Molecular dynamics simulations of thermal effects in nanometric cutting process  

作　　者：GUO YongBo,LIANG YingChun,CHEN MingJun,BAI QingShun&LU LiHua Precision Research Engineering Institute,Harbin Institute of Technology,Harbin 150001,China 

出　　处：《Science China(Technological Sciences)》2010年第3期870-874,共5页中国科学（技术科学英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.50675050);the Outstanding Youth Fund of Heilongjiang Province(Grant No.JC200614)

摘　　要：Understanding the basic action of how material removing in nanoscale is a critical issue of producing well-formed components.In order to clarify thermal effects on material removal at atomic level,molecular dynamics(MD)simulations of nanometric cutting of mono-crystalline copper are performed with Morse,EAM and Tersoff potential.The effects of cutting speed on temperature distribution are investigated.The simulation results demonstrate that the temperature distribution shows a roughly concentric shape around shear zone and a steep temperature gradient lies in diamond tool,a relative high temperature is located in shear zone and machined surface,but the highest temperature is found in chip.At a high cutting speed mode,the atoms in shear zone with high temperature implies a large stress is built up in a local region.Understanding the basic action of how material removing in nanoscale is a critical issue of producing well-formed components.In order to clarify thermal effects on material removal at atomic level,molecular dynamics(MD)simulations of nanometric cutting of mono-crystalline copper are performed with Morse,EAM and Tersoff potential.The effects of cutting speed on temperature distribution are investigated.The simulation results demonstrate that the temperature distribution shows a roughly concentric shape around shear zone and a steep temperature gradient lies in diamond tool,a relative high temperature is located in shear zone and machined surface,but the highest temperature is found in chip.At a high cutting speed mode,the atoms in shear zone with high temperature implies a large stress is built up in a local region.

关 键 词：MOLECULAR DYNAMICS nanometric CUTTING TEMPERATURE DISTRIBUTION 

分 类 号：TB383.1[一般工业技术—材料科学与工程]