强化研磨微纳加工残余应力的数值模拟分析

Numerical Simulation Analysis of Residual Stress in Strengthen Grinding Micro-nano Processing

为了探究强化研磨微纳加工中磨粒喷射速度和喷射角度对残余应力场分布的影响,采用ABAQUS有限元分析软件进行数值模拟,建立了表面覆盖为100%的单颗粒磨粒撞击GCr15轴承钢靶材的模型。利用单一控制变量的方法对比了不同速度和不同角度下仿真模拟靶材表面残余应力的大小以及残余应力层深。研究结果表明,强化研磨微纳加工可以在靶材引入0.09~0.143 mm的残余应力层,最大残余压应力和表面残余压应力值具有一定的正相关性,在喷射角度为5π/12和喷射速度在60 m/s的组合工艺参数下,可以获得最大残余应力。

In order to investigate the influence of abrasive particle spraying speed and spraying angle on the distribution of residual stress field in strengthen grinding micro-nano processing,numerical simulation was performed using ABAQUS finite element analysis software,and a model of single particle abrasive particles with a surface coverage of 100%hitting the target was established.The method of single control variable was used to compare the magnitude of the residual stress on the surface of the simulated target at different speeds and different angles,as well as the depth of the residual stress layer.The research results show that the strengthen grinding micro-nano processing can introduce a residual stress layer of 0.09~0.143 mm in the target.The maximum residual compressive stress and the surface residual compressive stress value have a certain positive correlation.Under the combined process parameters of the spray angle 5π/12 and the spray speed 60 m/s,the maximum residual stress can be obtained.