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Revisiting the fracture forming limits of bulk forming under biaxial tension

2022-06Journal article Restricted access
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dc.contributor.authorSampaio, Rui F. V.
dc.contributor.authorPragana, João
dc.contributor.authorBragança, Ivo
dc.contributor.authorSilva, Carlos
dc.contributor.authorMartins, Paulo
dc.date.accessioned2022-03-15T13:55:52Z
dc.date.available2022-03-15T13:55:52Z
dc.date.issued2022-06
dc.description.abstractThe 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.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationSAMPAIO, 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.pt_PT
dc.identifier.doi10.1177/10567895211072580pt_PT
dc.identifier.eissn1530-7921
dc.identifier.issn1056-7895
dc.identifier.urihttp://hdl.handle.net/10400.21/14472
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherSage Publications Ltd.pt_PT
dc.relationUIDB/50022/2020 - LAETApt_PT
dc.relationUIDB/50022/2020 - IDMECpt_PT
dc.relation.publisherversionhttps://journals.sagepub.com/doi/pdf/10.1177/10567895211072580pt_PT
dc.subjectBulk formingpt_PT
dc.subjectFormability testspt_PT
dc.subjectBiaxial tensionpt_PT
dc.subjectDuctile fracturept_PT
dc.subjectExperimentationpt_PT
dc.subjectFinite element modellingpt_PT
dc.titleRevisiting the fracture forming limits of bulk forming under biaxial tensionpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage900pt_PT
oaire.citation.issue6
oaire.citation.startPage882pt_PT
oaire.citation.titleInternational Journal of Damage Mechanicspt_PT
oaire.citation.volume31
person.familyNameSampaio
person.familyNameda Fonseca Matos Pragana
person.familyNameBragança
person.familyNameSilva
person.familyNameMartins
person.givenNameRui F.V.
person.givenNameJoão Pedro
person.givenNameIvo
person.givenNameCarlos
person.givenNamePaulo
person.identifier2967554
person.identifier465039
person.identifier.ciencia-id1D1B-AAD5-5282
person.identifier.ciencia-id5C1E-6DBE-E60D
person.identifier.ciencia-idAD1C-FCD3-0E95
person.identifier.ciencia-idC01F-D665-9513
person.identifier.orcid0000-0002-4067-0389
person.identifier.orcid0000-0002-3599-7053
person.identifier.orcid0000-0001-5409-619X
person.identifier.orcid0000-0003-3837-5185
person.identifier.orcid0000-0002-2630-4593
person.identifier.ridM-6219-2013
person.identifier.scopus-author-id57222276656
person.identifier.scopus-author-id55671241900
person.identifier.scopus-author-id55932125100
person.identifier.scopus-author-id7006083921
rcaap.rightsclosedAccesspt_PT
rcaap.typearticlept_PT
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