摘要
采用分子动力学方法模拟了金刚石磨粒对单晶铜工件的纳米磨削过程。基于模拟结果分析了工件在磨削过程中应力及温度的变化,并据此建立了纳米磨削工作模型,研究了纳米磨削过程中磨屑的形成机理。模拟结果发现,磨粒在较大的压力作用下,磨削后工件表层有一定深度的形变产生,并存在{1 1 1}晶面滑移形变。
A study of chip formation of nano-grinding process using molecular dynamics method was presented. Based on the MD simulation results, the nano-grinding processes were analysed using the equivalent stress distribution, temperature field and neighboring changing ratio distribution. Then a chip formation model of nano-grinding was presented, and the chip formation mechanism of nano grinding was proposed. Moreover,it is found that { 1 1 1} slip deformation occurres under the work piece subsurface while large pressure is applied on the grit.
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2011年第2期127-132,共6页
China Mechanical Engineering
基金
国家高技术研究发展计划(863计划)资助项目(2007AA04Z1B1)
重庆市科技攻关重点项目(CSTC2008AB3014)
关键词
磨屑形成
纳米磨削
分子动力学方法
等效应力
chip formation
nano- grinding
molecular dynamics （MD） method
virial stress
