A prototypical model of a dislocation source capable of generating shear band structures in crystalline solids during shock or impact

摘要

The response of crystalline solids to high rate loading by shock or impact is often determined by the formation of shear band structures and the subsequent response of these localized structures to the applied stress. The discrete nature of these shear bands suggests that a single source, or at most a very few dislocation sources, may be responsible for creating the dislocations that form the shear bands. Here this is postulated to be the case, and a simple prototypical oscillator type source is established. The maximum dislocation generation rate of the source is shown to be of the order of 1011dislocations per second for high shear stress loads.