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Stress and strain-driven algorithmic formulations for finite strain viscoplasticity for hybrid and standard finite elements

Jog, CS and Bayadi, Ramaprakash (2009) Stress and strain-driven algorithmic formulations for finite strain viscoplasticity for hybrid and standard finite elements. In: International Journal For Numerical Methods In Engineering, 79 (7). pp. 773-816.

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Official URL: http://www3.interscience.wiley.com/journal/1222109...

Abstract

This work deals with the formulation and implementation of finite deformation viscoplasticity within the framework of stress-based hybrid finite element methods. Hybrid elements, which are based on a two-field variational formulation, are much less susceptible to locking than conventional displacement-based elements. The conventional return-mapping scheme cannot be used in the context of hybrid stress methods since the stress is known, and the strain and the internal plastic variables have to be recovered using this known stress field.We discuss the formulation and implementation of the consistent tangent tensor, and the return-mapping algorithm within the context of the hybrid method. We demonstrate the efficacy of the algorithm on a wide range of problems.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to John Wiley & Sons Ltd.
Keywords: finite deformation viscoplasticity; hybrid elements; viscoplasticity; large-deformation; hybrid
Department/Centre: Division of Mechanical Sciences > Mechanical Engineering
Date Deposited: 21 Dec 2009 10:42
Last Modified: 19 Sep 2010 05:44
URI: http://eprints.iisc.ernet.in/id/eprint/22950

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