DEFORMATION AND TEARING OF CLAMPED CIRCULAR WORK-HARDENING PLATES UNDER IMPULSIVE LOADING

An approximate theory is presented in this paper to predict the deform ation and tearing of clamped circular work-hardening plates subjected to uniformly distributed impulsive loads. Based on a power law stress- strain relationship throughout, various equations are obtained and an effective strain failure criterion is suggested for the rupture of the plates. It is shown that the theoretical predictions are in good agre ement with the experimental observations in terms of the maximum perma nent transverse displacements and the critical input impulses which ca use the tensile tearing failure of the plates under impulsive loading when material strain rate sensitivity is taken into account. It is als o shown that, to a first approximation, the theory developed for circu lar plates is applicable to rectangular plates. (C) 1998 Elsevier Scie nce Ltd. All rights reserved.