基于ANSYS/LS-DYNA的金属切削过程有限元模拟

利用ANSYS/LS-DYNA进行了金属切削过程的模拟研究,模拟了切屑的形成过程,得到了变形区应力和应变分布,并研究了残余应力和切削力的变化。模拟结果表明,在第1变形区和第2变形区,应力、应变较大,且较集中,前刀面的最大应变出现在距刀尖一定距离的地方;在切削过程中,切削力逐渐增大,最后保持在某一个值附近波动,达到稳定状态;在加工表面上存在着残余应力和残余应变,且残余应力和残余应变随着与刀尖和已加工表面之间距离的增大而减小。

Finite Element Simulation of the Process of Orthogonal Metal Cutting Based on the ANSYS/LS- DYNA

The finite element simulation study of metal cutting process has been carried out with the finite element software ANSYS/LS -DYNA. The forming process of chip was simulated and the distribution of strain and stress was acquired. In addition, the change of remnants stress, strain and cutting force has been studied. The results of simulation showed that the strain and stress is larger and more intense in the first and second deformation zone and the largest stress of rake face appeared in position that had a displacement to the tool tip. In the process of metal cutting, the cutting force has been increased gradually and then held wave nearby a constant value. There were remnants strain and stress in the finished surface and the remnants strain and stress decreased with the distance of tool tip and the finished surface increased.