Crack onset in stretched open hole PMMA plates considering linear and non-linear elastic behaviours
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10400.21/13779 |
Resumo: | Crack onset in PMMA holed plates subjected to tensile stresses is studied experimentally and by the coupled stress and energy criterion of the Finite Fracture Mechanics (CCFFM). The elastic, strength and fracture properties of PMMA are determined by the standard tests, a clearly nonlinear stress-strain relation being identified in the tensile tests. Thus, a novel numerical implementation of the CCFFM considering a non-linear elastic (NLE) material model, using the Ramberg-Osgood approximation, in addition to the usually used linear elastic (LE) model, is developed. Testing of plates with different hole sizes shows a hole size effect in the nominal failure load as expected. For a better fitting of the experimental results, higher strength values obtained by three point bending (TPB) flatwise and edgewise coupons (without any notch), for these material models, are used, apparently for the first time, in the CCFFM predictions. This approach reflects the observation that the strength values associated to smaller but highly stressed volumes, like those located at stress maxima in the holed plates and TPB specimens, are higher. For finite-width holed plates and both material behaviours, suitable FEM models are developed to implement the CCFFM for both LE and NLE models, considering plane stress state. Moreover, an inverse procedure is devised, using the experimental data for holed plates and predictions by CCFFM, to estimate the strength and fracture properties to be used in both material models, providing very good correlations of the CCFFM predictions with the experimental results. |
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Crack onset in stretched open hole PMMA plates considering linear and non-linear elastic behavioursFinite fracture mechanicsCoupled criterionCrack onsetPMMAPlates with holes in tensionStress concentrationNon-linear elastic materialCrack onset in PMMA holed plates subjected to tensile stresses is studied experimentally and by the coupled stress and energy criterion of the Finite Fracture Mechanics (CCFFM). The elastic, strength and fracture properties of PMMA are determined by the standard tests, a clearly nonlinear stress-strain relation being identified in the tensile tests. Thus, a novel numerical implementation of the CCFFM considering a non-linear elastic (NLE) material model, using the Ramberg-Osgood approximation, in addition to the usually used linear elastic (LE) model, is developed. Testing of plates with different hole sizes shows a hole size effect in the nominal failure load as expected. For a better fitting of the experimental results, higher strength values obtained by three point bending (TPB) flatwise and edgewise coupons (without any notch), for these material models, are used, apparently for the first time, in the CCFFM predictions. This approach reflects the observation that the strength values associated to smaller but highly stressed volumes, like those located at stress maxima in the holed plates and TPB specimens, are higher. For finite-width holed plates and both material behaviours, suitable FEM models are developed to implement the CCFFM for both LE and NLE models, considering plane stress state. Moreover, an inverse procedure is devised, using the experimental data for holed plates and predictions by CCFFM, to estimate the strength and fracture properties to be used in both material models, providing very good correlations of the CCFFM predictions with the experimental results.ElsevierRCIPLLeite, AfonsoMantic, V.Paris, F.2021-09-22T10:51:34Z2021-082021-08-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.21/13779engLEITE, Afonso; MANTIC, V.; PARIS, F. – Crack onset in stretched open hole PMMA plates considering linear and non-linear elastic behaviours. Theoretical and Applied Fracture Mechanics. ISSN 0167-8442. Vol. 114 (2021), pp. 1-190167-844210.1016/j.tafmec.2021.1029311872-7638metadata only accessinfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-08-03T10:09:01Zoai:repositorio.ipl.pt:10400.21/13779Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T20:21:39.993319Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Crack onset in stretched open hole PMMA plates considering linear and non-linear elastic behaviours |
title |
Crack onset in stretched open hole PMMA plates considering linear and non-linear elastic behaviours |
spellingShingle |
Crack onset in stretched open hole PMMA plates considering linear and non-linear elastic behaviours Leite, Afonso Finite fracture mechanics Coupled criterion Crack onset PMMA Plates with holes in tension Stress concentration Non-linear elastic material |
title_short |
Crack onset in stretched open hole PMMA plates considering linear and non-linear elastic behaviours |
title_full |
Crack onset in stretched open hole PMMA plates considering linear and non-linear elastic behaviours |
title_fullStr |
Crack onset in stretched open hole PMMA plates considering linear and non-linear elastic behaviours |
title_full_unstemmed |
Crack onset in stretched open hole PMMA plates considering linear and non-linear elastic behaviours |
title_sort |
Crack onset in stretched open hole PMMA plates considering linear and non-linear elastic behaviours |
author |
Leite, Afonso |
author_facet |
Leite, Afonso Mantic, V. Paris, F. |
author_role |
author |
author2 |
Mantic, V. Paris, F. |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
RCIPL |
dc.contributor.author.fl_str_mv |
Leite, Afonso Mantic, V. Paris, F. |
dc.subject.por.fl_str_mv |
Finite fracture mechanics Coupled criterion Crack onset PMMA Plates with holes in tension Stress concentration Non-linear elastic material |
topic |
Finite fracture mechanics Coupled criterion Crack onset PMMA Plates with holes in tension Stress concentration Non-linear elastic material |
description |
Crack onset in PMMA holed plates subjected to tensile stresses is studied experimentally and by the coupled stress and energy criterion of the Finite Fracture Mechanics (CCFFM). The elastic, strength and fracture properties of PMMA are determined by the standard tests, a clearly nonlinear stress-strain relation being identified in the tensile tests. Thus, a novel numerical implementation of the CCFFM considering a non-linear elastic (NLE) material model, using the Ramberg-Osgood approximation, in addition to the usually used linear elastic (LE) model, is developed. Testing of plates with different hole sizes shows a hole size effect in the nominal failure load as expected. For a better fitting of the experimental results, higher strength values obtained by three point bending (TPB) flatwise and edgewise coupons (without any notch), for these material models, are used, apparently for the first time, in the CCFFM predictions. This approach reflects the observation that the strength values associated to smaller but highly stressed volumes, like those located at stress maxima in the holed plates and TPB specimens, are higher. For finite-width holed plates and both material behaviours, suitable FEM models are developed to implement the CCFFM for both LE and NLE models, considering plane stress state. Moreover, an inverse procedure is devised, using the experimental data for holed plates and predictions by CCFFM, to estimate the strength and fracture properties to be used in both material models, providing very good correlations of the CCFFM predictions with the experimental results. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-09-22T10:51:34Z 2021-08 2021-08-01T00:00:00Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10400.21/13779 |
url |
http://hdl.handle.net/10400.21/13779 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
LEITE, Afonso; MANTIC, V.; PARIS, F. – Crack onset in stretched open hole PMMA plates considering linear and non-linear elastic behaviours. Theoretical and Applied Fracture Mechanics. ISSN 0167-8442. Vol. 114 (2021), pp. 1-19 0167-8442 10.1016/j.tafmec.2021.102931 1872-7638 |
dc.rights.driver.fl_str_mv |
metadata only access info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
metadata only access |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Elsevier |
publisher.none.fl_str_mv |
Elsevier |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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1799133488153100288 |