An endochronic plasticity formulation for filled rubber

作者：Netzker Christiane; Dal Huesnue; Kaliske Michael^*

来源：International Journal of Solids and Structures, 2010, 47(18-19): 2371-2379.

DOI：10.1016/j.ijsolstr.2010.04.026

• Endochronic plasticity
• Finite elastoplasticity
• Filled rubber
• FEM

The nature of elastomeric material demands the consideration of finite deformations, nonlinear elasticity including damage as well as rate-dependent and rate-independent dissipative properties. While many models accounting for these effects have been refined over time to do better justice to the real behavior of rubber-like materials, the realistic simulation of the elastoplastic characteristics for filled rubber remains challenging.
The classical elastic-ideal-plastic formulation exhibits a distinct yield-surface, whereas the elastoplastic material behavior of filled rubber components shows a yield-surface free plasticity. In order to describe this elastoplastic deformation of a material point adequately, a physically based endochronic plasticity model was developed and implemented into a Finite Element code. The formulation of the ground state elastic characteristics is based on Arruda and Boyce (1993) eight-chain model. The evolution of the constitutive equations for the nonlinear endochronic elastoplastic response are derived in analogy to the Bergstrom-Boyce finite viscoelasticity model discussed by Dal and Kaliske (2009).

• 出版日期2010-9