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[nazev] => Consideration of stiffness of wall layers is decisive for patient-specific analysis of carotid artery with atheroma
[nazev_orig] => Consideration of stiffness of wall layers is decisive for patient-specific analysis of carotid artery with atheroma
[duvernost_udaju_id] => S
[popis] => The paper deals with the impact of chosen geometric and material factors on maximal stresses in carotid atherosclerotic plaque calculated using patient-specific finite element models. These stresses are believed to be decisive for the plaque vulnerability but all applied models suffer from inaccuracy of input data, especially when obtainedin vivoonly. One hundred computational models based onex vivoMRI are used to investigate the impact of wall thickness, MRI slice thickness, lipid core and fibrous tissue stiffness, and media anisotropy on the calculated peak plaque and peak cap stresses. The investigated factors are taken as continuous in the range based on published experimental results, only the impact of anisotropy is evaluated by comparison with a corresponding isotropic model. Design of Experiment concept is applied to assess the statistical significance of these investigated factors representing uncertainties in the input data of the model. The results show that consideration of realistic properties of arterial wall in the model is decisive for the stress evaluation; assignment of properties of fibrous tissue even to media and adventitia layers as done in some studies may induce up to eightfold overestimation of peak stress. The impact of MRI slice thickness may play a key role when local thin fibrous cap is present. Anisotropy of media layer is insignificant, and the stiffness of fibrous tissue and lipid core may become significant in some combinations.
[popis_orig] => The paper deals with the impact of chosen geometric and material factors on maximal stresses in carotid atherosclerotic plaque calculated using patient-specific finite element models. These stresses are believed to be decisive for the plaque vulnerability but all applied models suffer from inaccuracy of input data, especially when obtainedin vivoonly. One hundred computational models based onex vivoMRI are used to investigate the impact of wall thickness, MRI slice thickness, lipid core and fibrous tissue stiffness, and media anisotropy on the calculated peak plaque and peak cap stresses. The investigated factors are taken as continuous in the range based on published experimental results, only the impact of anisotropy is evaluated by comparison with a corresponding isotropic model. Design of Experiment concept is applied to assess the statistical significance of these investigated factors representing uncertainties in the input data of the model. The results show that consideration of realistic properties of arterial wall in the model is decisive for the stress evaluation; assignment of properties of fibrous tissue even to media and adventitia layers as done in some studies may induce up to eightfold overestimation of peak stress. The impact of MRI slice thickness may play a key role when local thin fibrous cap is present. Anisotropy of media layer is insignificant, and the stiffness of fibrous tissue and lipid core may become significant in some combinations.
[klicova_slova] => BIAXIAL MECHANICAL-PROPERTIES; FIBROUS CAP THICKNESS; IN-VIVO; ATHEROSCLEROTIC PLAQUES; STRESS; MODEL; MICROCALCIFICATIONS; RESOLUTION; STRAIN; INTACT
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[url] => https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0239447
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[identifikator] => ISSN 1932-6203
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[citace_text] => LISICKÝ, O.; MALÁ, A.; BEDNAŘÍK, Z.; NOVOTNÝ, T.; BURŠA, J. Consideration of stiffness of wall layers is decisive for patient-specific analysis of carotid artery with atheroma. PLoS One, 2020, vol. 15, no. 9, p. 1-18. ISSN: 1932-6203.
[citace_html] => LISICKÝ, O.; MALÁ, A.; BEDNAŘÍK, Z.; NOVOTNÝ, T.; BURŠA, J. Consideration of stiffness of wall layers is decisive for patient-specific analysis of carotid artery with atheroma. PLoS One, 2020, vol. 15, no. 9, p. 1-18. ISSN: 1932-6203.
[citace_rtf] =>
[citace_bibtex] => @article{BUT165769,
author="Ondřej {Lisický} and Aneta {Malá} and Zdeněk {Bednařík} and Tomáš {Novotný} and Jiří {Burša}",
title="Consideration of stiffness of wall layers is decisive for patient-specific analysis of carotid artery with atheroma",
journal="PLoS One",
year="2020",
volume="15",
number="9",
pages="1--18",
doi="10.1371/journal.pone.0239447",
issn="1932-6203",
url="https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0239447"
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[nazev_en] => Consideration of stiffness of wall layers is decisive for patient-specific analysis of carotid artery with atheroma
[popis_en] => The paper deals with the impact of chosen geometric and material factors on maximal stresses in carotid atherosclerotic plaque calculated using patient-specific finite element models. These stresses are believed to be decisive for the plaque vulnerability but all applied models suffer from inaccuracy of input data, especially when obtainedin vivoonly. One hundred computational models based onex vivoMRI are used to investigate the impact of wall thickness, MRI slice thickness, lipid core and fibrous tissue stiffness, and media anisotropy on the calculated peak plaque and peak cap stresses. The investigated factors are taken as continuous in the range based on published experimental results, only the impact of anisotropy is evaluated by comparison with a corresponding isotropic model. Design of Experiment concept is applied to assess the statistical significance of these investigated factors representing uncertainties in the input data of the model. The results show that consideration of realistic properties of arterial wall in the model is decisive for the stress evaluation; assignment of properties of fibrous tissue even to media and adventitia layers as done in some studies may induce up to eightfold overestimation of peak stress. The impact of MRI slice thickness may play a key role when local thin fibrous cap is present. Anisotropy of media layer is insignificant, and the stiffness of fibrous tissue and lipid core may become significant in some combinations.
[klicova_slova_en] => BIAXIAL MECHANICAL-PROPERTIES; FIBROUS CAP THICKNESS; IN-VIVO; ATHEROSCLEROTIC PLAQUES; STRESS; MODEL; MICROCALCIFICATIONS; RESOLUTION; STRAIN; INTACT
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[nazev] => FEM simulation of the nanoindentation test with rigid and non-rigid indenter
[nazev_orig] => FEM simulation of the nanoindentation test with rigid and non-rigid indenter
[duvernost_udaju_id] => S
[popis] => This paper focuses on the comparing of the results of the FEM simulations of fused silica nanoindentation tests. Fused silica is modelled like bilinear elasto-plastic material with the parameters estimated from the experiment. FEM simulations are made with the 2D axisymmetric conical indenter which is equivalent to the Berkovich indenter and the indentation curves are evaluated. The FEM simulations were made with the rigid and the non-rigid indenter and the difference between the indentation curves obtained with these models is assessed. The evaluated indentation curves are compared with the indentation curves obtained from the experiment.
[popis_orig] => This paper focuses on the comparing of the results of the FEM simulations of fused silica nanoindentation tests. Fused silica is modelled like bilinear elasto-plastic material with the parameters estimated from the experiment. FEM simulations are made with the 2D axisymmetric conical indenter which is equivalent to the Berkovich indenter and the indentation curves are evaluated. The FEM simulations were made with the rigid and the non-rigid indenter and the difference between the indentation curves obtained with these models is assessed. The evaluated indentation curves are compared with the indentation curves obtained from the experiment.
[klicova_slova] => Nanoindentation, Conical indenter, Silica, FEM
[klicova_slova_orig] => Nanoindentation, Conical indenter, Silica, FEM
[url] =>
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[identifikator] => ISBN 978-80-87012-71-0 ISSN 1805-8248
[identifikator_popis] => ISBN - Engineering mechanics 2019 ISSN - Engineering Mechanics (CZ)
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[citace_text] => KOVÁŘ, J.; FUIS, V. FEM simulation of the nanoindentation test with rigid and non-rigid indenter. In Engineering mechanics 2019. Engineering Mechanics. Praha: Institute of Thermomechanics of the Czech Academy of Sciences, 2019. no. 1, p. 189-192. ISBN: 978-80-87012-71-0. ISSN: 1805-8248.
[citace_html] => KOVÁŘ, J.; FUIS, V. FEM simulation of the nanoindentation test with rigid and non-rigid indenter. In Engineering mechanics 2019. Engineering Mechanics. Praha: Institute of Thermomechanics of the Czech Academy of Sciences, 2019. no. 1, p. 189-192. ISBN: 978-80-87012-71-0. ISSN: 1805-8248.
[citace_rtf] =>
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author="Jaroslav {Kovář} and Vladimír {Fuis}",
title="FEM simulation of the nanoindentation test with rigid and non-rigid indenter",
booktitle="Engineering mechanics 2019",
year="2019",
journal="Engineering Mechanics",
volume="1",
number="1",
pages="189--192",
publisher="Institute of Thermomechanics of the Czech Academy of Sciences",
address="Praha",
isbn="978-80-87012-71-0",
issn="1805-8248"
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[nazev_en] => FEM simulation of the nanoindentation test with rigid and non-rigid indenter
[popis_en] => This paper focuses on the comparing of the results of the FEM simulations of fused silica nanoindentation tests. Fused silica is modelled like bilinear elasto-plastic material with the parameters estimated from the experiment. FEM simulations are made with the 2D axisymmetric conical indenter which is equivalent to the Berkovich indenter and the indentation curves are evaluated. The FEM simulations were made with the rigid and the non-rigid indenter and the difference between the indentation curves obtained with these models is assessed. The evaluated indentation curves are compared with the indentation curves obtained from the experiment.
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[nazev] => Comparing the Results of Probability of Ceramic Head Fracture According to Weibull's Theory with Inclusion of One or Three Principal Stresses
[nazev_orig] => Comparing the Results of Probability of Ceramic Head Fracture According to Weibull's Theory with Inclusion of One or Three Principal Stresses
[duvernost_udaju_id] => S
[popis] => This paper focuses on the assessment of probability of ceramic head hip joint endoprothesis fracture.
The Weibull's weakest link theory with inclusion of one or all three principal stresses was used for calculations of probability of failure and the results were compared. The test of head of the hip joint endoprothesis according to ISO 7206 was modelled. Three variants were considered. In the first variant, the head of hip joint endoprothesis ended up without any imperfections from ideal geometry. In other two variants, the ceramic head had shape imperfection from nominal conicity. Principal stresses needed for the calculation of probability of failure were calculated by finite element method. The results with the use of linear and quadratic solid elements were compared and better option was chosen for the next calculations. The influence of allowed penetration, density of the mesh on the results of stresses and probability of failure was assessed. The Gaussian quadrature of 13th order was used for integration over the surface of unit hemisphere in space of principal stresses which was needed for computation of probability of failure with inclusion of all principal stresses. The influence of imperfection from nominal conicity on probability of failure of the head hip joint endoprothesis was calculated and the relative difference between the results of Weibull's weakest link theory with the inclusion of one or all three principal stressed was analyzed.
[popis_orig] => This paper focuses on the assessment of probability of ceramic head hip joint endoprothesis fracture.
The Weibull's weakest link theory with inclusion of one or all three principal stresses was used for calculations of probability of failure and the results were compared. The test of head of the hip joint endoprothesis according to ISO 7206 was modelled. Three variants were considered. In the first variant, the head of hip joint endoprothesis ended up without any imperfections from ideal geometry. In other two variants, the ceramic head had shape imperfection from nominal conicity. Principal stresses needed for the calculation of probability of failure were calculated by finite element method. The results with the use of linear and quadratic solid elements were compared and better option was chosen for the next calculations. The influence of allowed penetration, density of the mesh on the results of stresses and probability of failure was assessed. The Gaussian quadrature of 13th order was used for integration over the surface of unit hemisphere in space of principal stresses which was needed for computation of probability of failure with inclusion of all principal stresses. The influence of imperfection from nominal conicity on probability of failure of the head hip joint endoprothesis was calculated and the relative difference between the results of Weibull's weakest link theory with the inclusion of one or all three principal stressed was analyzed.
[klicova_slova] => ceramic; Weibull's weakest link theory; probability of failure; Gaussian quadrature; head of hip joint
endoprothesis; sensors; measurement
[klicova_slova_orig] => ceramic; Weibull's weakest link theory; probability of failure; Gaussian quadrature; head of hip joint
endoprothesis; sensors; measurement
[url] =>
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[identifikator] => ISBN 9788021455429
[identifikator_popis] => ISBN - 18th Mechatronika 2018 : proceedings of the 2018 18th International Conference on Mechatronics - Mechatronika (ME) 2018 : Brno, Czech Republic, December 5-7, 2018
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[citace_text] => KOVÁŘ, J.; FUIS, V. Comparing the Results of Probability of Ceramic Head Fracture According to Weibull's Theory with Inclusion of One or Three Principal Stresses. In 18th Mechatronika 2018 : proceedings of the 2018 18th International Conference on Mechatronics - Mechatronika (ME) 2018 : Brno, Czech Republic, December 5-7, 2018. Brno: 2018. p. 453-460. ISBN: 9788021455429.
[citace_html] => KOVÁŘ, J.; FUIS, V. Comparing the Results of Probability of Ceramic Head Fracture According to Weibull's Theory with Inclusion of One or Three Principal Stresses. In 18th Mechatronika 2018 : proceedings of the 2018 18th International Conference on Mechatronics - Mechatronika (ME) 2018 : Brno, Czech Republic, December 5-7, 2018. Brno: 2018. p. 453-460. ISBN: 9788021455429.
[citace_rtf] =>
[citace_bibtex] => @inproceedings{BUT166316,
author="Jaroslav {Kovář} and Vladimír {Fuis}",
title="Comparing the Results of Probability of Ceramic Head Fracture According to Weibull's Theory with Inclusion of One or Three Principal Stresses",
booktitle="18th Mechatronika 2018 : proceedings of the 2018 18th International Conference on Mechatronics - Mechatronika (ME) 2018 : Brno, Czech Republic, December 5-7, 2018",
year="2018",
pages="453--460",
address="Brno",
isbn="9788021455429"
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[oecd_tree_oblast_nazev] => 2. Engineering and Technology
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[oecd_tree_obor_nazev] => 2.3 Mechanical engineering
[oecd_tree_podobor_id] => 20302
[oecd_tree_podobor_nazev] => Applied mechanics
[poznamka_metriky] =>
[nazev_en] => Comparing the Results of Probability of Ceramic Head Fracture According to Weibull's Theory with Inclusion of One or Three Principal Stresses
[popis_en] => This paper focuses on the assessment of probability of ceramic head hip joint endoprothesis fracture.
The Weibull's weakest link theory with inclusion of one or all three principal stresses was used for calculations of probability of failure and the results were compared. The test of head of the hip joint endoprothesis according to ISO 7206 was modelled. Three variants were considered. In the first variant, the head of hip joint endoprothesis ended up without any imperfections from ideal geometry. In other two variants, the ceramic head had shape imperfection from nominal conicity. Principal stresses needed for the calculation of probability of failure were calculated by finite element method. The results with the use of linear and quadratic solid elements were compared and better option was chosen for the next calculations. The influence of allowed penetration, density of the mesh on the results of stresses and probability of failure was assessed. The Gaussian quadrature of 13th order was used for integration over the surface of unit hemisphere in space of principal stresses which was needed for computation of probability of failure with inclusion of all principal stresses. The influence of imperfection from nominal conicity on probability of failure of the head hip joint endoprothesis was calculated and the relative difference between the results of Weibull's weakest link theory with the inclusion of one or all three principal stressed was analyzed.
[klicova_slova_en] => ceramic; Weibull's weakest link theory; probability of failure; Gaussian quadrature; head of hip joint
endoprothesis; sensors; measurement
[vysledek_datum] => 2018-12-05T00:00:00+01:00
)
[3] => Array
(
[vysledek_id] => 166380
[vysledek_druh_id] => ARTWOS
[ex_vysledek_id] => 138076
[vysledek_rok] => 2021
[nazev] => Failure properties of abdominal aortic aneurysm tissue are orientation dependent
[nazev_orig] => Failure properties of abdominal aortic aneurysm tissue are orientation dependent
[duvernost_udaju_id] => S
[popis] => Introduction: Biomechanical rupture risk assessment of abdominal aortic aneurysm (AAA) requires information about failure properties of aneurysmal tissue. There are large differences between reported values. Among others, studies vary in using either axially or circumferentially oriented samples. This study investigates the effect of sample orientation on failure properties.
Methods: Aneurysmal tissues from 45 patients (11 females) were harvested during open AAA repair, cut into uniaxial samples (90) and tested mechanically within 3 h. If possible, the samples were cut in both axial (49 samples) and circumferential (41 samples) directions. Wall thickness, First Piola-Kirchhoff strength P-ult and ultimate tension T-ult were recorded. Influence of sample orientation and other clinical parameters were investigated using non parametric tests.
Results: Medians of Pull (values 1100 kPa for circumferential vs. 715 kPa for axial direction, p < 10(-4)) and T-ult (17.4 N/cm in circumferential vs. 11.2 N/cm in axial direction, p < 10(-4)) were significantly higher in circumferential direction. For paired data, the median of difference was 411 kPa (p < 10(-3)) in P-ult, and 7.4 N/cm < 10(-4)) in T-ult in favor of circumferential direction.
Conclusions: In this first study of anisotropy in AAA wall failure properties using paired comparisons, the strength in circumferential orientation was found to be higher than in axial orientation.
[popis_orig] => Introduction: Biomechanical rupture risk assessment of abdominal aortic aneurysm (AAA) requires information about failure properties of aneurysmal tissue. There are large differences between reported values. Among others, studies vary in using either axially or circumferentially oriented samples. This study investigates the effect of sample orientation on failure properties.
Methods: Aneurysmal tissues from 45 patients (11 females) were harvested during open AAA repair, cut into uniaxial samples (90) and tested mechanically within 3 h. If possible, the samples were cut in both axial (49 samples) and circumferential (41 samples) directions. Wall thickness, First Piola-Kirchhoff strength P-ult and ultimate tension T-ult were recorded. Influence of sample orientation and other clinical parameters were investigated using non parametric tests.
Results: Medians of Pull (values 1100 kPa for circumferential vs. 715 kPa for axial direction, p < 10(-4)) and T-ult (17.4 N/cm in circumferential vs. 11.2 N/cm in axial direction, p < 10(-4)) were significantly higher in circumferential direction. For paired data, the median of difference was 411 kPa (p < 10(-3)) in P-ult, and 7.4 N/cm < 10(-4)) in T-ult in favor of circumferential direction.
Conclusions: In this first study of anisotropy in AAA wall failure properties using paired comparisons, the strength in circumferential orientation was found to be higher than in axial orientation.
[klicova_slova] => Abdominal aortic aneurysm, Failure properties, Mechanical testing, Sample orientation
[klicova_slova_orig] => Abdominal aortic aneurysm, Failure properties, Mechanical testing, Sample orientation
[url] => https://www-sciencedirect-com.ezproxy.lib.vutbr.cz/science/article/pii/S1751616120307232
[oecd_obor_id] => 20602
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[odpovedny_utvar_zkratka] => ÚMTMB
[nadrazena_soucast_id] => 4
[nadrazena_soucast_zkratka] => FSI
[nadrazena_soucast_nazev] => Fakulta strojního inženýrství
[originalni_jazyk] => en
[schvalil_id] => 107598
[schvaleno] => 2022-03-17
[vykazovat_riv] => 1
[vykazovat_riv_zmeny] => 1
[slozka_id] =>
[posledni_diagnostika] =>
[vycet_osob] => POLZER, S.; MAN, V.; VLACHOVSKÝ, R.; KUBÍČEK, L.; KRACÍK, J.; STAFFA, R.; NOVOTNÝ, T.; BURŠA, J.; RAGHAVAN, M.
[pocet_tvurcu] => 9
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[poznamka] =>
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[kod_doi] => 10.1016/j.jmbbm.2020.104181
[kod_dspace] =>
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[zverejneno] => 1
[prvni_autor] =>
[korespondencni_autor] =>
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[znamka] =>
[kategorie_nazev] => Publikační výsledky
[druh_nazev] => Článek WoS
[druh_popis] => Článek v odborném periodiku je obsažen v databázi Web of Science společností Thomson Reuters s příznakem „Article“, „Review“ nebo „Letter“
[stav] => Schválený
[vysledek_kategorie_id] => PV
[vysledek_system_kategorie_id] => PU
[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] => ISSN 1751-6161
[identifikator_popis] => ISSN - Journal of the Mechanical Behavior of Biomedical Materials (NL)
[riv_dodavka_id] => 2881
[riv_dodavka_oznaceni] => RIV21-MSM-26210___
[riv_dodavka_rok] => 2021
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[diagnostika_pocet_chyba] => 0
[diagnostika_pocet_upozorneni] => 0
[diagnostika_pocet_informace] => 1
[citace_text] => POLZER, S.; MAN, V.; VLACHOVSKÝ, R.; KUBÍČEK, L.; KRACÍK, J.; STAFFA, R.; NOVOTNÝ, T.; BURŠA, J.; RAGHAVAN, M. Failure properties of abdominal aortic aneurysm tissue are orientation dependent. Journal of the Mechanical Behavior of Biomedical Materials, 2021, vol. 114, no. 1, p. 1-7. ISSN: 1751-6161.
[citace_html] => POLZER, S.; MAN, V.; VLACHOVSKÝ, R.; KUBÍČEK, L.; KRACÍK, J.; STAFFA, R.; NOVOTNÝ, T.; BURŠA, J.; RAGHAVAN, M. Failure properties of abdominal aortic aneurysm tissue are orientation dependent. Journal of the Mechanical Behavior of Biomedical Materials, 2021, vol. 114, no. 1, p. 1-7. ISSN: 1751-6161.
[citace_rtf] =>
[citace_bibtex] => @article{BUT166380,
author="Stanislav {Polzer} and Vojtěch {Man} and Robert {Vlachovský} and Luboš {Kubíček} and Jan {Kracík} and Robert {Staffa} and Tomáš {Novotný} and Jiří {Burša} and Madhavan Lakshmi {Raghavan}",
title="Failure properties of abdominal aortic aneurysm tissue are orientation dependent",
journal="Journal of the Mechanical Behavior of Biomedical Materials",
year="2021",
volume="114",
number="1",
pages="1--7",
doi="10.1016/j.jmbbm.2020.104181",
issn="1751-6161",
url="https://www-sciencedirect-com.ezproxy.lib.vutbr.cz/science/article/pii/S1751616120307232"
}
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[oecd_tree_obor_nazev] => 2.6 Medical engineering
[oecd_tree_podobor_id] => 20602
[oecd_tree_podobor_nazev] => Medical laboratory technology (including laboratory samples analysis; diagnostic technologies) (Biomaterials to be 2.9 [physical characteristics of living material as related to medical implants, devices, sensors])
[poznamka_metriky] =>
[nazev_en] => Failure properties of abdominal aortic aneurysm tissue are orientation dependent
[popis_en] => Introduction: Biomechanical rupture risk assessment of abdominal aortic aneurysm (AAA) requires information about failure properties of aneurysmal tissue. There are large differences between reported values. Among others, studies vary in using either axially or circumferentially oriented samples. This study investigates the effect of sample orientation on failure properties.
Methods: Aneurysmal tissues from 45 patients (11 females) were harvested during open AAA repair, cut into uniaxial samples (90) and tested mechanically within 3 h. If possible, the samples were cut in both axial (49 samples) and circumferential (41 samples) directions. Wall thickness, First Piola-Kirchhoff strength P-ult and ultimate tension T-ult were recorded. Influence of sample orientation and other clinical parameters were investigated using non parametric tests.
Results: Medians of Pull (values 1100 kPa for circumferential vs. 715 kPa for axial direction, p < 10(-4)) and T-ult (17.4 N/cm in circumferential vs. 11.2 N/cm in axial direction, p < 10(-4)) were significantly higher in circumferential direction. For paired data, the median of difference was 411 kPa (p < 10(-3)) in P-ult, and 7.4 N/cm < 10(-4)) in T-ult in favor of circumferential direction.
Conclusions: In this first study of anisotropy in AAA wall failure properties using paired comparisons, the strength in circumferential orientation was found to be higher than in axial orientation.
[klicova_slova_en] => Abdominal aortic aneurysm, Failure properties, Mechanical testing, Sample orientation
[vysledek_datum] => 2021-02-01T00:00:00+01:00
)
[4] => Array
(
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[ex_vysledek_id] => 33332
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[nazev_orig] => Virtuální dvojče uložení strojního celku na pohybovém šroubu
[duvernost_udaju_id] => S
[popis] => Virtuální dvojče uložení strojního celku na pohybovém šroubu slouží k zlepšení procesu obrábění pomocí změny tuhosti v místě lunety.
[popis_orig] => Virtuální dvojče uložení strojního celku na pohybovém šroubu slouží k zlepšení procesu obrábění pomocí změny tuhosti v místě lunety.
[klicova_slova] => virtuální dvojče
[klicova_slova_orig] => virtuální dvojče
[url] => http://www.umt.fme.vutbr.cz/images/projekty/TN01000071_02-V15_popis.pdf
[oecd_obor_id] => 20302
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[nadrazena_soucast_zkratka] => FSI
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[schvalil_id] => 2505
[schvaleno] => 2021-02-02
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[druh_popis] => Funkční vzorek
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[diagnostika_pocet_upozorneni] => 0
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[citace_text] => HOUFEK, L.; FUIS, V.: Virtuální dvojče uložení strojního celku na pohybovém šroubu. URL: http://www.umt.fme.vutbr.cz/images/projekty/TN01000071_02-V15_popis.pdf. (Funkční vzorek)
[citace_html] => HOUFEK, L.; FUIS, V.: Virtuální dvojče uložení strojního celku na pohybovém šroubu. URL: http://www.umt.fme.vutbr.cz/images/projekty/TN01000071_02-V15_popis.pdf. (Funkční vzorek)
[citace_rtf] =>
[citace_bibtex] => @misc{BUT166398,
author="Lubomír {Houfek} and Vladimír {Fuis}",
title="Virtuální dvojče uložení strojního celku na pohybovém šroubu",
year="2020",
url="http://www.umt.fme.vutbr.cz/images/projekty/TN01000071_02-V15_popis.pdf",
note="Functioning sample"
}
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[oecd_tree_podobor_id] => 20302
[oecd_tree_podobor_nazev] => Applied mechanics
[poznamka_metriky] =>
[nazev_en] => Virtual twin bearing machine on the moving screw
[popis_en] => The virtual twin bearing of the machine unit on the moving screw serves to improve the machining process by changing the stiffness at the bezel.
[klicova_slova_en] => virtual twin
[vysledek_datum] => 2020-12-15T00:00:00+01:00
)
[5] => Array
(
[vysledek_id] => 167281
[vysledek_druh_id] => VZ
[ex_vysledek_id] => 34126
[vysledek_rok] => 2020
[nazev] => Virtuální dvojče servopohonu
[nazev_orig] => Virtuální dvojče servopohonu
[duvernost_udaju_id] => S
[popis] => Virtuální dvojče synchronního stroje s permanentními magnety na rotoru . Vytvořený výpočetní model se skládá ze tří hlavních součástí – elektromagnetismus, teplo a mechanika.
[popis_orig] => Virtuální dvojče synchronního stroje s permanentními magnety na rotoru . Vytvořený výpočetní model se skládá ze tří hlavních součástí – elektromagnetismus, teplo a mechanika.
[klicova_slova] => virtuální dvojče, synchronní motor, vázaný model
[klicova_slova_orig] => virtuální dvojče, synchronní motor, vázaný model
[url] => http://www.umt.fme.vutbr.cz/images/projekty/TN01000071_02-V18_popis.pdf
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[slozka_id] =>
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[citace_text] => VLACH, R.; MUSIL, F.: Virtuální dvojče servopohonu. URL: http://www.umt.fme.vutbr.cz/images/projekty/TN01000071_02-V18_popis.pdf. (Funkční vzorek)
[citace_html] => VLACH, R.; MUSIL, F.: Virtuální dvojče servopohonu. URL: http://www.umt.fme.vutbr.cz/images/projekty/TN01000071_02-V18_popis.pdf. (Funkční vzorek)
[citace_rtf] =>
[citace_bibtex] => @misc{BUT167281,
author="Radek {Vlach} and Filip {Musil}",
title="Virtuální dvojče servopohonu",
year="2020",
url="http://www.umt.fme.vutbr.cz/images/projekty/TN01000071_02-V18_popis.pdf",
note="Functioning sample"
}
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[poznamka_metriky] =>
[nazev_en] => Virtual twin of the actuator
[popis_en] => Virtual twin of a synchronous machine with permanent magnets on the rotor. The created computational model consists of three main components - electromagnetism, heat and mechanics.
[klicova_slova_en] => Virtual twin, synchronnous masine, coupled model
[vysledek_datum] => 2020-11-30T00:00:00+01:00
)
[6] => Array
(
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[nazev] => Energy Harvesting Technologies for Structural Health Monitoring of Airplane Components-A Review
[nazev_orig] => Energy Harvesting Technologies for Structural Health Monitoring of Airplane Components-A Review
[duvernost_udaju_id] => S
[popis] => With the aim of increasing the efficiency of maintenance and fuel usage in airplanes, structural health monitoring (SHM) of critical composite structures is increasingly expected and required. The optimized usage of this concept is subject of intensive work in the framework of the EU COST Action CA18203 "Optimising Design for Inspection" (ODIN). In this context, a thorough review of a broad range of energy harvesting (EH) technologies to be potentially used as power sources for the acoustic emission and guided wave propagation sensors of the considered SHM systems, as well as for the respective data elaboration and wireless communication modules, is provided in this work. EH devices based on the usage of kinetic energy, thermal gradients, solar radiation, airflow, and other viable energy sources, proposed so far in the literature, are thus described with a critical review of the respective specific power levels, of their potential placement on airplanes, as well as the consequently necessary power management architectures. The guidelines provided for the selection of the most appropriate EH and power management technologies create the preconditions to develop a new class of autonomous sensor nodes for the in-process, non-destructive SHM of airplane components.
[popis_orig] => With the aim of increasing the efficiency of maintenance and fuel usage in airplanes, structural health monitoring (SHM) of critical composite structures is increasingly expected and required. The optimized usage of this concept is subject of intensive work in the framework of the EU COST Action CA18203 "Optimising Design for Inspection" (ODIN). In this context, a thorough review of a broad range of energy harvesting (EH) technologies to be potentially used as power sources for the acoustic emission and guided wave propagation sensors of the considered SHM systems, as well as for the respective data elaboration and wireless communication modules, is provided in this work. EH devices based on the usage of kinetic energy, thermal gradients, solar radiation, airflow, and other viable energy sources, proposed so far in the literature, are thus described with a critical review of the respective specific power levels, of their potential placement on airplanes, as well as the consequently necessary power management architectures. The guidelines provided for the selection of the most appropriate EH and power management technologies create the preconditions to develop a new class of autonomous sensor nodes for the in-process, non-destructive SHM of airplane components.
[klicova_slova] => energy harvesting; airplane; non-destructive evaluation; kinetic; thermoelectric; solar; smart skin; power management
[klicova_slova_orig] => energy harvesting; airplane; non-destructive evaluation; kinetic; thermoelectric; solar; smart skin; power management
[url] => https://www.mdpi.com/1424-8220/20/22/6685
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[vycet_osob] => HADAŠ, Z.; HLINKA, J.; JANÁK, L.; KŠICA, F.; RUBEŠ, O.; ŠEVEČEK, O.; TOFEL, P.
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[citace_text] => HADAŠ, Z.; HLINKA, J.; JANÁK, L.; KŠICA, F.; RUBEŠ, O.; ŠEVEČEK, O.; TOFEL, P. Energy Harvesting Technologies for Structural Health Monitoring of Airplane Components-A Review. SENSORS, 2020, vol. 20, no. 22, p. 1-57. ISSN: 1424-8220.
[citace_html] => HADAŠ, Z.; HLINKA, J.; JANÁK, L.; KŠICA, F.; RUBEŠ, O.; ŠEVEČEK, O.; TOFEL, P. Energy Harvesting Technologies for Structural Health Monitoring of Airplane Components-A Review. SENSORS, 2020, vol. 20, no. 22, p. 1-57. ISSN: 1424-8220.
[citace_rtf] =>
[citace_bibtex] => @article{BUT167299,
author="Zdeněk {Hadaš} and Jiří {Hlinka} and Luděk {Janák} and Filip {Kšica} and Ondřej {Rubeš} and Oldřich {Ševeček} and Pavel {Tofel}",
title="Energy Harvesting Technologies for Structural Health Monitoring of Airplane Components-A Review",
journal="SENSORS",
year="2020",
volume="20",
number="22",
pages="1--57",
doi="10.3390/s20226685",
url="https://www.mdpi.com/1424-8220/20/22/6685"
}
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[nazev_en] => Energy Harvesting Technologies for Structural Health Monitoring of Airplane Components-A Review
[popis_en] => With the aim of increasing the efficiency of maintenance and fuel usage in airplanes, structural health monitoring (SHM) of critical composite structures is increasingly expected and required. The optimized usage of this concept is subject of intensive work in the framework of the EU COST Action CA18203 "Optimising Design for Inspection" (ODIN). In this context, a thorough review of a broad range of energy harvesting (EH) technologies to be potentially used as power sources for the acoustic emission and guided wave propagation sensors of the considered SHM systems, as well as for the respective data elaboration and wireless communication modules, is provided in this work. EH devices based on the usage of kinetic energy, thermal gradients, solar radiation, airflow, and other viable energy sources, proposed so far in the literature, are thus described with a critical review of the respective specific power levels, of their potential placement on airplanes, as well as the consequently necessary power management architectures. The guidelines provided for the selection of the most appropriate EH and power management technologies create the preconditions to develop a new class of autonomous sensor nodes for the in-process, non-destructive SHM of airplane components.
[klicova_slova_en] => energy harvesting; airplane; non-destructive evaluation; kinetic; thermoelectric; solar; smart skin; power management
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(
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[nazev] => Měřící systém lisů na úpravu železničních soukolí
[nazev_orig] => Měřící systém lisů na úpravu železničních soukolí
[duvernost_udaju_id] => S
[popis] => Vytvořený výsledek „Měřící systém lisů na úpravu železničních soukolí“ představuje funkční vzorek pro následný modulární systém pro hydraulické lisy železničních soukolí vyvíjených a vyráběných účastníkem projektu společností ŽĎAS a.s. Tento modulární systém nahradí dosud používanou soustavu ručních přípravků s dotykovými čidly automatizovaným systémem s laserovými senzory a velmi přesným odměřováním.
Původní ruční přípravky bylo nutné vyrábět na míru pro každý měření rozměr všech typů soukolí a bylo je nutné často kalibrovat. Celý systém tak byl velmi nákladný, náročný na obsluhu a v některých případech nedosahoval požadovaných přesností.
Nově vyvinutý systém je tvořen dvouosým vedením, které lze umístit k libovolnému lisu. Na obou osách vedení jsou velmi přesné magnetické enkodéry a vedení polohuje dvojici přesných laserových senzorů. Konstrukce vedení byla s využitím citlivostní analýzy statického modelu, který uvažuje všechny významných nepřesnosti, konstrukční odchylky a vlivy senzorů, navrženo tak, aby jako celek dosahovalo požadované přesnosti odměřování lepší než 0,05mm po v celém pracovním prostoru lisu – tedy na vzdálenostech až 3 m.
[popis_orig] => Vytvořený výsledek „Měřící systém lisů na úpravu železničních soukolí“ představuje funkční vzorek pro následný modulární systém pro hydraulické lisy železničních soukolí vyvíjených a vyráběných účastníkem projektu společností ŽĎAS a.s. Tento modulární systém nahradí dosud používanou soustavu ručních přípravků s dotykovými čidly automatizovaným systémem s laserovými senzory a velmi přesným odměřováním.
Původní ruční přípravky bylo nutné vyrábět na míru pro každý měření rozměr všech typů soukolí a bylo je nutné často kalibrovat. Celý systém tak byl velmi nákladný, náročný na obsluhu a v některých případech nedosahoval požadovaných přesností.
Nově vyvinutý systém je tvořen dvouosým vedením, které lze umístit k libovolnému lisu. Na obou osách vedení jsou velmi přesné magnetické enkodéry a vedení polohuje dvojici přesných laserových senzorů. Konstrukce vedení byla s využitím citlivostní analýzy statického modelu, který uvažuje všechny významných nepřesnosti, konstrukční odchylky a vlivy senzorů, navrženo tak, aby jako celek dosahovalo požadované přesnosti odměřování lepší než 0,05mm po v celém pracovním prostoru lisu – tedy na vzdálenostech až 3 m.
[klicova_slova] => železniční soukolí; hydraulický lis; měření vzdálenosti; automatizace
[klicova_slova_orig] => železniční soukolí; hydraulický lis; měření vzdálenosti; automatizace
[url] => http://www.umt.fme.vutbr.cz/images/projekty/TN01000071_02-V9_popis.pdf
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[originalni_jazyk] => cs
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[schvaleno] => 2021-03-08
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[vycet_osob] => BRABLC, M.; MLYNÁŘ, V.; GREPL, R.; MELICHAR, R.; POSPÍCHAL, P.
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[citace_text] => BRABLC, M.; MLYNÁŘ, V.; GREPL, R.; MELICHAR, R.; POSPÍCHAL, P.: Měřící systém lisů na úpravu železničních soukolí. URL: http://www.umt.fme.vutbr.cz/images/projekty/TN01000071_02-V9_popis.pdf. (Funkční vzorek)
[citace_html] => BRABLC, M.; MLYNÁŘ, V.; GREPL, R.; MELICHAR, R.; POSPÍCHAL, P.: Měřící systém lisů na úpravu železničních soukolí. URL: http://www.umt.fme.vutbr.cz/images/projekty/TN01000071_02-V9_popis.pdf. (Funkční vzorek)
[citace_rtf] =>
[citace_bibtex] => @misc{BUT167307,
author="Martin {Brablc} and Vojtěch {Mlynář} and Robert {Grepl} and Radek {Melichar} and Pavel {Pospíchal}",
title="Měřící systém lisů na úpravu železničních soukolí",
year="2020",
url="http://www.umt.fme.vutbr.cz/images/projekty/TN01000071_02-V9_popis.pdf",
note="Functioning sample"
}
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[oecd_tree_podobor_nazev] => Applied mechanics
[poznamka_metriky] =>
[nazev_en] => Measuring system for railroad wheelset hydraulic pressing
[popis_en] => The developed result "Measuring system for railroad wheelset hydrailic pressing" represents a functional sample for the subsequent modular system for hydraulic presses of railway wheelsets developed and manufactured by the project participant ŽĎAS a.s. This modular system replaces the previously used system of hand-held devices with touch sensors with an automated system with laser sensors and very accurate distance measuring.
The original hand fixtures had to be specifically made for each size and type of wheelset and had to be calibrated frequently. The whole system was very expensive, difficult to operate and in some cases did not achieve the required accuracy.
The newly developed system consists of a two-axis guide that can be placed next to any press. There are very precise magnetic encoders on both axes of the guide and the guide positions a pair of precise laser sensors. Using sensitivity analysis of a static model that takes into account all significant inaccuracies, design deviations and sensor influences, it was designed to achieve the required measuring accuracy of better than 0.05 mm throughout the press work space - at distances of up to 3 m. .
[klicova_slova_en] => railroad wheelset; hydraulic press; distance measurement; automation
[vysledek_datum] => 2020-10-30T00:00:00+01:00
)
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(
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[nazev] => Low data loss point cloud to multi-line conversion and union
[nazev_orig] => Low data loss point cloud to multi-line conversion and union
[duvernost_udaju_id] => S
[popis] => Union of point clouds converted into lines is basically impossible nowadays. In big area mapping task, there is a problem how to represent scanned data. A point cloud is basic output from almost every mapping and environment scanning system, but as the area grows, there comes need for huge data storage and also the computation cost starts to grow rapidly. On the other side, curve representation is simple and easy to process, but all other data from point cloud get lost and further actualization of curve is basically impossible. In this article we present algorithms of robust procedure which can transfer point-cloud to curve and data. The final goal is to achieve the same result for two curves which are merged, as if two point-clouds were merged and transferred to curve.
[popis_orig] => Union of point clouds converted into lines is basically impossible nowadays. In big area mapping task, there is a problem how to represent scanned data. A point cloud is basic output from almost every mapping and environment scanning system, but as the area grows, there comes need for huge data storage and also the computation cost starts to grow rapidly. On the other side, curve representation is simple and easy to process, but all other data from point cloud get lost and further actualization of curve is basically impossible. In this article we present algorithms of robust procedure which can transfer point-cloud to curve and data. The final goal is to achieve the same result for two curves which are merged, as if two point-clouds were merged and transferred to curve.
[klicova_slova] => point cloud, line approximation, mapping, SLAM, multi-agent system, multi-robot system
[klicova_slova_orig] => point cloud, line approximation, mapping, SLAM, multi-agent system, multi-robot system
[url] =>
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[originalni_jazyk] => en
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[schvaleno] => 2022-03-16
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[vycet_osob] => KRÁLÍK, J.; VENGLÁŘ, V.
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[identifikator] => ISBN 978-1-7281-5600-2
[identifikator_popis] => ISBN - Proceedings of the 2020 19th International Conference on Mechatronics - Mechatronika (ME)
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[citace_text] => KRÁLÍK, J.; VENGLÁŘ, V. Low data loss point cloud to multi-line conversion and union. In Proceedings of the 2020 19th International Conference on Mechatronics - Mechatronika (ME). 1st edition. 2020. p. 1-4. ISBN: 978-1-7281-5600-2.
[citace_html] => KRÁLÍK, J.; VENGLÁŘ, V. Low data loss point cloud to multi-line conversion and union. In Proceedings of the 2020 19th International Conference on Mechatronics - Mechatronika (ME). 1st edition. 2020. p. 1-4. ISBN: 978-1-7281-5600-2.
[citace_rtf] =>
[citace_bibtex] => @inproceedings{BUT167315,
author="Jan {Králík} and Vojtěch {Venglář}",
title="Low data loss point cloud to multi-line conversion and union",
booktitle="Proceedings of the 2020 19th International Conference on Mechatronics - Mechatronika (ME)",
year="2020",
series="1st edition",
pages="1--4",
doi="10.1109/ME49197.2020.9286714",
isbn="978-1-7281-5600-2"
}
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[citace_text] => NYTRA, M.; KUBÍK, P.; PETRUŠKA, J.; ŠEBEK, F. A Fully Coupled Thermomechanical Damage Analysis of Hot Closed Die Forging Using Finite Element Modeling. JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE, 2020, vol. 29, no. 12, p. 8236-8246. ISSN: 1059-9495.
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