基于ANSYS含裂纹曲轴应力强度因子的计算
Calculation of Stress Intensity Factor for Crankshaft with Crack by Finite Element Software ANSYS
韩厚祥, 干 洪, 何芝仙
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作者单位：(安徽工程大学 机械与汽车工程学院 先进数控和伺服驱动技术安徽省重点实验室, 安徽 芜湖 241000)
中文关键字：曲轴； 应力强度因子； 有限元法； 裂纹深度
英文关键字：crankshaft; stress intensity factor; finite element method; crack depth
中文摘要：采用ANSYS有限元软件，在内燃机曲轴——轴承系统动力学与摩擦学耦合分析的基础上，通过对曲轴动应力分析，确定了裂纹的启裂部位。运用有限元法计算了不同裂纹深度下的等效应力强度因子并得出其变化规律。计算结果表明，等效应力强度因子与发动机点火顺序密切相关，其峰值随裂纹深度的增加而增大。
英文摘要：The dynamic stress intensity factor of crankshaft in a diesel engine was analyzed by finite element analysis software ANSYS. The dynamic stress of the crankshaft was calculated based on multidisciplinary coupling analysis between dynamics and tribology on a crankshaft-bearing system in order to determine the position of the initial crack in crankshaft. The equivalent stress intensity factors KIeq of the crankshaft with various depth cracks were obtained by FEM software ANSYS. The numerical simulation results show that the equivalent stress intensity factors KIeq relates with the engine firing order, their peak value rises while the crack depth increases.