基于LS-DYNA的单颗磨粒切削加工有限元分析

Finite Element Analysis of Single Grit Machining Based on LS-DYNA

通过分析珩齿加工的啮合特点、超声珩齿切削原理及运动特性,利用非线性有限元程序LS-DYNA,对齿轮表面的切削过程进行三维显式动态分析。模型采用单点积分Lagrange算法的三维显示实体单元Solid164,以Johnson-Cook本构模拟齿轮表面材料,以面—面侵蚀和自动接触定义接触表面,对切削机理进行研究分析,从而验证了切削速度对切屑形态有显著的影响。

Through analyzing the meshing characteristics,cutting principle and motion characteristics of gear honing,this paper analyzes the cutting process of gear surface by non-linear finite element code LS-DYNA.In the process of setting up the 3D finite element model of a grit and a gear surface,we use 8-node 3D solid element based on one-point integration Lagrange formula,adopt Johnson-Cook to simulate the gear surface material,and the contact surface is defined as surface to surface erosion and automatic contact.This study explains that cutting speed has a significant influence on chip form.