Effects of crack orientations on crack stress intensity factors in a bearing

doi:10.7523/j.issn.2095-6134.2018.06.005

Abstract

Abstract: Effects of crack orientations on stress intensity factors were studied using the finite element analysis method. We considered the angle between the crack orientation and inner ring axial direction and the angle between the crack orientation and inner ring radius direction. The results indicate that when the angle between the crack orientation and inner ring axial direction is about 10°, the crack propagation rate reaches a maximum and the equivalent stress intensity factor is 0.22MPa·m^0.5. The crack propagation rate reaches a minimum and the equivalent stress intensity factor is 0.039MPa·m^0.5 when the angle between the crack orientation and inner ring axial direction is about 90°. When the angle between the crack orientation and inner ring radius direction is about 10°, the crack propagation rate reaches another maximum and the equivalent stress intensity factor is 0.19MPa·m^0.5. When the angle between the crack orientation and inner ring radius direction is about 80° or -80°, the crack propagation rate reaches another minimum and the equivalent stress intensity factor is about 0.15MPa·m^0.5. These results indicate that the crack orientation influences the crack propagation rate significantly.

Key words: bearing, crack orientation, crack propagation rate, stress intensity factor, finite element

CLC Number:

O346.1

LIU Long, SHI Junbo, DING Ning, WU Lawrence Chiman. Effects of crack orientations on crack stress intensity factors in a bearing[J]. , 2018, 35(6): 743-748.

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