Abstract
In order to reproduce the local deformation of automotive body structures during crash with high accuracy, the use of Isogeometric analysis is an efficient approach. In this paper, crack propagation analyses of high-strength steel were performed using the Isogeometric BEXT solid element composed of third-order basis function and fracture thresholds at high stress triaxiality obtained by small round bar tensile experiment. The results of the BEXT solid element showed the high correlation for crack propagation with the experiment and behavior after fracture initiation.
