137 C/C複合材料の熱衝撃損傷挙動(OS 耐熱材料)

概要

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Carbon fiber reinforced carbon (C/C) composites are expected for various high temperature structural applications. In most of these applications, the materials are subjected to transient thermal conditions. Thus, it is important to understand the mechanism of thermal shock damage. In this paper, thermal shock behavior of the unidirectional and cross-ply C/C composites was studied experimentally and numerically. Experimental results showed that macroscopic failure did not occur in both C/C composites, but microscopic damage was observed near the surface. According to FEM analysis, stress relaxation occured in unidirectional C/C composites due to formation of the microscopic damage. On the other hand, microscopic damage induced by thermal residual stress during processing is expected as main reason for the high thermal shock resistance.
一般社団法人日本機械学会の論文
2001-11-02