Critical appraisal of limiting strain rates for compression testing of ceramics in a split Hopkinson pressure bar

Journal Article · Sat Jan 01 00:00:00 EST 1994 · Journal of the American Ceramic Society

DOI:https://doi.org/10.1111/j.1151-2916.1994.tb06987.x· OSTI ID:142260

Ravichandran, G; Subhash, G ^[1]

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1. California Inst. of Tech., Pasadena, CA (United States). Graduate Aeronautical Labs.

The split Hopkinson pressure bar (SHPB) is being widely used to determine the dynamic compressive strength of ceramics and ceramic composites. However, extreme caution needs to be exercised while testing these high-strength ceramics at high strain rates. The highest strain rate at which ceramics can be tested using an SHPB without violating the underlying assumptions is found to be in the range of 2500-3000/s. It is also shown that at very high loading rates, dispersion in the transmitted pulse can lead to discrepancies in measuring the dynamic failure strength of ceramics.

• Sponsoring Organization: USDOE
• OSTI ID: 142260
• Journal Information: Journal of the American Ceramic Society, Vol. 77, Issue 1; Other Information: PBD: Jan 1994
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES
CERAMICS
COMPRESSION STRENGTH
MATERIALS TESTING
COMPOSITE MATERIALS
SPECIFICATIONS
FAILURES