不同加载作用下砂轮片破裂失效的有限元分析

Finite Element Analysis on Fracture Failure of Grinding Wheel Blade Under Different Loading

针对实际磨削加工中砂轮片的破裂失效机理进行研究,通过ANSYS有限元分析软件对不同加载状态下的砂轮片进行应力分布分析,揭示失效的原因。建立砂轮片有限元模型,对砂轮模型分别施加离心力、磨削力、端面力,模拟砂轮片实际作业中的不同受力情况,分析和比较砂轮工作过程中不同受力状态下的应力、应变和位移变化。结果表明:对砂轮应力影响程度由大至小依次是离心力、端面力和磨削力;对砂轮应变影响程度由大至小依次则为端面力、离心力和磨削力;过大角速度带来的大离心力和端面磨削带来的端面力是造成砂轮破裂的主要因素。

To investigate the failure mechanism of the grinding wheel blade during the actual grinding process,the stress distribution of the grinding wheel blade under different loading conditions was analyzed using ANSYS finite element analysis software,and the failure reason was revealed.Firstly,the finite element model of grinding wheel blade is established.Then,centrifugal force,grinding force and end face force are applied to the grinding wheel model respectively to simulate the different stress conditions in actual operation.Finally,the changes of stress,strain and displacement under different stress states during the working process were analyzed and compared.The results show that the influence order on the stress of the grinding wheel is centrifugal force,end face force and grinding force respectively;the influence order on the strain of the grinding wheel is the end force,centrifugal force and grinding force respectively;the main factors causing the grinding wheel rupture are the large centrifugal force brought by excessive angular velocity and the end face force brought by end face grinding.