摘要
为解决SiCp/Al复合材料切削力准确预测的问题,本文采用理论建模、有限元模拟和实验研究相结合的方法,研究了SiCp/Al复合材料切削过程中刀-屑接触摩擦状态。考虑基体材料与刀具接触摩擦、Si C颗粒的两体滑动摩擦和Si C颗粒的三体滚动摩擦对SiCp/Al复合材料刀-屑接触状态的影响,提出了SiCp/Al复合材料刀-屑接触三相摩擦系数模型。建立了SiCp/Al复合材料多颗粒随机分布模型,并基于刀-屑接触三相摩擦系数模型进行了SiCp/Al复合材料切削有限元模拟以及实验研究。结果表明:采用基于刀-屑接触三相摩擦系数模型进行SiCp/Al复合材料切削过程模拟,能够较准确地预测SiCp/Al复合材料的去除过程、切屑形成、刀具与颗粒之间的相互作用以及切削力。
To solve the problem of accurate prediction of cutting force for SiCp/Al Composites,in this study,the tool-chip contact friction state in the cutting process of SiCp/Al composites was studied by combining theoretical modeling,finite element simulation and cutting experiment.Considering the influence of the wear resistances of aluminum matrix as well as two-and three-body rolling of the SiC particles on the tool-chip friction coefficient,a threephase friction coefficient model of tool-chip contact in SiCp/Al composites was proposed.Further,a multi-particle random distribution model of SiCp/Al composites was established.The finite element simulation and experimental study of cutting SiCp/Al composite were conducted based on the model of three-phase friction coefficient of toolchip contact.Results reveal that the simulation of cutting process can accurately predict the material removal process,chip formation,interaction between cutting tools and particles,and cutting force of SiCp/Al composites.
作者
段春争
孙伟
傅程
张方圆
DUAN Chunzheng;SUN Wei;FU Cheng;ZHANG Fangyuan(School of Mechanical Engineering,Dalian University of Technology,Dalian 116024,China)
出处
《哈尔滨工程大学学报》
EI
CAS
CSCD
北大核心
2019年第3期509-517,共9页
Journal of Harbin Engineering University
基金
国家自然科学基金项目(51775083)
关键词
SICP/AL复合材料
刀-屑界面摩擦
摩擦系数
有限元模拟
摩擦力
切屑形成
切削力
本构关系
SiCp/Al composites
tool-chip interface friction
friction coefficient
finite element simulation
friction force
chip formation
cutting force
constitutive relation
