FLAW NUCLEATION AND ENERGETICS OF DYNAMIC FRAGMENTATION**This work performed at Sandia National Laboratories supported by the U.S. Department of Energy under contract number DE-AC04-76DP00789.

The relationship of flaw nucleation and growth to energy dissipation is considered. One dimensional models of explicit fracture processes have been constructed. Numerical methods are evaluated and used to model the interaction and potential arrest of growing flaws.