Abstract
A bar impact test was developed to study the dynamic fracture responses of precracked ceramic bars, Al2O3 and 15/29-percent volume SiCw/Al2O3. Crack-opening displacement was measured with a laser-interferometric displacement gage and was used to determine the crack velocity and the dynamic stress-intensity factorK dynI . The crack velocity andK dynI increased with increasing impact velocity while the dynamic-initiation fracture toughness,K Id, did not vary consistently with increasing impact velocities.
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Deobald, L.R., Kobayashi, A.S. A bar impact tester for dynamic fracture testing of ceramics and ceramic composites. Experimental Mechanics 32, 109–116 (1992). https://doi.org/10.1007/BF02324721
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DOI: https://doi.org/10.1007/BF02324721