OS0504 強度強化を施した高熱伝導VGCF/アルミニウム複合材料の変形特性解析(微視構造を有する材料の変形と破壊,オーガナイズドセッション)

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In this paper, the evaluation of the strength of the VGCF/Aluminum (Al) composites which have highly thermal conductivity is conducted. VGCF (Vapor Growth Carbon Fiber) is a kind of the carbon nanotube (CNT) and has highly thermal conductivity and strength. The composites are fabricated by spark plasma sintering (SPS). The stress-strain curves of the composites are obtained by pure tensile tests and show that the composites have brittle behavior. A numerical simulation based on the micromechanics is conducted to estimate nonlinear behavior in the elastic and plastic deformation of the stress-strain relations of the composites. Both Eshelby and Mori-Tanaka theories, Weibull function, and Ramberg-Osgood law are used for the numerical simulation. As a result, it is found that the stress-strain relations of the composites are well simulated by Mori-Tanaka theory, and that the numerical simulations shows the developments of the damage in the matrix with increase in the volume fraction of VGCF.
2009-07-24