【摘要】 单晶铜作为反射镜和光学元件基底材料，对表面精度要求高，需超精密切削，但切削中亚表层会产生影响精度的缺陷。通过Lammps模拟纳米级单晶铜切削实验，研究加工中材料内部产生的位错类型及其演变机理。结果表明，切削中主要产生大量的刃型位错及变形。更多还原

【Abstract】 As the base material of reflectors and optical components, single crystal copper is with high requirements on surface accuracy and requires ultra-precision cutting, but during cutting, defects that affect the accuracy are found in the sub-surface. This paper carries out simulation of nano-cutting of the single crystal copper through Lammps, studies the type of dislocation generated in the material during cutting and investigates the relative evolution mechanism. The results show that during cutting, a large amount of edge dislocation and deformation are generated.更多还原