Constitutive modeling of rate dependence and microinertia effects in porous-plastic materials with multi-sized voids (MSVs)

Handle URI:
http://hdl.handle.net/10754/594169
Title:
Constitutive modeling of rate dependence and microinertia effects in porous-plastic materials with multi-sized voids (MSVs)
Authors:
Liu, Jinxing; El Sayed, Tamer S.
Abstract:
Micro-voids of varying sizes exist in most metals and alloys. Both experiments and numerical studies have demonstrated the critical influence of initial void sizes on void growth. The classical Gurson-Tvergaard-Needleman model summarizes the influence of voids with a single parameter, namely the void-volume fraction, excluding any possible effects of the void-size distribution. We extend our newly proposed model including the multi-sized void (MSV) effect and the void-interaction effect for the capability of working for both moderate and high loading rate cases, where either rate dependence or microinertia becomes considerable or even dominant. Parametric studies show that the MSV-related competitive mechanism among void growth leads to the dependence of the void growth rate on void size, which directly influences the void's contribution to the total energy composition. We finally show that the stress-strain constitutive behavior is also affected by this MSV-related competitive mechanism. The stabilizing effect due to rate sensitivity and microinertia is emphasized. © 2013 IOP Publishing Ltd.
KAUST Department:
Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division; Physical Sciences and Engineering (PSE) Division
Citation:
Liu JX, El Sayed T (2012) Constitutive modeling of rate dependence and microinertia effects in porous-plastic materials with multi-sized voids (MSVs). Modelling Simul Mater Sci Eng 21: 015001. Available: http://dx.doi.org/10.1088/0965-0393/21/1/015001.
Publisher:
IOP Publishing
Journal:
Modelling and Simulation in Materials Science and Engineering
Issue Date:
27-Nov-2012
DOI:
10.1088/0965-0393/21/1/015001
Type:
Article
ISSN:
0965-0393; 1361-651X
Sponsors:
This work was fully funded by the KAUST baseline fund. The authors would like to thank the reviewers for their valuable corrections and suggestions. Our thanks are also given to Ms. Lauratu Osu for her careful proofreading.
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.authorLiu, Jinxingen
dc.contributor.authorEl Sayed, Tamer S.en
dc.date.accessioned2016-01-19T13:23:05Zen
dc.date.available2016-01-19T13:23:05Zen
dc.date.issued2012-11-27en
dc.identifier.citationLiu JX, El Sayed T (2012) Constitutive modeling of rate dependence and microinertia effects in porous-plastic materials with multi-sized voids (MSVs). Modelling Simul Mater Sci Eng 21: 015001. Available: http://dx.doi.org/10.1088/0965-0393/21/1/015001.en
dc.identifier.issn0965-0393en
dc.identifier.issn1361-651Xen
dc.identifier.doi10.1088/0965-0393/21/1/015001en
dc.identifier.urihttp://hdl.handle.net/10754/594169en
dc.description.abstractMicro-voids of varying sizes exist in most metals and alloys. Both experiments and numerical studies have demonstrated the critical influence of initial void sizes on void growth. The classical Gurson-Tvergaard-Needleman model summarizes the influence of voids with a single parameter, namely the void-volume fraction, excluding any possible effects of the void-size distribution. We extend our newly proposed model including the multi-sized void (MSV) effect and the void-interaction effect for the capability of working for both moderate and high loading rate cases, where either rate dependence or microinertia becomes considerable or even dominant. Parametric studies show that the MSV-related competitive mechanism among void growth leads to the dependence of the void growth rate on void size, which directly influences the void's contribution to the total energy composition. We finally show that the stress-strain constitutive behavior is also affected by this MSV-related competitive mechanism. The stabilizing effect due to rate sensitivity and microinertia is emphasized. © 2013 IOP Publishing Ltd.en
dc.description.sponsorshipThis work was fully funded by the KAUST baseline fund. The authors would like to thank the reviewers for their valuable corrections and suggestions. Our thanks are also given to Ms. Lauratu Osu for her careful proofreading.en
dc.publisherIOP Publishingen
dc.titleConstitutive modeling of rate dependence and microinertia effects in porous-plastic materials with multi-sized voids (MSVs)en
dc.typeArticleen
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Divisionen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalModelling and Simulation in Materials Science and Engineeringen
kaust.authorLiu, Jinxingen
kaust.authorEl Sayed, Tamer S.en
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