LARGE-DEFORMATION OF A THIN DISK BY A CYLINDRICAL PUNCH

By using the finite element code ABAQUS for large deformation, the beh avior of a thin disk clamped at the circumference and loaded at the ce nter by a rigid flat-end cylindrical punch was studied. The contact be tween the punch and the disk is assumed frictionless. The load/displac ement relation is compared with analytical results for a point load an d they seem to differ by a constant factor for large deformation. This factor depends on the size of the punch and the internal stress in th e disk. (C) 1997 Elsevier Science Ltd.