|About this Abstract
||NUMIFORM 2019: The 13th International Conference on Numerical Methods in Industrial Forming Processes
||S-01: Modeling of the Anisotropic Behavior in Plasticity
||Accurate Modeling of Experimental Strain-hardening Characteristics for Series of High Strength Steel
||Changwei Lian, Jianping Lin, Weilong Hu, Chao Niu
|On-Site Speaker (Planned)
The constitutive equations like Swift and Hockett-Sherby are widely used for steels, but the deviation between experimental data and predicted results cannot be always accepted due to the different hardening and plastic deformation characteristics of various materials. It is necessary to develop a more appropriate model with better fitting accuracy, especial for high strength steels with non-constant strain-hardening exponents. To verify the predictive capability and accuracy of a new proposed model, hardening curves obtained through uniaxial tensile and hydraulic bulge tests were fitted. The results show that the predictive accuracy of the new model is much better than other models. The constitutive relationship between stress and strain obtained by the new model can further improve the accuracy of the numerical simulation of forming processes on the basis of the conventional tensile testing results.