Abstract
Extensive evaluations have been conducted to determine the effect of material and processing variables on the shear strength of carbon/carbon composites. Characteristically, the interlaminar shear strength of these materials is relatively lower than the other mechanical properties, such as cross ply shear, tensile, compression, flexure, and bearing strength. Shear strength data were obtained for various carbonaceous matrices and processing histories. These data are evaluated in relation to effects on both highand low-modulus graphite fabric reinforced systems. Results indicate that chemical vapor deposition (CVD) and/or combinations of CVD and resin/pitch matrix presursors are methods for achieving higher interlaminar shear strength in carbon/carbon composites, and unidirectional fabrics are best for high cross ply shear strengths.
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