1420 SiC/Al_2O_3ハイブリッドMMC/Al鋳造合金接合部の強度評価(S18-4 積層材料・均質材料,S18 不規則性,不均一性構造・材料の数理モデルとその応用)

概要

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To contribute to a better understanding of the fracture mechanisms and stress distributions of an aluminum cast alloy locally reinforced by SiC particles and Al_2O_3 whiskers a symmetrical four-point bending test was precisely analyzed experimentally and numerically. The fracture mechanism and the fracture path has been investigated on the fracture surfaces. Crack initiation locations and fracture surface morphologies have also been investigated. The displacement fields around the Al/MMC interface edge were measured by means of high-sensitivity moire interferometry. The stress distribution of Al/MMC joint have been calculated based on an inclusion array model considering the microscopic inhomogenious effects. Both the experimental results and the finite element simulation results show that the critical location for fracture is a region in MMC side near the macroscopic interface.
2005-09-18