基于欧拉/拉格朗日耦合算法,采用四棱锥模拟磨粒的切刃,进行了单颗磨粒的三维切削仿真。该方法解决了传统有限元法进行切削仿真时易于发生单元畸变的问题。仿真结果表明,磨粒的挤压使工件材料向前方及两侧流动而产生隆起,侧向隆起高度及范围逐渐增大,形成切屑后基本保持不变;磨粒切削刃处的工件材料变形剧烈,产生较大的加工应力,在沟槽侧面及底面留下较大的残余应力并产生较高的温度;磨粒刃尖处的接触应力最大,并沿着棱边向上迅速降低。 Based on the Euler / Lagrange coupling algorithm, the cutting edge of the pyramidal diamond was simulated and the three-dimensional cutting simulation of single abrasive grain was carried out. The method solves the problem that the traditional finite element method is prone to unit distortion when performing cutting simulation. The simulation results show that the extrusion of the abrasive particles causes the workpiece material to flow forward and on both sides to produce a bulge. The height and range of the lateral bulge gradually increase, and the chip remains basically unchanged after the chip is formed. The workpiece material at the abrasive cutting edge sharply deforms , Resulting in greater machining stress, leaving larger residual stress on the side and bottom of the trench and generating higher temperatures; the contact stress at the tip of the abrasive grain is maximized and decreases rapidly up the edge.