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Abstract:
Based on experimental observation and theoretical analysis this
paper suggests that there are three important characteristics in the
initiation process of subsurface crack during rolling contact: (1) the
randomness of initiation angle; (2) the mechanical factors of the
initiation and propagation are independent of each other and can be
separated; (3) the statistical characteristic of initiation depth. The
depth where the subsurface crack initiated accords statistically with
the depth of maximum alternating shear stress. A dislocation releasing
model is proposed to explain the phenomenon observed during the test.
Key words:
滚动接触 接触疲劳 裂纹萌生
Received
198907, received in revised form 199001
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