Alumina strength degradation in the elastic regime
- Sandia National Laboratories, Albuquerque, New Mexico 87185 (United States)
Measurements of Kanel {ital et al.} [1991] have suggested that deviatoric stresses in glasses shocked to nearly the Hugoniot Elastic Limit (HEL) relax over a time span of microseconds after initial loading. {open_quotes}Failure{close_quotes} (damage) waves have been inferred on the basis of these measurements using time-resolved manganin normal and transverse stress gauges. Additional experiments on glass by other researchers, using time-resolved gauges, high-speed photography and spall strength determinations have also lead to the same conclusions. In the present study we have conducted transmitted-wave experiments on high-quality Coors AD995 alumina shocked to roughly 5 and 7 GPa (just below or at the HEL). The material is subsequently reshocked to just above its elastic limit. Results of these experiments do show some evidence of strength degradation in the elastic regime. {copyright} {ital 1998 American Institute of Physics.}
- Research Organization:
- Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC04-94AL85000
- OSTI ID:
- 295475
- Report Number(s):
- CONF-970707-; ISSN 0094-243X; TRN: 9902M0036
- Journal Information:
- AIP Conference Proceedings, Vol. 429, Issue 1; Conference: Meeting of the topical group on shock compression of condensed matter of the American Physical Society, Amherst, MA (United States), 27 Jul - 1 Aug 1997; Other Information: PBD: Jul 1998
- Country of Publication:
- United States
- Language:
- English
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