2208 転がりすべり接触による内部空孔からのき裂発生と応力拡大係数(S14-2 き裂と材料形状に関する取り組み,S14 先進材料の材料特性における弾性数理解析の新たな取り組み)

概要

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The stress intensity factors of a crack emanating from a void in a half space are analyzed under rolling/sliding contact with frictional heat. The complex variable formulation of Muskhelishivili is used to reduce the problem to the simultaneous integral equations. These integral equations are solved numerically thus enabling the numerical calculation of the stress intensity factors. On the basis of these results, the location and direction of initial crack growth emanating from a void are predicted numerically for the case of high carbon-chromium bearing steel. The initial crack growth direction is assumed to be determined by applying the maximum energy release rate criterion to oriented crack emanating from location of stress concentration at a void. The effects of frictional coefficient, slide/roll ratio and depth of void on the location and direction of initial crack growth are considered.
一般社団法人日本機械学会の論文
2007-09-07