Title: COMBINED ISOTROPIC-KINEMATIC HARDENING LAWS WITH ANISOTROPIC BACK-STRESS EVOLUTION FOR ORTHOTROPIC FIBER-REINFORCED COMPOSITES
Page Range: p.225-233
Author(s): Lee M G; Chung K K; Youn J R; Kang T J
File size: 231K
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Journal: Polymers and Polymer Composites
Issue Year: ppc
Volume: 12
Issue No: No. 3
Abstract
In order to develop the theory of plasticity for orthotropic fibre-reinforced composites, a new combined isotropic-kinematic hardening law with the anisotropic back-stress evolution, was developed under the elasto-plasticity scheme. To account of the anisotropic yield function, Hill’s quadratic yield function was used. The stress update scheme based on the incremental deformation theory was also developed. Example solutions confirmed that the new constitutive equation well represented the Bauschinger and transient behaviours, as well as the directional dependence of the back-stress evolution for the highly anisotropic materials such as fibre-reinforced composites. 16 refs.
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