分子动力学仿真技术在超精密加工领域中的应用

The Application of Molecular Dynamics Simulation to Ultraprecision Machining

分子动力学仿真在超精密及微细加工中的作用已显示出良好的前景 ,较系统地描述了分子动力学中采用的势函数 ,仿真过程中的切屑形成、切削力、切削温度及表面质量 ,仿真算法与边界条件等内容 ;并结合实际分析了仿真图形的物理意义。最后指出了存在的问题和改进措施。

There isn't an efficient experiment and observation method for many physical phenomena occurred in microscale machining region,however molecular dynamics simulation technique plays an important role in this area.At present,molecular dynamics simulation for ultraprecision and micromachining process have shown very good application future.This paper systemetically discribes the potential energy function of molecular dynamics;chip formation,cutting force,cutting temperature and surface quality of cutting process;simulation algorithm and boundary condition;and analyzes physical significance of simulation figures through a practical example.At last,several problems and improving measures to develop the new technique are pointed out.