The dynamic instability of elastic-plastic plate duo to impact loading

摘要

Anomalous behaviors of structural dynamic response is an nonlinear behaviors. By ‘anomalous’ here is meant permanent deflection in the direction opposite to direction of the applied loading rather than in its direction. In this paper the full numerical investigations with the circle plate to short pulse loading have been presented with finite element scheme. The results indicate that With laoding increasing, the deflection of plate shows different response model. Anomalous is influenced by structural paramaters, constrains, loading, numerical analysis technique and the final response model of the plate exhibits sensitivities with respect to them small changes.