The Explosive Spherical Cavity Expansion for Characterization of SiC-N Ceramic Dynamic Behavior and Post Shock Damage Using RUS Method
- SRI International Menlo Park, CA 94025-3493 (United States)
- Mechanical and Aerospace Engineering Department, UCSD, La Jolla, CA 92093-0411 (United States)
- Materials Science and Engineering Program, UCSD, La Jolla, CA 92093-0418 (United States)
Two spherical cavity expansion experiments were performed with SiC-N to provide high-strain rate data for developing ceramic armor penetration models. Here, an explosive charge is detonated within a cavity machined in the ceramic, generating a pulse that moves radially outward. The particle velocity at multiple radial locations from the charge, including at the charge radii, was measured and the fractured ceramic was recovered for posttest evaluation. From the particle velocity histories we derived displacement, radial strain and circumferential strain histories. In the recovered samples we observed the regions where comminution, radial cracking and circumferential cracking occurred. The elastic properties of initial undamaged SiC-N and shocked damaged material were measured using a resonant ultrasound spectroscopy (RUS). Comparison of these measurements illustrated the posttest condition of the SiC-N material. Hot isostatic pressing of ''as is'' SiC-N material demonstrated a significant increase in the quality factor. The same procedure applied to SiC-N damaged in spherical cavity experiments resulted in a significant recovery of the elastic properties.
- OSTI ID:
- 20875744
- Journal Information:
- AIP Conference Proceedings, Vol. 845, Issue 1; Conference: American Physical Society Topical Group conference on shock compression of condensed matter, Baltimore, MD (United States), 31 Jul - 5 Aug 2005; Other Information: DOI: 10.1063/1.2263398; (c) 2006 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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Related Subjects
SUPERCONDUCTIVITY AND SUPERFLUIDITY
36 MATERIALS SCIENCE
CERAMICS
COMPARATIVE EVALUATIONS
CRACKING
DAMAGE
ELASTICITY
EXPLOSIVES
HOT PRESSING
NITRIDES
PRESSURE DEPENDENCE
PULSES
QUALITY FACTOR
SHOCK WAVES
SILICON CARBIDES
SPECTROSCOPY
SPHERICAL CONFIGURATION
STRAIN RATE
STRAINS
VELOCITY