Abstract
Ductile fracture behaviors were experimentally and analytically investigated with fracture tests in various loading conditions. Fracture limit curves, which are the relationships between stress triaxiality factor and equivalent plastic strain at the location of fracture initiation, were obtained in the wide range of stress triaxiality, including negative triaxiality range. It was found that the trend of fracture limit curves were different depending on triaxiality. In order to confirm the applicability of the limit curves to fracture assessment after large deformation, load reverse tests were carried out. As a result, it was found that fracture initiation point in load and displacement curve could be predicted using the limit curves obtained in this study as fracture law in FE-analysis.
