Fatigue Crack Growth Behavior of Subsurface Crack in a Semi-Infinite Body Due to Rolling-Sliding Contact

Abstract

At first, we analyze the stress intensity factors at a crack tip of multiple kinked crack from a horizontal initial crack in a half-space due to rolling/sliding contact with frictional heat. On the basis of the results of stress intensity factors and applying the maximum energy release rate criterion to each kinks in order, the two-dimensional fatigue crack growth path are simulated, and making use of the fatigue crack growth law obtained from fatigue experimental results for a high carbon chromium bearing steel (AISI-52100), the propagation fatigue lives until the surface tribological failures are predicted due to the repetition of rolling-sliding contact. And we show that the increase of frictional coefficient, sliding/rolling ratio reduce the propagation fatigue lives, and the shortening of the depth of a horizontal initial subsurface crack reduce the propagation life and is apt to be easily induced the fatigue surface tribological failures.

A two-parameter analysis of surface fatigue crack growth behavior of fine-grained WC-Co cemented carbide at different stress ratios

“…In the above situation, short surface fatigue cracks initiate and grow on the mold, causing chipping and fracture of the mold. It is expected that the initiation and growth behavior of the short surface crack are concerned with wear behavior of the mold [1]. Currently, how to extend the mold life has been a big issue for manufacturing companies.…”