C_(f)/SiC复合材料铣削特性的三维有限元分析及试验验证  

Milling Performance of C_(f)/SiC Composites:Three-Dimensional Finite Element Analysis and Experimental

作　　者：ELLAHI Zohaib 赵国龙[1] 年智文 MUHAMMAD Jamil 何宁[1] ELLAHI Zohaib;ZHAO Guolong;NIAN Zhiwen;MUHAMMAD Jamil;HE Ning(College of Mechanical and Electrical Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,P.R.China)

机构地区：[1]南京航空航天大学机电学院,南京210016

出　　处：《Transactions of Nanjing University of Aeronautics and Astronautics》2023年第3期253-263,共11页南京航空航天大学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.52075255)。

摘　　要：碳纤维增强碳化硅(C_(f)/SiC)复合材料具有高强度、耐磨损和各向异性等特点,导致材料加工非常困难。本文开展了聚晶金刚石(PCD)刀具铣削C_(f)/SiC复合材料的三维有限元仿真和试验,研究了复合材料的切削特性;研究了加工参数对切削力的影响,以及不同纤维切削角下的材料去除机理。通过用户自定义的子程序在ABAQUS/CAE软件中建立了有限元切削仿真模型,仿真分析了加工参数对切削力的影响,并开展了验证试验。结果表明,有限元仿真和试验得到的X和Y方向的切削力具有良好的一致性。随着切削速度的增加,切削力降低;随着每齿进给量的增加,切削力升高。当沿着纤维方向进行切削时,刀具刃口的应力最小;随着纤维切削角的增大,刃口应力升高。本文可为C_(f)/SiC复合材料切削特性研究提供指导。Carbon fiber reinforced silicon carbide(C_(f)/SiC)composite materials possess high strength,wear resistance,and anisotropy,thus their machining is very difficult and demands extra precautions.In this research,finite element analysis(FEA)simulations and experiments of the slot milling process have been carried out to analyze the cutting performance of C_(f)/SiC with a polycrystalline diamond(PCD)tool.Effects of machining parameters on cutting forces are studied and material removal mechanisms at different fiber cutting angles have been investigated.The finite element model has been generated in ABAQUS/CAE software and the machining is performed.by using user-defined material subroutine.Effects of machining parameters on cutting forces are calculated through FEA simulations and compared with experimental results to authenticate the finite element model.Cutting forces in x-axis and y-axis directions obtained from experiments and simulations have been analyzed and a good agreement is found between them.The resultant cutting forces decrease with the increase in cutting speed.However,with the increase of feed per tooth the resultant cutting forces increase.When the machining is performed along the fiber direction,stresses generated near the tool edge are minimum.The stresses rise with the increase of the fiber cutting angle.This research provides an efficient way to analyze the cutting performance of C_(f)/SiC composite materials.

关 键 词：三维有限元仿真 C_(f)/SiC复合材料 铣削加工 切削力 切削加工性 

分 类 号：TG51[金属学及工艺—金属切削加工及机床]