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

被引:2
作者
Jog, C. S. [1 ]
Bayadi, Ramaprakash [1 ]
机构
[1] Indian Inst Sci, Dept Mech Engn, Bangalore 560012, Karnataka, India
关键词
finite deformation viscoplasticity; hybrid elements; viscoplasticity; large-deformation; hybrid; RATE-INDEPENDENT ELASTOPLASTICITY; CONSISTENT TANGENT OPERATORS; MAXIMUM PLASTIC DISSIPATION; MULTIPLICATIVE DECOMPOSITION; CONSTITUTIVE-EQUATIONS; DEFORMATION; MODEL; FRAMEWORK; SOLIDS;
D O I
10.1002/nme.2570
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
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. Copyright (C) 2009 John Wiley & Sons, Ltd.
引用
收藏
页码:773 / 816
页数:44
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