Dynamic–Viscoplastic Experiments and Analyses of Rapid Crack Propagation and Arrest

摘要: ABSTRACT There are many practical situations in which the initiation of rapid crack propagation cannot be absolutely precluded and where consequences a large scale fracture would catastrophic. For these cases arrest mechanics technology is needed. The currently available procedures utilize elastodynamic analyses material property characterization. However, as small-scale yielding conditions not always satisfied, more advanced viscoplastic-dynamic now being developed to generalize technology. approach that has been taken SwRI work intimately couple analysis capability with exceptionally-well instrumented experiments. This level complexity deemed essential ensure transferability toughness values obtained from small size test specimens an engineering structure when inertia forces, reflected stress waves, large-scale rate-dependence must accounted for. Following pragmatic introduction subject, this paper outlines current suggests areas further research