Constitutive modeling of void-growth-based tensile ductile failures with stress triaxiality effects

Handle URI:
http://hdl.handle.net/10754/563011
Title:
Constitutive modeling of void-growth-based tensile ductile failures with stress triaxiality effects
Authors:
Mora Cordova, Angel; Liu, Jinxing; El Sayed, Tamer S.
Abstract:
In most metals and alloys, the evolution of voids has been generally recognized as the basic failure mechanism. Furthermore, stress triaxiality has been found to influence void growth dramatically. Besides strain intensity, it is understood to be the most important factor that controls the initiation of ductile fracture. We include sensitivity of stress triaxiality in a variational porous plasticity model, which was originally derived from hydrostatic expansion. Under loading conditions rather than hydrostatic deformation, we allow the critical pressure for voids to be exceeded so that the growth due to plasticity becomes dependent on the stress triaxiality. The limitations of the spherical void growth assumption are investigated. Our improved constitutive model is validated through good agreements with experimental data. Its capacity for reproducing realistic failure patterns is also indicated by a numerical simulation of a compact tensile (CT) test. © 2013 Elsevier Inc.
KAUST Department:
Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division; Physical Sciences and Engineering (PSE) Division
Publisher:
Elsevier BV
Journal:
Applied Mathematical Modelling
Issue Date:
Jul-2014
DOI:
10.1016/j.apm.2013.11.049
Type:
Article
ISSN:
0307904X
Sponsors:
This work was fully funded by the MUST baseline fund.
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorMora Cordova, Angelen
dc.contributor.authorLiu, Jinxingen
dc.contributor.authorEl Sayed, Tamer S.en
dc.date.accessioned2015-08-03T12:04:11Zen
dc.date.available2015-08-03T12:04:11Zen
dc.date.issued2014-07en
dc.identifier.issn0307904Xen
dc.identifier.doi10.1016/j.apm.2013.11.049en
dc.identifier.urihttp://hdl.handle.net/10754/563011en
dc.description.abstractIn most metals and alloys, the evolution of voids has been generally recognized as the basic failure mechanism. Furthermore, stress triaxiality has been found to influence void growth dramatically. Besides strain intensity, it is understood to be the most important factor that controls the initiation of ductile fracture. We include sensitivity of stress triaxiality in a variational porous plasticity model, which was originally derived from hydrostatic expansion. Under loading conditions rather than hydrostatic deformation, we allow the critical pressure for voids to be exceeded so that the growth due to plasticity becomes dependent on the stress triaxiality. The limitations of the spherical void growth assumption are investigated. Our improved constitutive model is validated through good agreements with experimental data. Its capacity for reproducing realistic failure patterns is also indicated by a numerical simulation of a compact tensile (CT) test. © 2013 Elsevier Inc.en
dc.description.sponsorshipThis work was fully funded by the MUST baseline fund.en
dc.publisherElsevier BVen
dc.subjectFracture strainen
dc.subjectStress triaxialityen
dc.subjectVariational constitutive modelen
dc.subjectVoid growth and coalescenceen
dc.titleConstitutive modeling of void-growth-based tensile ductile failures with stress triaxiality effectsen
dc.typeArticleen
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Divisionen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalApplied Mathematical Modellingen
kaust.authorLiu, Jinxingen
kaust.authorMora Cordova, Angelen
kaust.authorEl Sayed, Tamer S.en
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