王洋,王慧芹,李京鲁   

    摘要：本文对一起台架可靠性试验中的柴油机曲轴断裂故障,运用宏微观断口分析、金相组织检验、有限元计算等手段对断裂原因进行综合分析,结果表明:该曲轴断裂是典型的弯曲疲劳断裂,主要原因是制造过程问题,同时有必要增大凸台R角,进一步提高强度。

    关键词： 曲轴;断裂;故障分析;有限元分析

    Abstract: This paper analyzes the fracture failure of the diesel engine crankshaft during reliability test with the macro and micro-fracture analysis,metallographic inspection,and finite element analysis.The results show that the crankshaft fracture is typically caused by fatigue,which is involved in manufacturing,and that it is necessary to increase the R corner for strength improvement.

    Keywords: Crankshaft;Fracture;Failure Analysis;Finite Element Analysis

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