Three Dimensional Internal Inclined Crack Growth Behavior due to Repeated Rolling Thermoelastic Contact

• Published in: Transactions of the Japan Society of Mechanical Engineers Series A Vol. 71; no. 701; pp. 108 - 115
• Main Authors: ISHIHARA, Sotomi, SHIMIZU, Masayoshi, GOSHIMA, Takahito, UCHIYAMA, Ryuji
• Format: Journal Article
• Language: Japanese
• Published: The Japan Society of Mechanical Engineers 2005
• Subjects: Contact Problem; Crack Propagation; Elasticity; Fatigue; Fracture Mechanics; Rolling Contact; Stress Intensity Factor; Thermal Stress
• ISSN: 0387-5008; 1884-8338
• DOI: 10.1299/kikaia.71.108

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.