论文部分内容阅读
采用FEM与SPH耦合算法进行了金属切削加工仿真研究,模拟了切削过程中材料的本构行为.模拟结果表明,切削过程是切削层材料受到刀具的推挤后而产生的以剪切滑移为主的塑性变形过程;在切削过程中,切削力从零开始迅速增大,然后又减小,最后在一定范围内变动;稳定切削后,前刀面上的最大等效应力在距离切削刃一定距离处上下波动。与有限元仿真结果相比较,材料的变形情况与应力分布基本相符,验证了FEM与SPH耦合算法应用于金属切削仿真研究的可靠性。
The FEM and SPH coupling algorithm was used to simulate the metal cutting process simulation and simulate the constitutive behavior of the material during the cutting process.The simulation results show that the cutting process is the shear slippage generated when the cutting layer material is pushed by the tool The main plastic deformation process; in the cutting process, the cutting force rapidly increases from zero, and then reduce, and finally within a certain range of changes; stable cutting, rake face maximum equivalent stress at a certain distance from the cutting edge The distance fluctuated. Compared with the finite element simulation results, the deformation of the material is basically in accordance with the stress distribution, which verifies the reliability of FEM and SPH coupling algorithm applied to metal cutting simulation.