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| Finite element analysis for coupled creep elastoplastic damage response |
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| DOI：10.7511/jslx19951004 |
| KeyWord:creep,elastoplasticity,coupling/damage,anisotropic nonlinearity,consisterit algo- rithm, |
| Li Xikui |
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| Abstract: |
| This paper deals with the computational aspects of coupled creep elastoplastic damage response for anisotropic,and as a special case isotropic nonlinear materials .A three phase backward Euler integration algorithm for stress update is proposed.For anisotropic nonlinearmaterials a general direct stress return mapping algorithm,using Newton-Raphson iteration,is derived.The stress vector and scalar internal state variables quantifying the incrementalcreep,plasticity and damage are updated simultaneously.The consistent tangent matrix is al-so formulated for use in a global Newton iterative procedure,Numerical examples are givento illustrate the capability and performance of the proposed algorithm and formulations inmodellimg the coupled constitutive behaviour. |
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