Multi-scale applications to high strain-rate dynamic fracture

Though the bulk of the Bodega Bay Multi-Scale Modeling workshop was devoted to understanding flow stress within the multi-scale paradigm, a dedicated session was devoted to Dynamic Failure and Fracture. Here, we review recent developments with emphasis on work presented at the workshop in the area of ductile dynamic fracture. The paper begins with a discussion of the relevant experimental observations, followed by an overview of the mechanisms of void nucleation and growth at high strain-rate, including dislocation processes (see the companion review by Bulatov in this issue). While the connection to the continuum is at its infancy, we present some directions that hold promise. Shear localization from the continuum perspective is presented in the companion review by Becker et al. This section finishes with a brief summary of issues that need to be resolved to apply the full apparatus of multi-scale modeling to dynamic fracture. This revised version was published online in June 2006 with corrections to the Cover Date.