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Elastic-plastic endochronic constitutive model of 0Crl7Ni4Cu4Nb stainless steels

Guo, Jinquan and Wu, Lianping and Yang, Xiaoxiang and Zhong, Shuncong (2016) Elastic-plastic endochronic constitutive model of 0Crl7Ni4Cu4Nb stainless steels. Mathematical Problems in Engineering, 2016. ISSN 1024-123X (In Press)

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    Abstract

    We presented an elastic-plastic endochronic constitutive model of 0Crl7Ni4Cu4Nb stainless steel based on the plastic endochronic theory (which does not need the yield surface) and experimental stress-strain curves. The key feature of the model is that it can precisely describe the relation of stress and strain under various loading histories, including uniaxial tension, cyclic loading-unloading, cyclic asymmetric-stress axial tension and compression, and cyclic asymmetric-stress axial tension and compression. The effects of both mean stress and amplitude of stress on hysteresis loop based on the elastic-plastic endochronic constitutive model were investigated. Compared with the experimental and calculated results, it is demonstrated that there was a good agreement between the model and the experiments. Therefore, the elastic-plastic endochronic constitutive model provides a method for the accurate prediction of mechanical behaviors of 0Crl7Ni4Cu4Nb stainless steel subjected to various loadings.