摩擦熱を伴う転がり接触による三次元内部傾斜き裂の進展挙動

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rights: 本文データは社団法人日本機械学会の許諾に基づきCiNiiから複製したものであるThis paper considered three dimensional internal inclined crack growth behaviors due to repeated rolling thermoelastic contact. In this analysis, crack is modeled as an internal inclined planar crack in a three dimensional half-space. Rolling contact is simulated as a long and narrow distributed load with both normal and shear components moving with constant velocity. At first, stress intensity factors along the crack contour are analyzed using high carbon chromium bearing steels. Next, numerical results of crack growth contours are given based on a modified Paris power low. And fatigue life is estimated by maximum crack growth. The shapes of crack contour and fatigue life are calculated under various conditions, which change sliding ratio, frictional coefficient, depth and angle of inclined crack. And influences of conditions, which affect the shapes and fatigue life, are considered from viewpoint of stress distributions in the state where there is no crack.
2005-01-25