基于ANSYS的气缸疲劳寿命分析

摘要

This paper conducted a numerical simulation by using ANSYS to model a cylinder with an impact load function and obtained the stress distribution contours for the cylinder with the impact of piston rod.Based on the simulation model,the ANSYS software is adopted to analyze the fatigue life for the cylinder and obtain the fatigue using life.And then,a fatigue test of cylinder is carried out through a pneumatic test platform to get the failure sample and fatigue life of the cylinder.Through this test,the rationality of analyzing the cylinder with the finite element method and stress-life method to get the fatigue life is validated,which will provide a method and basis for the prediction of fatigue life for the cylinder.%利用ANSYS对气缸进行建模仿真,建立气缸的冲击载荷模型,得到气缸在活塞冲击作用下的应力分布云图.在此基础上,利用ANSYS软件对气缸的疲劳寿命进行分析,并得到其疲劳使用寿命.最后,通过气动试验平台对气缸进行疲劳试验,得到了气缸的失效样件和疲劳使用寿命,验证了采用有限元法和应力-寿命法对气缸进行疲劳寿命分析的合理性和正确性,为气缸的疲劳寿命预测提供了一种方法和依据.