Steel and Composite Structures

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Constitutive model coupled with damage for carbon manganese steel in low cycle fatigue

  • Received : 2014.02.03
  • Accepted : 2014.07.01
  • Published : 2014.08.25
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Abstract

Carbon-manganese steel A42 (French standards) is used in steam generator pipes of nuclear center and subject to low cycle fatigue (LCF) loads. In order to obtain the material LCF behavior, the tests are implemented in a hydraulic fatigue machine. The LCF plastic deformation and cyclic stress in macroscope have been influenced by the accumulated low cycle fatigue damage. The constitutive kinematic and isotropic hardening modeling is modified with coupling fatigue damage to describe the fatigue behavior. The improved model seems to be good agreement with the test results.

Keywords

Acknowledgement

Supported by : Natural Science Foundation of China

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