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| Simulation of Nonmassing Behavior of Polycrystalline Copper under Cyclic Strain Condition |
| Yuanyuan,DONG Jiwei,FENG Miaolin |
| Department of Engineering Mechanics, Shanghai Jiaotong University, Shanghai 200240, China) |
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Abstract A cyclic plastic model in which an additional term is conducted into the evolution of backstress in order to predict nonmassing behavior of material was employed. Based on radialreturn method and back Euler integration, new stress and backstress contributions were obtained, tangent stiffness matrix for global iteration was deduced as well. The model was implemented into the commercial finite element software ABAQUS by usersubroutine UMAT. Examples were approached for polycrystalline copper which is typical nonmassing material. The results show that the finite element simulation agrees well with the experimental data.
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Received: 03 January 2009
Published: 29 January 2010
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