SiC_p/Al复合材料铣削残余应力的有限元分析

SiC_p/Al复合材料属于典型难加工材料,大量Si C颗粒离散分布其中,导致在铣削加工高体积分数SiC_p/Al复合材料时,加工表面容易出现应力分布不均现象,严重影响材料的稳定性。为了研究SiC_p/Al复合材料加工表面残余应力,通过ABAQUS有限元分析软件建立了SiC_p/Al复合材料三维铣削有限元模型,并分析了切削工艺参数对残余应力的影响。结果表明:切削速度对残余应力变化影响较小,每齿进给量对残余应力变化影响较大,所得结果与经验计算值吻合较好。

Finite Element Analysis of Residual Stress during Milling of SiCp/Al Composites

SiCp/Al composite is a kind of typical materials difficult to process and a large amount of SiC particles distributed discretely,which lead to the uneven stress distribution in the machined surface when milling high volume fraction SiCp/Al composites.Therefore,the stability of the material was degraded severely.In this paper,in order to study of the residual stress of SiCp/Al composites machined surface,three dimensional milling model of SiCp/Al composite was established by using ABAQUS finite element software,and the influence of cutting parameters on residual stress was investigated.The results show that the cutting speed has a little influence on the change of residual stress,while the feed rate of each tooth has a significant influence.The values obtained from the simulation are in good agreement with that from the empirical formula.