Tensile Cyclic Strength and Macroscopic Failure Characteristics of C/C and the Metal Impregnated C/C

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Abstract

Tensile cyclic strength and macroscopic behavior of C/C and metal impregnated C/C composites such as Cu-C/C and Si-C/C were investigated experimentally. From the results of tensile-tensile cyclic loading tests, S-N curves of these materials were obtained and the fracture mechanism of these materials was discussed. The cyclic strength of metal impregnated C/C composites is about 80% of the ultimate tensile strength at N=10^6. Though strength degradation appears in low cycle region, the residual strength is increased in high cycle region.

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