Appraisal of nonlinear plasticity models for filled rubber using benchmark tests

HR Ahmadi; AH Muhr; T Dalrymple; S Govindarajan

Appraisal of nonlinear plasticity models for filled rubber using benchmark tests

HR Ahmadi^*, AH Muhr, T Dalrymple, S Govindarajan

^*Corresponding author for this work

School of Nursing and Midwifery

Research output: Chapter in Book/Report/Conference proceeding › Conference proceedings published in a book › peer-review

Abstract

The paper describes the desired hardening rule for a proposed viscoplastic model for filled rubber. The suitability of plasticity models currently available in a commercial FE code for this purpose is then examined. It is concluded that a recently implemented Multilinear Kinematic Hardening Plasticity (MKHP) material model is capable of providing the desired Masing rule for filled rubber and is indistinguishable from a previously proposed overlay approach by Austrell, leading to a significant reduction in computation time. In addition, results are presented for the overlaid model where a newly offered finite strain plasticity model is used to calculate the response of hyperelastic-perfectly-plastic materials. The model uses multiplicative decomposition of deformation gradient and has been used to show that finite yield strains may also be used in the viscoplastic model with additive decomposition after all without significant problem.

Original language	English
Title of host publication	Constitutive Models For Rubber Vi
Editors	G Heinrich, M Kaliske, A Lion, S Reese
Pages	353-+
Number of pages	3
Publication status	Published - 1 Jan 2010

Cite this

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abstract = "The paper describes the desired hardening rule for a proposed viscoplastic model for filled rubber. The suitability of plasticity models currently available in a commercial FE code for this purpose is then examined. It is concluded that a recently implemented Multilinear Kinematic Hardening Plasticity (MKHP) material model is capable of providing the desired Masing rule for filled rubber and is indistinguishable from a previously proposed overlay approach by Austrell, leading to a significant reduction in computation time. In addition, results are presented for the overlaid model where a newly offered finite strain plasticity model is used to calculate the response of hyperelastic-perfectly-plastic materials. The model uses multiplicative decomposition of deformation gradient and has been used to show that finite yield strains may also be used in the viscoplastic model with additive decomposition after all without significant problem.",

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AB - The paper describes the desired hardening rule for a proposed viscoplastic model for filled rubber. The suitability of plasticity models currently available in a commercial FE code for this purpose is then examined. It is concluded that a recently implemented Multilinear Kinematic Hardening Plasticity (MKHP) material model is capable of providing the desired Masing rule for filled rubber and is indistinguishable from a previously proposed overlay approach by Austrell, leading to a significant reduction in computation time. In addition, results are presented for the overlaid model where a newly offered finite strain plasticity model is used to calculate the response of hyperelastic-perfectly-plastic materials. The model uses multiplicative decomposition of deformation gradient and has been used to show that finite yield strains may also be used in the viscoplastic model with additive decomposition after all without significant problem.

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Appraisal of nonlinear plasticity models for filled rubber using benchmark tests

Abstract

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