A comparison study between scalar and multi-plane microcracking ceramic damage models
- Weapons and Materials Research Directorate, Army Research Laboratory, Aberdeen Proving Ground, Maryland 21005 (United States)
The Rajendran-Grove (RG) ceramic damage model is based on an elastic-plastic-cracking description. A crack density parameter {gamma}(=N{sub o}*a{sup 3}) describes the scalar damage. The number of flaws N{sub o}* is assumed to be constant and the crack size parameter 'a' evolves according to a strain energy release based evolution law. Crack orientation is not considered in this model. However, Espinosa's multi-plane (MP) microcracking model considers crack orientations in nine pre-selected directions and computes damage by summing up the crack density contribution from all nine directions. Both models account for crack opening and sliding. These two models have been implemented in the 1995 version of the EPIC code. We simulated plate impact experiments in which a thin alumina flyer plate impacted a thick alumina plate. The experimental data consisted of particle velocities recorded at the back face of the target plate. This paper compares the results from the EPIC code simulations using the RG and MP ceramic models.
- OSTI ID:
- 21185635
- Journal Information:
- AIP Conference Proceedings, Vol. 429, Issue 1; Conference: 10. American Physical Society topical conference on shock compression of condensed matter, Amherst, MA (United States), 27 Jul - 1 Aug 1997; Other Information: DOI: 10.1063/1.55527; (c) 1998 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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