The effect of plastic anisotropy on the calibration of an equivalent model for clinched connections

Abstract

Abstract To increase the accuracy of an equivalent clinch joint model, the effect of plastic anisotropy and residual material state is investigated by using three different yield functions (von Mises, Hill's 48 and Yld2000-2d). The results show that the residual stress state affects the calibration accuracy of the elastic and plastic parameters of the equivalent model in the normal direction of the joint. Moreover, it is shown that the adopted yield function significantly affects the calibration of the plastic model parameters. For the shear direction of the joint, however, the choice of the yield function does not affect the calibration accuracy.