SiCp/Al复合材料切削仿真研究

文摘针对SiC_p/Al复合材料的难加工性,建立了二维有限元切削模型,利用ABAQUS完成复合材料正交切削的动态物理仿真。通过仿真与实验结果的比较,验证模型的准确性。同时,利用该切削模型分析颗粒分布形式、直径及刀尖圆弧半径对切削力的影响。结果表明,SiC颗粒的分布形式对切屑形态和切削力具有明显的影响,颗粒形成团簇不利于复合材料加工。切削力随颗粒直径的增大而减小,随刀尖圆弧半径的增大而增大。

Cutting Simulation of SiCp/Al Composite Materials

Based on the difficult machinability of Al/SiC_p composite materials, a two dimensional finite element cutting model was developed in this paper. By using ABAQUS, the dynamic simulation of the cutting model was performed. Comparison of the result of simulation and experiment, the accuracy of the cutting model was verified. And then, the distribution form of SiC particle, the diameter of particle and the edge radius of tool effect on the cutting force were analyzed based on the model. The results show that the distribution form of SiC affects the chip morphology and the cutting forces are obvious, and particle clusters is not helpful for composite materials machining. The cutting force decreases with the increase of particle diameter, while increases with edge radius of tool.