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Structural Engineering and Mechanics Volume 87, Number 6, September25 2023 , pages 601-614 DOI: https://doi.org/10.12989/sem.2023.87.6.601 |
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Ratcheting assessment of austenitic steel samples at room and elevated temperatures through use of Ahmadzadeh-Varvani Hardening rule |
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Xiaohui Chen, Lang Lang and Hongru Liu
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| Abstract | ||
| In this study, the uniaxial ratcheting effect of Z2CND18.12N austenitic stainless steel at room and elevated temperatures is firstly simulated based on the Ahmadzadeh-Varvani hardening rule (A-V model), which is embedded into the finite element software ABAQUS by writing the user material subroutine UMAT. The results show that the predicted results of A-V model are lower than the experimental data, and the A-V model is difficult to control ratcheting strain rate. In order to improve the predictive ability of the A-V model, the parameter y2 of the A-V model is modified using the isotropic hardening criterion, and the extended A-V model is proposed. Comparing the predicted results of the above two models with the experimental data, it is shown that the prediction results of the extended A-V model are in good agreement with the experimental data. | ||
| Key Words | ||
| austenitic stainless steel; constitutive model; cyclic plasticity theory; finite element analysis; ratcheting behavior | ||
| Address | ||
| Xiaohui Chen, Lang Lang and Hongru Liu: School of Control Engineering, Northeastern University at Qinhuangdao, Qinhuangdao 066004, China | ||