Study of the fracture limit evaluation method from the edge of steel sheet on the car crash (2nd report) - Edge fracture prediction by using CAE

摘要

The fracture of the steel sheet generated in the vehicle collisions has a large contribution to vehicles modification, and, as for it, consideration of the steel sheet fracture for the improvement in prediction accuracy by vehicle crash simulations is important for it. It examined by the hole attaching hat type test piece having bent static three points, and the fracture strain of holes was measured. The three points bent test was reproduced in FEE and relation between element size and a fracture strain value was clarified for the holes strain value as compared with the examination.