Pressure dependent yield criteria applied for improving design practices and integrity assessments against yielding of engineering polymers
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Data de Publicação: | 2012 |
Outros Autores: | |
Tipo de documento: | Artigo |
Título da fonte: | Biblioteca Digital de Teses e Dissertações da FEI |
Texto Completo: | https://repositorio.fei.edu.br/handle/FEI/2012 |
Resumo: | Conventional yield criteria for ductile materials, such as Tresca and von Mises, predict that yielding is independent on the hydrostatic stress state (pressure), which means that tensile and compressive stress-strain behaviors are considered equal and are equally treated. This approach is reasonable for ductile metallic materials but sometimes inaccurate for polymers, which commonly present larger compressive yield strength, therefore being characterized as uneven. Some pressure dependent theories are available, but there is no consensus concerning the choice of the most appropriate criterion, its use and benefits. As a step in the direction of improving structural integrity practices taking advantage of unevenness, this work performs three key-activities: i) first, a critical review about existing theories and its accuracy; ii) second, a series of experiments under tension and compression including four selected polymers (PA-66, PA-6, PP, and HDPE) to assess real unevenness levels; iii) third, a numerical evaluation of the potential benefits of using modified criteria. Stress states, safety, and stiffness were evaluated for a typical application to illustrate the proposals. Mass reductions up to 39% could be achieved even with simple geometric changes, while keeping original safety and stiffness levels. © 2012 Elsevier Editora Ltda. and Brazilian Metallurgical, Materials and Mining Association. |
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Donato G.H.B.Bianchi M.2019-08-20T00:13:16Z2019-08-20T00:13:16Z2012DONATO, Gustavo; BIANCHI, M.. Pressure Dependent Yield Criteria Applied for Improving Design Practices and Integrity Assessments against Yielding of Engineering Polymers. Journal of Materials Research and Technology, v. 1, n. 1, p. 2-7, 2012.2238-7854https://repositorio.fei.edu.br/handle/FEI/201210.1016/S2238-7854(12)70002-9Conventional yield criteria for ductile materials, such as Tresca and von Mises, predict that yielding is independent on the hydrostatic stress state (pressure), which means that tensile and compressive stress-strain behaviors are considered equal and are equally treated. This approach is reasonable for ductile metallic materials but sometimes inaccurate for polymers, which commonly present larger compressive yield strength, therefore being characterized as uneven. Some pressure dependent theories are available, but there is no consensus concerning the choice of the most appropriate criterion, its use and benefits. As a step in the direction of improving structural integrity practices taking advantage of unevenness, this work performs three key-activities: i) first, a critical review about existing theories and its accuracy; ii) second, a series of experiments under tension and compression including four selected polymers (PA-66, PA-6, PP, and HDPE) to assess real unevenness levels; iii) third, a numerical evaluation of the potential benefits of using modified criteria. Stress states, safety, and stiffness were evaluated for a typical application to illustrate the proposals. Mass reductions up to 39% could be achieved even with simple geometric changes, while keeping original safety and stiffness levels. © 2012 Elsevier Editora Ltda. and Brazilian Metallurgical, Materials and Mining Association.1127Journal of Materials Research and TechnologyPressure dependent yield criteria applied for improving design practices and integrity assessments against yielding of engineering polymersinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleExperimental testingPressure dependent yield criteriaStructural improvementUneven polymersinfo:eu-repo/semantics/openAccessreponame:Biblioteca Digital de Teses e Dissertações da FEIinstname:Centro Universitário da Fundação Educacional Inaciana (FEI)instacron:FEI162-s2.0-84939121023Compressive stress-strain behaviorsEngineering polymersExperimental testingHydrostatic stress stateIntegrity assessmentStructural improvementsTension and compressionYield criteriahttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84939121023&origin=inward2022-06-01FEI/20122022-06-01 03:08:27.371Biblioteca Digital de Teses e Dissertaçõeshttp://sofia.fei.edu.br/pergamum/biblioteca/PRI |
dc.title.none.fl_str_mv |
Pressure dependent yield criteria applied for improving design practices and integrity assessments against yielding of engineering polymers |
title |
Pressure dependent yield criteria applied for improving design practices and integrity assessments against yielding of engineering polymers |
spellingShingle |
Pressure dependent yield criteria applied for improving design practices and integrity assessments against yielding of engineering polymers Donato G.H.B. Experimental testing Pressure dependent yield criteria Structural improvement Uneven polymers |
title_short |
Pressure dependent yield criteria applied for improving design practices and integrity assessments against yielding of engineering polymers |
title_full |
Pressure dependent yield criteria applied for improving design practices and integrity assessments against yielding of engineering polymers |
title_fullStr |
Pressure dependent yield criteria applied for improving design practices and integrity assessments against yielding of engineering polymers |
title_full_unstemmed |
Pressure dependent yield criteria applied for improving design practices and integrity assessments against yielding of engineering polymers |
title_sort |
Pressure dependent yield criteria applied for improving design practices and integrity assessments against yielding of engineering polymers |
author |
Donato G.H.B. |
author_facet |
Donato G.H.B. Bianchi M. |
author_role |
author |
author2 |
Bianchi M. |
author2_role |
author |
dc.contributor.author.fl_str_mv |
Donato G.H.B. Bianchi M. |
dc.subject.eng.fl_str_mv |
Experimental testing Pressure dependent yield criteria Structural improvement Uneven polymers |
topic |
Experimental testing Pressure dependent yield criteria Structural improvement Uneven polymers |
description |
Conventional yield criteria for ductile materials, such as Tresca and von Mises, predict that yielding is independent on the hydrostatic stress state (pressure), which means that tensile and compressive stress-strain behaviors are considered equal and are equally treated. This approach is reasonable for ductile metallic materials but sometimes inaccurate for polymers, which commonly present larger compressive yield strength, therefore being characterized as uneven. Some pressure dependent theories are available, but there is no consensus concerning the choice of the most appropriate criterion, its use and benefits. As a step in the direction of improving structural integrity practices taking advantage of unevenness, this work performs three key-activities: i) first, a critical review about existing theories and its accuracy; ii) second, a series of experiments under tension and compression including four selected polymers (PA-66, PA-6, PP, and HDPE) to assess real unevenness levels; iii) third, a numerical evaluation of the potential benefits of using modified criteria. Stress states, safety, and stiffness were evaluated for a typical application to illustrate the proposals. Mass reductions up to 39% could be achieved even with simple geometric changes, while keeping original safety and stiffness levels. © 2012 Elsevier Editora Ltda. and Brazilian Metallurgical, Materials and Mining Association. |
publishDate |
2012 |
dc.date.issued.fl_str_mv |
2012 |
dc.date.accessioned.fl_str_mv |
2019-08-20T00:13:16Z |
dc.date.available.fl_str_mv |
2019-08-20T00:13:16Z |
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.citation.fl_str_mv |
DONATO, Gustavo; BIANCHI, M.. Pressure Dependent Yield Criteria Applied for Improving Design Practices and Integrity Assessments against Yielding of Engineering Polymers. Journal of Materials Research and Technology, v. 1, n. 1, p. 2-7, 2012. |
dc.identifier.uri.fl_str_mv |
https://repositorio.fei.edu.br/handle/FEI/2012 |
dc.identifier.issn.none.fl_str_mv |
2238-7854 |
dc.identifier.doi.none.fl_str_mv |
10.1016/S2238-7854(12)70002-9 |
identifier_str_mv |
DONATO, Gustavo; BIANCHI, M.. Pressure Dependent Yield Criteria Applied for Improving Design Practices and Integrity Assessments against Yielding of Engineering Polymers. Journal of Materials Research and Technology, v. 1, n. 1, p. 2-7, 2012. 2238-7854 10.1016/S2238-7854(12)70002-9 |
url |
https://repositorio.fei.edu.br/handle/FEI/2012 |
dc.relation.ispartof.none.fl_str_mv |
Journal of Materials Research and Technology |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
reponame:Biblioteca Digital de Teses e Dissertações da FEI instname:Centro Universitário da Fundação Educacional Inaciana (FEI) instacron:FEI |
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Centro Universitário da Fundação Educacional Inaciana (FEI) |
instacron_str |
FEI |
institution |
FEI |
reponame_str |
Biblioteca Digital de Teses e Dissertações da FEI |
collection |
Biblioteca Digital de Teses e Dissertações da FEI |
repository.name.fl_str_mv |
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repository.mail.fl_str_mv |
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1734750992003497984 |