one strut with maximal tensile stress (higher than the material tensile strength) is removed until complete separation of the model in two parts. Critical forces, leading to complete breakage of the foam structure, together with final fracture "surfaces", are investigated and compared for both regular and irregular structures. It is shown that the regular foam structure, composed of Kelvin cells, exhibit generally 10 - 20 % higher fracture resistance than the irregular foam structures and also that structures with smaller cells should be more fracture resistant than the structures with bigger cells.
[klicova_slova] => Ceramic foam, Fracture, FEM, Voronoi tessellation, Tensile test
[klicova_slova_orig] => Ceramic foam, Fracture, FEM, Voronoi tessellation, Tensile test
[url] =>
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[vycet_osob] => ŠEVEČEK, O.; MAJER, Z.; KOTOUL, M.
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[identifikator] => ISBN 978-80-214-5497-2 ISSN 1805-8248
[identifikator_popis] => ISBN - Engineering Mechanics 2017 ISSN - Engineering Mechanics (CZ)
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[citace_text] => ŠEVEČEK, O.; MAJER, Z.; KOTOUL, M. INFLUENCE OF CERAMIC FOAM PARAMETERS ON THE FRACTURE BEHAVIOUR UPON THE TENSILE TEST. In Engineering Mechanics 2017. Engineering Mechanics. Praha: ACAD SCI CZECH REPUBLIC, INST THERMOMECHANICS, DOLEJSKOVA 5, PRAGUE 8, 182 00, CZECH REPUBLIC, 2017. no. 2017, p. 862-865. ISBN: 978-80-214-5497-2. ISSN: 1805-8248.
[citace_html] => ŠEVEČEK, O.; MAJER, Z.; KOTOUL, M. INFLUENCE OF CERAMIC FOAM PARAMETERS ON THE FRACTURE BEHAVIOUR UPON THE TENSILE TEST. In Engineering Mechanics 2017. Engineering Mechanics. Praha: ACAD SCI CZECH REPUBLIC, INST THERMOMECHANICS, DOLEJSKOVA 5, PRAGUE 8, 182 00, CZECH REPUBLIC, 2017. no. 2017, p. 862-865. ISBN: 978-80-214-5497-2. ISSN: 1805-8248.
[citace_rtf] =>
[citace_bibtex] => @inproceedings{BUT140776,
author="Oldřich {Ševeček} and Zdeněk {Majer} and Michal {Kotoul}",
title="INFLUENCE OF CERAMIC FOAM PARAMETERS ON THE FRACTURE BEHAVIOUR UPON THE TENSILE TEST",
booktitle="Engineering Mechanics 2017",
year="2017",
journal="Engineering Mechanics",
number="2017",
pages="862--865",
publisher="ACAD SCI CZECH REPUBLIC, INST THERMOMECHANICS, DOLEJSKOVA 5, PRAGUE 8, 182 00, CZECH REPUBLIC",
address="Praha",
isbn="978-80-214-5497-2",
issn="1805-8248"
}
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[oecd_tree_podobor_nazev] => Ceramics
[poznamka_metriky] =>
[nazev_en] => INFLUENCE OF CERAMIC FOAM PARAMETERS ON THE FRACTURE BEHAVIOUR UPON THE TENSILE TEST
[popis_en] => The contribution deals with numerical simulation of response of the open cell ceramic foam to tensile loading and attempts to predict experimental fracture-mechanics behaviour of the foams using numerical FE model composed of beam elements. Models of different structure irregularity (including regular one) are considered and generated using 3D Voronoi tessellation technique. Complete fracture of the model is simulated by iterative FE simulations where in each step, one strut with maximal tensile stress (higher than the material tensile strength) is removed until complete separation of the model in two parts. Critical forces, leading to complete breakage of the foam structure, together with final fracture "surfaces", are investigated and compared for both regular and irregular structures. It is shown that the regular foam structure, composed of Kelvin cells, exhibit generally 10 - 20 % higher fracture resistance than the irregular foam structures and also that structures with smaller cells should be more fracture resistant than the structures with bigger cells.
[klicova_slova_en] => Ceramic foam, Fracture, FEM, Voronoi tessellation, Tensile test
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)
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(
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[nazev] => Study of Influence of Residual Stresses on Crack Propagation in Particulate Ceramic Composites
[nazev_orig] => Study of Influence of Residual Stresses on Crack Propagation in Particulate Ceramic Composites
[duvernost_udaju_id] => S
[popis] => The aim of the present work is to analyze the influence of residual stresses in the particulate ceramic composite on the crack propagation. The crack propagation direction was estimated using Sih’s criterion based on the strain energy density factor. A two-dimensional finite element model was developed for determination of crack path. The residual stresses resulting from the mismatch of coefficients of thermal expansion during the fabrication process of the composite were implemented to the computational model. The effect of the particles shape on the crack propagation was investigated. Conclusions of this paper can contribute to a better understanding of the propagation of micro-cracks in particulate composites in the field of residual stresses.
[popis_orig] => The aim of the present work is to analyze the influence of residual stresses in the particulate ceramic composite on the crack propagation. The crack propagation direction was estimated using Sih’s criterion based on the strain energy density factor. A two-dimensional finite element model was developed for determination of crack path. The residual stresses resulting from the mismatch of coefficients of thermal expansion during the fabrication process of the composite were implemented to the computational model. The effect of the particles shape on the crack propagation was investigated. Conclusions of this paper can contribute to a better understanding of the propagation of micro-cracks in particulate composites in the field of residual stresses.
[klicova_slova] => residual stresses, particulate ceramic composite, crack propagation, shielding effect
[klicova_slova_orig] => residual stresses, particulate ceramic composite, crack propagation, shielding effect
[url] => https://www.scientific.net/SSP.258.178
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[identifikator] => ISBN 978-3-03835-626-4 ISSN 1012-0394
[identifikator_popis] => ISBN - MSMF8. International Conference on Materials Structure and Micromechanics of Fracture ISSN - Solid State Phenomena (CH)
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[citace_text] => MAJER, Z.; NÁHLÍK, L.; ŠTEGNEROVÁ, K.; HUTAŘ, P.; BERMEJO, R. Study of Influence of Residual Stresses on Crack Propagation in Particulate Ceramic Composites. In MSMF8. International Conference on Materials Structure and Micromechanics of Fracture. Solid State Phenomena. 8. Zürrich, Switzerland: Trans Tech Publications Inc., 2017. no. 258, p. 178-181. ISBN: 978-3-03835-626-4. ISSN: 1662-9779.
[citace_html] => MAJER, Z.; NÁHLÍK, L.; ŠTEGNEROVÁ, K.; HUTAŘ, P.; BERMEJO, R. Study of Influence of Residual Stresses on Crack Propagation in Particulate Ceramic Composites. In MSMF8. International Conference on Materials Structure and Micromechanics of Fracture. Solid State Phenomena. 8. Zürrich, Switzerland: Trans Tech Publications Inc., 2017. no. 258, p. 178-181. ISBN: 978-3-03835-626-4. ISSN: 1662-9779.
[citace_rtf] =>
[citace_bibtex] => @inproceedings{BUT141076,
author="Zdeněk {Majer} and Luboš {Náhlík} and Kateřina {Štegnerová} and Pavel {Hutař} and Raul {Bermejo}",
title="Study of Influence of Residual Stresses on Crack Propagation in Particulate Ceramic Composites",
booktitle="MSMF8. International Conference on Materials Structure and Micromechanics of Fracture",
year="2017",
series="8",
journal="Solid State Phenomena",
number="258",
pages="178--181",
publisher="Trans Tech Publications Inc.",
address="Zürrich, Switzerland",
doi="10.4028/www.scientific.net/SSP.258.178",
isbn="978-3-03835-626-4",
issn="1012-0394",
url="https://www.scientific.net/SSP.258.178"
}
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[poznamka_metriky] =>
[nazev_en] => Study of Influence of Residual Stresses on Crack Propagation in Particulate Ceramic Composites
[popis_en] => The aim of the present work is to analyze the influence of residual stresses in the particulate ceramic composite on the crack propagation. The crack propagation direction was estimated using Sih’s criterion based on the strain energy density factor. A two-dimensional finite element model was developed for determination of crack path. The residual stresses resulting from the mismatch of coefficients of thermal expansion during the fabrication process of the composite were implemented to the computational model. The effect of the particles shape on the crack propagation was investigated. Conclusions of this paper can contribute to a better understanding of the propagation of micro-cracks in particulate composites in the field of residual stresses.
[klicova_slova_en] => residual stresses, particulate ceramic composite, crack propagation, shielding effect
[vysledek_datum] => 2017-01-02T00:00:00+01:00
)
[7] => Array
(
[vysledek_id] => 141112
[vysledek_druh_id] => PAT
[ex_vysledek_id] => 21481
[vysledek_rok] => 2017
[nazev] => Senzorická síť s topologií binárního stromu
[nazev_orig] => Senzorická síť s topologií binárního stromu
[duvernost_udaju_id] => S
[popis] => Senzorická síť s topologií binárního stromu obsahuje kořen (A) sítě, určený k připojení sítě k řídicímu systému, k adresování koncového členu (C) a ke čtení dat těchto koncových členů (C), na nějž je přes alespoň jeden uzel (B) s přepínačem (6), určený k adresování koncového členu (C) pomocí signálu přivedeného prostřednictvím aktivního adresového vodiče na řídicí kontakt přepínače uzlu (B), a přes alespoň jedno propojovací vedení (D), obsahující adresové vodiče (2), napájecí vodič (3), datový vodič (4) a zemnicí vodič (5), připojen alespoň jeden koncový člen (C). Přepínač (6) uzlu (B) obsahuje řídicí kontakt, vstupní kontakt (a) a dva výstupní kontakty (b, c), kde na řídicí kontakt je přiveden aktivní adresový vodič (2a) nadvětve senzorické sítě, jehož signál přepínač (5) přepíná mezi podvětvemi, na vstupní kontakt (a) přepínače (6) je přiveden datový vodič (4) nadvětve senzorické sítě, a na výstupní kontakty (b, c) jsou připojeny datové vodiče podvětví senzorické sítě.
[popis_orig] => Senzorická síť s topologií binárního stromu obsahuje kořen (A) sítě, určený k připojení sítě k řídicímu systému, k adresování koncového členu (C) a ke čtení dat těchto koncových členů (C), na nějž je přes alespoň jeden uzel (B) s přepínačem (6), určený k adresování koncového členu (C) pomocí signálu přivedeného prostřednictvím aktivního adresového vodiče na řídicí kontakt přepínače uzlu (B), a přes alespoň jedno propojovací vedení (D), obsahující adresové vodiče (2), napájecí vodič (3), datový vodič (4) a zemnicí vodič (5), připojen alespoň jeden koncový člen (C). Přepínač (6) uzlu (B) obsahuje řídicí kontakt, vstupní kontakt (a) a dva výstupní kontakty (b, c), kde na řídicí kontakt je přiveden aktivní adresový vodič (2a) nadvětve senzorické sítě, jehož signál přepínač (5) přepíná mezi podvětvemi, na vstupní kontakt (a) přepínače (6) je přiveden datový vodič (4) nadvětve senzorické sítě, a na výstupní kontakty (b, c) jsou připojeny datové vodiče podvětví senzorické sítě.
[klicova_slova] => Senzorická síť, měrení dat, komunikační sběrnice
[klicova_slova_orig] => Senzorická síť, měrení dat, komunikační sběrnice
[url] => https://isdv.upv.cz/webapp/webapp.pts.det?xprim=10225999&lan=cs&s_majs=&s_puvo=&s_naze=&s_anot=
[oecd_obor_id] => 20204
[odpovedny_utvar_id] => 157
[odpovedny_utvar_nazev] => Institute of Solid Mechanics, Mechatronics and Biomechanics
[odpovedny_utvar_zkratka] => ISMMB
[nadrazena_soucast_id] => 4
[nadrazena_soucast_zkratka] => FME
[nadrazena_soucast_nazev] => Faculty of Mechanical Engineering
[originalni_jazyk] => cs
[schvalil_id] => 18462
[schvaleno] => 2017-11-08
[vykazovat_riv] => 1
[vykazovat_riv_zmeny] => 1
[slozka_id] => 83558
[posledni_diagnostika] =>
[vycet_osob] => VĚCHET, S.; KREJSA, J.
[pocet_tvurcu] => 2
[tvurci_ids] =>
[poznamka] =>
[typ_nazev] =>
[kod_doi] =>
[kod_dspace] =>
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[pocet_zaznamu] =>
[zverejneno] => 1
[prvni_autor] =>
[korespondencni_autor] =>
[posledni_autor] =>
[znamka] =>
[kategorie_nazev] => Applied results
[druh_nazev] => Patent
[druh_popis] => Patent
[stav] => Approved
[vysledek_kategorie_id] => AV
[vysledek_system_kategorie_id] => PA
[vysledek_stav_id] => 3
[vlozil] => Informační systém Automat
[upravil] => Informační systém Automat
[ins_uid] => 999999
[upd_uid] => 999999
[ins_ts] => 2025-09-22
[upd_ts] => 2025-09-22
[status] => 9
[identifikator] =>
[identifikator_popis] =>
[riv_dodavka_id] => 1864
[riv_dodavka_oznaceni] => RIV18-TA0-26510___
[riv_dodavka_rok] => 2018
[diagnostika_pocet] => 0
[diagnostika_pocet_chyba] => 0
[diagnostika_pocet_upozorneni] => 0
[diagnostika_pocet_informace] => 0
[citace_text] => VĚCHET, S.; KREJSA, J.; Vysoké učení technické v Brně, Brno: Senzorická síť s topologií binárního stromu. 306855, Patent. (2017)
[citace_html] => VĚCHET, S.; KREJSA, J.; Vysoké učení technické v Brně, Brno: Senzorická síť s topologií binárního stromu. 306855, Patent. (2017)
[citace_rtf] =>
[citace_bibtex] => @misc{BUT141112,
author="Stanislav {Věchet} and Jiří {Krejsa}",
title="Senzorická síť s topologií binárního stromu",
year="2017",
url="https://isdv.upv.cz/webapp/webapp.pts.det?xprim=10225999&lan=cs&s_majs=&s_puvo=&s_naze=&s_anot=",
note="Patent"
}
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[oecd_tree_obor_id] => 20200
[oecd_tree_obor_nazev] => 2.2 Electrical engineering, Electronic engineering, Information engineering
[oecd_tree_podobor_id] => 20204
[oecd_tree_podobor_nazev] => Robotics and automatic control
[poznamka_metriky] =>
[nazev_en] => A sensory network with the binary tree topology
[popis_en] => The sensory network with the binary tree topology comprises the network root (A) for connecting the network to a control system for addressing the end member (C) and for reading the data of these end members (C), to which, there is connect at least one end member (C) via at least one node (B) with the switch (6) for addressing the end member (C) by means of a signal applied via an active addressed conductor to the node (B) switch and via at least one interconnection line (D) comprising the address conductors (2), the power conductor (3), the data conductor (4) and the earthed conductor (5). The node (B) switch (6) comprises a control contact, the input contact (a) and two output contacts (b, c), where the active address conductor (2a) of the superior branch of the sensory network, whose signal switch (5) switches between the subbranches, is fed to the control contact, the data conductor (4) of the superior branch of the sensory network is fed to the input contact (a) of the switch (6).
[klicova_slova_en] => Senzory netvork, data acquisition, communication bus
[vysledek_datum] => 2017-06-28T00:00:00+02:00
)
[8] => Array
(
[vysledek_id] => 141135
[vysledek_druh_id] => ARTWOS
[ex_vysledek_id] => 125284
[vysledek_rok] => 2018
[nazev] => Elastic properties of multi-layered ceramic systems for SOCs
[nazev_orig] => Elastic properties of multi-layered ceramic systems for SOCs
[duvernost_udaju_id] => S
[popis] => SOCs (Solid Oxide Cells) operate in harsh conditions and have to withstand considerable static and cyclic stresses, both mechanical and thermal. Thus, their mechanical stability is threatened. One fundamental aspect is the structural integrity of the cell. In fact, mechanical failure of a single cell can damage the whole stack, reducing the lifetime and the efficiency of the entire system. This study focuses on the ceramic layered structure of an Yttria-stabilized electrolyte supported cell. Its elastic modulus has been measured through destructive and nondestructive techniques (three-point bending test, impulse excitation technique, tensile test). Many literature sources deal with properties of the most common electrolytes and electrodes, yet co-sintering effects and interactions between layers are still not fully comprehended. In this contribution the overall elastic performance of the cell has been investigated, focusing on the role that the interface between layers plays in the changing of resulting mechanical properties. To enable this investigation, layers were added to the electrolyte one by one, thus allowing individual interactions to be distinguished with the help of numerical simulations. Results obtained for consecutive samples through different techniques
have been compared and discussed.
[popis_orig] => SOCs (Solid Oxide Cells) operate in harsh conditions and have to withstand considerable static and cyclic stresses, both mechanical and thermal. Thus, their mechanical stability is threatened. One fundamental aspect is the structural integrity of the cell. In fact, mechanical failure of a single cell can damage the whole stack, reducing the lifetime and the efficiency of the entire system. This study focuses on the ceramic layered structure of an Yttria-stabilized electrolyte supported cell. Its elastic modulus has been measured through destructive and nondestructive techniques (three-point bending test, impulse excitation technique, tensile test). Many literature sources deal with properties of the most common electrolytes and electrodes, yet co-sintering effects and interactions between layers are still not fully comprehended. In this contribution the overall elastic performance of the cell has been investigated, focusing on the role that the interface between layers plays in the changing of resulting mechanical properties. To enable this investigation, layers were added to the electrolyte one by one, thus allowing individual interactions to be distinguished with the help of numerical simulations. Results obtained for consecutive samples through different techniques
have been compared and discussed.
[klicova_slova] => elastic constants, finite element analysis, fuel cells, layered ceramics
[klicova_slova_orig] => elastic constants, finite element analysis, fuel cells, layered ceramics
[url] => http://onlinelibrary.wiley.com/doi/10.1111/ijac.12801/full
[oecd_obor_id] => 20504
[odpovedny_utvar_id] => 157
[odpovedny_utvar_nazev] => Institute of Solid Mechanics, Mechatronics and Biomechanics
[odpovedny_utvar_zkratka] => ISMMB
[nadrazena_soucast_id] => 4
[nadrazena_soucast_zkratka] => FME
[nadrazena_soucast_nazev] => Faculty of Mechanical Engineering
[originalni_jazyk] => en
[schvalil_id] => 200135
[schvaleno] => 2020-04-10
[vykazovat_riv] => 1
[vykazovat_riv_zmeny] => 1
[slozka_id] =>
[posledni_diagnostika] =>
[vycet_osob] => MASINI, A.; ŠIŠKA, F.; ŠEVEČEK, O.; CHLUP, Z.; DLOUHÝ, I.
[pocet_tvurcu] => 5
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[poznamka] =>
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[kod_doi] => 10.1111/ijac.12801
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[zverejneno] => 1
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[korespondencni_autor] =>
[posledni_autor] =>
[znamka] =>
[kategorie_nazev] => Publication results
[druh_nazev] => WoS Article
[druh_popis] => Peer-reviewed article included in Web of Science database as as an “Article”, “Review” or “Letter”
[stav] => Approved
[vysledek_kategorie_id] => PV
[vysledek_system_kategorie_id] => PU
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[vlozil] => Informační systém Automat
[upravil] => Informační systém Automat
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[ins_ts] => 2025-09-22
[upd_ts] => 2025-09-22
[status] => 9
[identifikator] => ISSN 1546-542X
[identifikator_popis] => ISSN - International journal of applied ceramic technology (US)
[riv_dodavka_id] => 1864
[riv_dodavka_oznaceni] => RIV18-TA0-26510___
[riv_dodavka_rok] => 2018
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[citace_text] => MASINI, A.; ŠIŠKA, F.; ŠEVEČEK, O.; CHLUP, Z.; DLOUHÝ, I. Elastic properties of multi-layered ceramic systems for SOCs. International journal of applied ceramic technology, 2018, vol. 2017, no. 1, p. 370-379. ISSN: 1744-7402.
[citace_html] => MASINI, A.; ŠIŠKA, F.; ŠEVEČEK, O.; CHLUP, Z.; DLOUHÝ, I. Elastic properties of multi-layered ceramic systems for SOCs. International journal of applied ceramic technology, 2018, vol. 2017, no. 1, p. 370-379. ISSN: 1744-7402.
[citace_rtf] =>
[citace_bibtex] => @article{BUT141135,
author="Alessia {Masini} and Filip {Šiška} and Oldřich {Ševeček} and Zdeněk {Chlup} and Ivo {Dlouhý}",
title="Elastic properties of multi-layered ceramic systems for SOCs",
journal="International journal of applied ceramic technology",
year="2018",
volume="2017",
number="1",
pages="370--379",
doi="10.1111/ijac.12801",
issn="1546-542X",
url="http://onlinelibrary.wiley.com/doi/10.1111/ijac.12801/full"
}
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[oecd_tree_podobor_id] => 20504
[oecd_tree_podobor_nazev] => Ceramics
[poznamka_metriky] =>
[nazev_en] => Elastic properties of multi-layered ceramic systems for SOCs
[popis_en] => SOCs (Solid Oxide Cells) operate in harsh conditions and have to withstand considerable static and cyclic stresses, both mechanical and thermal. Thus, their mechanical stability is threatened. One fundamental aspect is the structural integrity of the cell. In fact, mechanical failure of a single cell can damage the whole stack, reducing the lifetime and the efficiency of the entire system. This study focuses on the ceramic layered structure of an Yttria-stabilized electrolyte supported cell. Its elastic modulus has been measured through destructive and nondestructive techniques (three-point bending test, impulse excitation technique, tensile test). Many literature sources deal with properties of the most common electrolytes and electrodes, yet co-sintering effects and interactions between layers are still not fully comprehended. In this contribution the overall elastic performance of the cell has been investigated, focusing on the role that the interface between layers plays in the changing of resulting mechanical properties. To enable this investigation, layers were added to the electrolyte one by one, thus allowing individual interactions to be distinguished with the help of numerical simulations. Results obtained for consecutive samples through different techniques
have been compared and discussed.
[klicova_slova_en] => elastic constants, finite element analysis, fuel cells, layered ceramics
[vysledek_datum] => 2018-03-31T00:00:00+02:00
)
[9] => Array
(
[vysledek_id] => 141223
[vysledek_druh_id] => ARTWOS
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[vysledek_rok] => 2017
[nazev] => Short fatigue crack behaviour under low cycle fatigue regime
[nazev_orig] => Short fatigue crack behaviour under low cycle fatigue regime
[duvernost_udaju_id] => S
[popis] => This paper addresses the important issue of the description of short fatigue crack behaviour. It is typical for these cracks that they propagate under large scale yielding conditions at the crack tip, which means that the non-linear fracture mechanics has to be applied. This paper presents results of experiments designed to measure the short crack growth rates in five different materials – 316L steel, Eurofer 97 steel, ODS Eurofer steel, Duplex 2205 steel and Al 6082 alloy. The crack growth rates of these materials are described using different fracture mechanics parameters – the stress intensity factor, the J-integral and the plastic part of the J-integral. These approaches are evaluated and compared. The comparison revealed that the plastic part of the J-integral is the parameter governing the short crack growth rate in large scale yielding conditions. Moreover, crack growth rate data from all the tested materials measured at various loading levels lies on a unique curve. This remarkable observation suggests that the crack growth rate is determined by the extent of energy spent to plastic deformation, irrespective of the other materials properties.
[popis_orig] => This paper addresses the important issue of the description of short fatigue crack behaviour. It is typical for these cracks that they propagate under large scale yielding conditions at the crack tip, which means that the non-linear fracture mechanics has to be applied. This paper presents results of experiments designed to measure the short crack growth rates in five different materials – 316L steel, Eurofer 97 steel, ODS Eurofer steel, Duplex 2205 steel and Al 6082 alloy. The crack growth rates of these materials are described using different fracture mechanics parameters – the stress intensity factor, the J-integral and the plastic part of the J-integral. These approaches are evaluated and compared. The comparison revealed that the plastic part of the J-integral is the parameter governing the short crack growth rate in large scale yielding conditions. Moreover, crack growth rate data from all the tested materials measured at various loading levels lies on a unique curve. This remarkable observation suggests that the crack growth rate is determined by the extent of energy spent to plastic deformation, irrespective of the other materials properties.
[klicova_slova] => J-integral; Large scale yielding; Low cycle fatigue; Short fatigue crack;
[klicova_slova_orig] => J-integral; Large scale yielding; Low cycle fatigue; Short fatigue crack;
[url] => http://www.sciencedirect.com/science/article/pii/S0142112317302529?via%3Dihub
[oecd_obor_id] => 20306
[odpovedny_utvar_id] => 157
[odpovedny_utvar_nazev] => Institute of Solid Mechanics, Mechatronics and Biomechanics
[odpovedny_utvar_zkratka] => ISMMB
[nadrazena_soucast_id] => 4
[nadrazena_soucast_zkratka] => FME
[nadrazena_soucast_nazev] => Faculty of Mechanical Engineering
[originalni_jazyk] => en
[schvalil_id] => 106120
[schvaleno] => 2017-11-10
[vykazovat_riv] => 1
[vykazovat_riv_zmeny] => 1
[slozka_id] =>
[posledni_diagnostika] =>
[vycet_osob] => HUTAŘ, P.; PODUŠKA, J.; ŠMÍD, M.; KUBĚNA, I.; CHLUPOVÁ, A.; NÁHLÍK, L.; POLÁK, J.; KRUML, T.
[pocet_tvurcu] => 8
[tvurci_ids] =>
[poznamka] =>
[typ_nazev] =>
[kod_doi] => 10.1016/j.ijfatigue.2017.06.002
[kod_dspace] =>
[rok_vytvoreni] =>
[pocet_zaznamu] =>
[zverejneno] => 1
[prvni_autor] =>
[korespondencni_autor] =>
[posledni_autor] =>
[znamka] =>
[kategorie_nazev] => Publication results
[druh_nazev] => WoS Article
[druh_popis] => Peer-reviewed article included in Web of Science database as as an “Article”, “Review” or “Letter”
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[citace_text] => HUTAŘ, P.; PODUŠKA, J.; ŠMÍD, M.; KUBĚNA, I.; CHLUPOVÁ, A.; NÁHLÍK, L.; POLÁK, J.; KRUML, T. Short fatigue crack behaviour under low cycle fatigue regime. International Journal of Fatigue, 2017, vol. 103, no. October 2017, p. 207-215. ISSN: 0142-1123.
[citace_html] => HUTAŘ, P.; PODUŠKA, J.; ŠMÍD, M.; KUBĚNA, I.; CHLUPOVÁ, A.; NÁHLÍK, L.; POLÁK, J.; KRUML, T. Short fatigue crack behaviour under low cycle fatigue regime. International Journal of Fatigue, 2017, vol. 103, no. October 2017, p. 207-215. ISSN: 0142-1123.
[citace_rtf] =>
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author="Pavel {Hutař} and Jan {Poduška} and Miroslav {Šmíd} and Ivo {Kuběna} and Alice {Chlupová} and Luboš {Náhlík} and Jaroslav {Polák} and Tomáš {Kruml}",
title="Short fatigue crack behaviour under low cycle fatigue regime",
journal="International Journal of Fatigue",
year="2017",
volume="103",
number="October 2017",
pages="207--215",
doi="10.1016/j.ijfatigue.2017.06.002",
issn="0142-1123",
url="http://www.sciencedirect.com/science/article/pii/S0142112317302529?via%3Dihub"
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[nazev_en] => Short fatigue crack behaviour under low cycle fatigue regime
[popis_en] => This paper addresses the important issue of the description of short fatigue crack behaviour. It is typical for these cracks that they propagate under large scale yielding conditions at the crack tip, which means that the non-linear fracture mechanics has to be applied. This paper presents results of experiments designed to measure the short crack growth rates in five different materials – 316L steel, Eurofer 97 steel, ODS Eurofer steel, Duplex 2205 steel and Al 6082 alloy. The crack growth rates of these materials are described using different fracture mechanics parameters – the stress intensity factor, the J-integral and the plastic part of the J-integral. These approaches are evaluated and compared. The comparison revealed that the plastic part of the J-integral is the parameter governing the short crack growth rate in large scale yielding conditions. Moreover, crack growth rate data from all the tested materials measured at various loading levels lies on a unique curve. This remarkable observation suggests that the crack growth rate is determined by the extent of energy spent to plastic deformation, irrespective of the other materials properties.
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[popis] => The effect of subcritical crack growth is nowadays intensively studied mainly in relation to the strength of ceramic materials. The main aim of the contribution is to describe behavior of micro-crack propagating in the Low Temperature Co-fired Ceramics (LTCC) under subcritical crack growth (SCCG) conditions. The micro-crack behavior is significantly influenced by residual stresses developed in the LTCC due to different coefficients of thermal expansion of individual components. Two-dimensional numerical model was developed to simulate micro-crack propagation through the composite. The micro-crack propagation direction was determined using Sih’s criterion based on the strain energy density factor and the micro-crack path was obtained. The residual lifetime of the specific ceramic particulate composite (LTCC) was estimated on the basis of experimental data. The paper contributes to a better understanding of micro-crack propagation in particulate ceramic composites in the field of residual stresses.
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[klicova_slova] => Ceramic Particulate Composite, LTCC, Residual Stresses, Subcritical Crack Propagation
[klicova_slova_orig] => Ceramic Particulate Composite, LTCC, Residual Stresses, Subcritical Crack Propagation
[url] => https://www.scientific.net/KEM.713.266
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[citace_rtf] =>
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author="Zdeněk {Majer} and Kateřina {Štegnerová} and Pavel {Hutař} and Martin {Pletz} and Raul {Bermejo} and Luboš {Náhlík}",
title="Residual Lifetime Determination of Low Temperature Co-Fired Ceramics",
booktitle="Advances in Fracture and Damage Mechanics XV",
year="2017",
journal="Key Engineering Materials (web)",
volume="713",
number="1",
pages="266--269",
publisher="Trans Tech Publications Inc.",
address="Zürrich, Switzerland",
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[popis_en] => The effect of subcritical crack growth is nowadays intensively studied mainly in relation to the strength of ceramic materials. The main aim of the contribution is to describe behavior of micro-crack propagating in the Low Temperature Co-fired Ceramics (LTCC) under subcritical crack growth (SCCG) conditions. The micro-crack behavior is significantly influenced by residual stresses developed in the LTCC due to different coefficients of thermal expansion of individual components. Two-dimensional numerical model was developed to simulate micro-crack propagation through the composite. The micro-crack propagation direction was determined using Sih’s criterion based on the strain energy density factor and the micro-crack path was obtained. The residual lifetime of the specific ceramic particulate composite (LTCC) was estimated on the basis of experimental data. The paper contributes to a better understanding of micro-crack propagation in particulate ceramic composites in the field of residual stresses.
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[popis] => A micro-crack propagation in particulate ceramic based composite was studied using finite element method (FEM). Subcritical crack growth (SCG) was numerically simulated under complex load conditions (mechanical loading and loading by internal residual stresses). The effect of residual stresses on the crack propagation was studied. Two-dimensional computational model of particulate ceramic composite with material properties corresponding to low temperature co-fired ceramics (LTCC) was developed. The results indicate that the presence of residual stresses significantly reduces values of stress intensity factor in the vicinity of composite surface and the direction of residual stresses around the particles contributes to the micro-crack deflection from the particles. The time to failure of the composite under mechanical loading was determined. Results obtained contribute to a better understanding of the role of residual stresses during micro-crack propagation in ceramic particulate composites.
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[klicova_slova] => Ceramic Particulate Composite, Residual Stress, Sub-Critical Crack Growth
[klicova_slova_orig] => Ceramic Particulate Composite, Residual Stress, Sub-Critical Crack Growth
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[citace_text] => NÁHLÍK, L.; MAJER, Z.; ŠTEGNEROVÁ, K.; HUTAŘ, P. Lifetime Assessment of Particulate Ceramic Composite with Residual Stresses. In Advances in Fracture and Damage Mechanics XVI. Key Engineering Materials (web). Zürrich, Switzerland: Trans Tech Publications Inc., 2018. no. 1, p. 107-110. ISBN: 978-3-0357-1168-4. ISSN: 1662-9795.
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[citace_rtf] =>
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title="Lifetime Assessment of Particulate Ceramic Composite with Residual Stresses",
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journal="Key Engineering Materials (web)",
volume="754",
number="1",
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publisher="Trans Tech Publications Inc.",
address="Zürrich, Switzerland",
doi="10.4028/www.scientific.net/KEM.754.107",
isbn="978-3-0357-1168-4",
issn="1662-9795",
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[popis_en] => A micro-crack propagation in particulate ceramic based composite was studied using finite element method (FEM). Subcritical crack growth (SCG) was numerically simulated under complex load conditions (mechanical loading and loading by internal residual stresses). The effect of residual stresses on the crack propagation was studied. Two-dimensional computational model of particulate ceramic composite with material properties corresponding to low temperature co-fired ceramics (LTCC) was developed. The results indicate that the presence of residual stresses significantly reduces values of stress intensity factor in the vicinity of composite surface and the direction of residual stresses around the particles contributes to the micro-crack deflection from the particles. The time to failure of the composite under mechanical loading was determined. Results obtained contribute to a better understanding of the role of residual stresses during micro-crack propagation in ceramic particulate composites.
[klicova_slova_en] => Ceramic Particulate Composite, Residual Stress, Sub-Critical Crack Growth
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[nazev_orig] => 3D Model of Crack Propagation in Particulate Ceramic Composite Containing Residual Stresses
[duvernost_udaju_id] => S
[popis] => A crack propagation and fracture behaviour of particulate ceramic composite were investigated. Influence of 3D shape of particles on the crack propagation was studied together with influence of the presence of residual stresses, which are developed inside the composite during manufacturing process. Finite element (FE) method was used for numerical simulation of propagating crack in the composite. Basic numerical models of low-temperature co-fired ceramics (LTCC) with alumina particles homogenously dispersed in the glass matrix were developed. Volume fraction of alumina phase was 20vol.%, which is typical amount for LTCC. The results show that existence of residual stresses retards the crack propagating under conditions of sub-critical crack growth (SCG). Presented results contribute to a better understanding of the role of residual stresses in particulate ceramic composites.
[popis_orig] => A crack propagation and fracture behaviour of particulate ceramic composite were investigated. Influence of 3D shape of particles on the crack propagation was studied together with influence of the presence of residual stresses, which are developed inside the composite during manufacturing process. Finite element (FE) method was used for numerical simulation of propagating crack in the composite. Basic numerical models of low-temperature co-fired ceramics (LTCC) with alumina particles homogenously dispersed in the glass matrix were developed. Volume fraction of alumina phase was 20vol.%, which is typical amount for LTCC. The results show that existence of residual stresses retards the crack propagating under conditions of sub-critical crack growth (SCG). Presented results contribute to a better understanding of the role of residual stresses in particulate ceramic composites.
[klicova_slova] => Ceramic Particulate Composite, Residual Stress, Sub-Critical Crack Growth
[klicova_slova_orig] => Ceramic Particulate Composite, Residual Stress, Sub-Critical Crack Growth
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[citace_text] => ŠTEGNEROVÁ, K.; MAJER, Z.; HUTAŘ, P.; NÁHLÍK, L. 3D Model of Crack Propagation in Particulate Ceramic Composite Containing Residual Stresses. In Advances in Fracture and Damage Mechanics XVI. Key Engineering Materials (print). Zürrich, Switzerland: Trans Tech Publications Inc., 2018. no. 1, p. 103-106. ISBN: 9783035713503. ISSN: 1013-9826.
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author="Kateřina {Štegnerová} and Zdeněk {Majer} and Pavel {Hutař} and Luboš {Náhlík}",
title="3D Model of Crack Propagation in Particulate Ceramic Composite Containing Residual Stresses",
booktitle="Advances in Fracture and Damage Mechanics XVI",
year="2018",
journal="Key Engineering Materials (print)",
volume="754",
number="1",
pages="103--106",
publisher="Trans Tech Publications Inc.",
address="Zürrich, Switzerland",
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isbn="9783035713503",
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[popis_en] => A crack propagation and fracture behaviour of particulate ceramic composite were investigated. Influence of 3D shape of particles on the crack propagation was studied together with influence of the presence of residual stresses, which are developed inside the composite during manufacturing process. Finite element (FE) method was used for numerical simulation of propagating crack in the composite. Basic numerical models of low-temperature co-fired ceramics (LTCC) with alumina particles homogenously dispersed in the glass matrix were developed. Volume fraction of alumina phase was 20vol.%, which is typical amount for LTCC. The results show that existence of residual stresses retards the crack propagating under conditions of sub-critical crack growth (SCG). Presented results contribute to a better understanding of the role of residual stresses in particulate ceramic composites.
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