Mechanics of fracture under high-rate stress loading
The fracture properties of brittle materials subjected to impulsive or high rate loading is considered. Fracture is viewed as a microstructural process through the activation, growth and coalescence of a system of interacting cracks. The loading rate dependence of fracture stress is explained in terms of inertia of isolated cracks. The number of cracks participating in the fracture process, and the number and size of fragments in the failed material are related to both the inherent flaw structure and the rate of energy application required to sustain the system of growing cracks. Differences in loading conditions leading to material failure can result in vastly different fragment size distributions. These differences are compared with physically based statistical laws and possible relations to the loading conditions are explored. Lastly, continuum modelling of dynamic fracture focused toward computational analyses of complex applied problems is covered.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (USA)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 5695008
- Report Number(s):
- SAND-83-1148C; CONF-830975-3; ON: DE83013770
- Resource Relation:
- Conference: International union of theoretical and applied mechanics conference on geomaterials: rocks, concretes, soils, Evanston, IL, USA, 11 Sep 1983
- Country of Publication:
- United States
- Language:
- English
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