A phenomenological two-phase constitutive model for porous shape memory alloys

Handle URI:
http://hdl.handle.net/10754/562228
Title:
A phenomenological two-phase constitutive model for porous shape memory alloys
Authors:
El Sayed, Tamer S.; Gurses, Ercan; Siddiq, Amir Mohammed
Abstract:
We present a two-phase constitutive model for pseudoelastoplastic behavior of porous shape memory alloys (SMAs). The model consists of a dense SMA phase and a porous plasticity phase. The overall response of the porous SMA is obtained by a weighted average of responses of individual phases. Based on the chosen constitutive model parameters, the model incorporates the pseudoelastic and pseudoplastic behavior simultaneously (commonly reported for porous SMAs) as well as sequentially (i.e. dense SMAs; pseudoelastic deformation followed by the pseudoplastic deformation until failure). The presented model also incorporates failure due to the deviatoric (shear band formation) and volumetric (void growth and coalescence) plastic deformation. The model is calibrated by representative volume elements (RVEs) with different sizes of spherical voids that are solved by unit cell finite element calculations. The overall response of the model is tested against experimental results from literature. Finally, application of the presented constitutive model has been presented by performing finite element simulations of the deformation and failure in unaixial dog-bone shaped specimen and compact tension (CT) test specimen. Results show a good agreement with the experimental data reported in the literature. © 2012 Elsevier B.V. All rights reserved.
KAUST Department:
Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division; Physical Sciences and Engineering (PSE) Division
Publisher:
Elsevier BV
Journal:
Computational Materials Science
Issue Date:
Jul-2012
DOI:
10.1016/j.commatsci.2012.02.031
Type:
Article
ISSN:
09270256
Sponsors:
This work was funded by the KAUST GCR Academic Excellence Alliance program.
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.authorEl Sayed, Tamer S.en
dc.contributor.authorGurses, Ercanen
dc.contributor.authorSiddiq, Amir Mohammeden
dc.date.accessioned2015-08-03T09:57:12Zen
dc.date.available2015-08-03T09:57:12Zen
dc.date.issued2012-07en
dc.identifier.issn09270256en
dc.identifier.doi10.1016/j.commatsci.2012.02.031en
dc.identifier.urihttp://hdl.handle.net/10754/562228en
dc.description.abstractWe present a two-phase constitutive model for pseudoelastoplastic behavior of porous shape memory alloys (SMAs). The model consists of a dense SMA phase and a porous plasticity phase. The overall response of the porous SMA is obtained by a weighted average of responses of individual phases. Based on the chosen constitutive model parameters, the model incorporates the pseudoelastic and pseudoplastic behavior simultaneously (commonly reported for porous SMAs) as well as sequentially (i.e. dense SMAs; pseudoelastic deformation followed by the pseudoplastic deformation until failure). The presented model also incorporates failure due to the deviatoric (shear band formation) and volumetric (void growth and coalescence) plastic deformation. The model is calibrated by representative volume elements (RVEs) with different sizes of spherical voids that are solved by unit cell finite element calculations. The overall response of the model is tested against experimental results from literature. Finally, application of the presented constitutive model has been presented by performing finite element simulations of the deformation and failure in unaixial dog-bone shaped specimen and compact tension (CT) test specimen. Results show a good agreement with the experimental data reported in the literature. © 2012 Elsevier B.V. All rights reserved.en
dc.description.sponsorshipThis work was funded by the KAUST GCR Academic Excellence Alliance program.en
dc.publisherElsevier BVen
dc.subjectConstitutive modelen
dc.subjectPorous plasticityen
dc.subjectPorous shape memory alloysen
dc.subjectUnit cell calculationsen
dc.titleA phenomenological two-phase constitutive model for porous shape memory alloysen
dc.typeArticleen
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Divisionen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalComputational Materials Scienceen
dc.contributor.institutionDepartment of Design, Manufacture and Engineering Management, University of Strathclyde, United Kingdomen
kaust.authorGurses, Ercanen
kaust.authorEl Sayed, Tamer S.en
kaust.authorSiddiq, Amir Mohammeden
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