某高温重载自润滑关节轴承台架超载试验后，轴承内圈产生局部裂纹和断裂失效。采用宏观分析和微观分析等方法分析了轴承内圈出现裂纹和断裂的原因，并利用ANSYS有限元分析技术加以考察和验证。结果表明：该关节轴承出现裂纹和断裂是因为内外圈边缘和销钉槽部位未进行倒角处理，从而导致较大的应力集中；根据出现裂纹和断裂的原因以及ANSYS有限元分析结果，优化了该关节轴承的结构，减小了局部应力集中，有利于关节轴承台架试验的正常进行和轴承疲劳寿命的提高。

After bench overloading test of a high-temperature and heavy-load self-lubricating joint bearing, local cracking and fracture failure occurred at the bearing inner ring. The causes of the cracks and fractures at the bearing inner ring were analyzed by means of macro analysis and micro analysis, and were examined and verified by ANSYS finite element analysis technology. The results show that the cracks and fractures of the joint bearing were due to the fact that the edges of the inner and outer rings and the pin grooves were not chamfered, which resulted in a large stress concentration. Then the joint bearing was optimized based on the causes of cracks and fractures and the results of ANSYS finite element analysis to reduce the local stress concentration, which was conducive to the normal operation of the joint bearing bench test and the improvement of the bearing fatigue life.