Dynamic fracture toughness of glassExperimentally determined dynamic crack propagation histories in wedge-loaded, modified tapered, and rectangular double cantilever beam specimens were used to drive a dynamic finite element code in its generation phase. The resultant dynamic fracture toughness versus crack velocity relation, during the initial crack acceleration phase of these dynamic fracture specimens, was erratic but followed the standard Gamma-shaped curves of brittle polymers and metals during subsequent crack propagation at terminal velocity and crack deceleration phases. The distinct initiation phase of dynamic crack propagation, which was not observed in dynamic fracture of brittle polymer and metal specimens, is attributed to the lower stored energy in the glass specimen.
Document ID
19840041745
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Kobayashi, A. S. (Washington Univ. Seattle, WA, United States)
Emery, A. F. (Washington Univ. Seattle, WA, United States)
Liaw, B. M. (Washington, University Seattle, WA, United States)