Revisiting the fracture forming limits of bulk forming under biaxial tension
Autor(a) principal: | |
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Data de Publicação: | 2022 |
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/10400.21/14472 |
Resumo: | The formability limits of bulk metal forming in principal strain space and in the effective strain vs. stress-triaxiality space are characterized by an uncertainty region in which cracks may be triggered by tension (mode I of fracture mechanics) or by out-of-plane shear (mode III). The problem in obtaining experimental data in this region has been known for a long time and the main objective of this paper is to present a new upset formability test geometry that can effectively contribute to the characterization of the formability limits of bulk metal forming parts subjected to biaxial tension. Alongside with this objective, this paper also presents an analytical expression for converting the fracture forming limit line corresponding to crack opening by mode III in principal strain space into a hyperbolic fracture limit curve in the effective strain vs. stress-triaxiality space. The overall methodology employed by the authors combines experimentation along with analytical and numerical modelling, and the contents of the paper is a step towards diminishing the actual lack of knowledge regarding failure by fracture in bulk metal forming parts subject to stress-triaxiality values beyond uniaxial tension. Results show that a new uncoupled ductile fracture criterion built upon combination of the integrands of the Cockcroft-Latham and McClintock criteria can be successfully used to model the physics of the bulk metal forming limits for the entire range of stress-triaxiality values corresponding to cracking on free surfaces. |
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Revisiting the fracture forming limits of bulk forming under biaxial tensionBulk formingFormability testsBiaxial tensionDuctile fractureExperimentationFinite element modellingThe formability limits of bulk metal forming in principal strain space and in the effective strain vs. stress-triaxiality space are characterized by an uncertainty region in which cracks may be triggered by tension (mode I of fracture mechanics) or by out-of-plane shear (mode III). The problem in obtaining experimental data in this region has been known for a long time and the main objective of this paper is to present a new upset formability test geometry that can effectively contribute to the characterization of the formability limits of bulk metal forming parts subjected to biaxial tension. Alongside with this objective, this paper also presents an analytical expression for converting the fracture forming limit line corresponding to crack opening by mode III in principal strain space into a hyperbolic fracture limit curve in the effective strain vs. stress-triaxiality space. The overall methodology employed by the authors combines experimentation along with analytical and numerical modelling, and the contents of the paper is a step towards diminishing the actual lack of knowledge regarding failure by fracture in bulk metal forming parts subject to stress-triaxiality values beyond uniaxial tension. Results show that a new uncoupled ductile fracture criterion built upon combination of the integrands of the Cockcroft-Latham and McClintock criteria can be successfully used to model the physics of the bulk metal forming limits for the entire range of stress-triaxiality values corresponding to cracking on free surfaces.Sage Publications Ltd.RCIPLSampaio, Rui F. V.Pragana, JoãoBragança, IvoSilva, CarlosMartins, Paulo2022-03-15T13:55:52Z2022-062022-06-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.21/14472engSAMPAIO, Rui F. V.; [et al] – Revisiting the fracture forming limits of bulk forming under biaxial tension. International Journal of Damage Mechanics. ISSN 1056-7895. Vol. 31, N.º 6 (2022), pp. 882-900.1056-789510.1177/105678952110725801530-7921metadata 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:RCAAP2023-08-03T10:10:41Zoai:repositorio.ipl.pt:10400.21/14472Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T20:22:16.455829Repositório 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 |
Revisiting the fracture forming limits of bulk forming under biaxial tension |
title |
Revisiting the fracture forming limits of bulk forming under biaxial tension |
spellingShingle |
Revisiting the fracture forming limits of bulk forming under biaxial tension Sampaio, Rui F. V. Bulk forming Formability tests Biaxial tension Ductile fracture Experimentation Finite element modelling |
title_short |
Revisiting the fracture forming limits of bulk forming under biaxial tension |
title_full |
Revisiting the fracture forming limits of bulk forming under biaxial tension |
title_fullStr |
Revisiting the fracture forming limits of bulk forming under biaxial tension |
title_full_unstemmed |
Revisiting the fracture forming limits of bulk forming under biaxial tension |
title_sort |
Revisiting the fracture forming limits of bulk forming under biaxial tension |
author |
Sampaio, Rui F. V. |
author_facet |
Sampaio, Rui F. V. Pragana, João Bragança, Ivo Silva, Carlos Martins, Paulo |
author_role |
author |
author2 |
Pragana, João Bragança, Ivo Silva, Carlos Martins, Paulo |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
RCIPL |
dc.contributor.author.fl_str_mv |
Sampaio, Rui F. V. Pragana, João Bragança, Ivo Silva, Carlos Martins, Paulo |
dc.subject.por.fl_str_mv |
Bulk forming Formability tests Biaxial tension Ductile fracture Experimentation Finite element modelling |
topic |
Bulk forming Formability tests Biaxial tension Ductile fracture Experimentation Finite element modelling |
description |
The formability limits of bulk metal forming in principal strain space and in the effective strain vs. stress-triaxiality space are characterized by an uncertainty region in which cracks may be triggered by tension (mode I of fracture mechanics) or by out-of-plane shear (mode III). The problem in obtaining experimental data in this region has been known for a long time and the main objective of this paper is to present a new upset formability test geometry that can effectively contribute to the characterization of the formability limits of bulk metal forming parts subjected to biaxial tension. Alongside with this objective, this paper also presents an analytical expression for converting the fracture forming limit line corresponding to crack opening by mode III in principal strain space into a hyperbolic fracture limit curve in the effective strain vs. stress-triaxiality space. The overall methodology employed by the authors combines experimentation along with analytical and numerical modelling, and the contents of the paper is a step towards diminishing the actual lack of knowledge regarding failure by fracture in bulk metal forming parts subject to stress-triaxiality values beyond uniaxial tension. Results show that a new uncoupled ductile fracture criterion built upon combination of the integrands of the Cockcroft-Latham and McClintock criteria can be successfully used to model the physics of the bulk metal forming limits for the entire range of stress-triaxiality values corresponding to cracking on free surfaces. |
publishDate |
2022 |
dc.date.none.fl_str_mv |
2022-03-15T13:55:52Z 2022-06 2022-06-01T00:00:00Z |
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/10400.21/14472 |
url |
http://hdl.handle.net/10400.21/14472 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
SAMPAIO, Rui F. V.; [et al] – Revisiting the fracture forming limits of bulk forming under biaxial tension. International Journal of Damage Mechanics. ISSN 1056-7895. Vol. 31, N.º 6 (2022), pp. 882-900. 1056-7895 10.1177/10567895211072580 1530-7921 |
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 |
Sage Publications Ltd. |
publisher.none.fl_str_mv |
Sage Publications Ltd. |
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) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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1799133494579822592 |