罗良,杨晓京.单晶锗纳米切削温度场分布及各项异性对切削温度的影响研究[J].稀有金属材料与工程,2019,48(4):1130~1134.[Luo Liang,Yang Xiaojing.Nano-cutting temperature field distribution and the influence of anisotropy on cutting temperature of single crystal germanium[J].Rare Metal Materials and Engineering,2019,48(4):1130~1134.]
单晶锗纳米切削温度场分布及各项异性对切削温度的影响研究
投稿时间:2018-10-05  修订日期:2018-10-26
中文关键词:  单晶锗  各向异性  分子动力学  切削温度  切削力
基金项目:国家自然科学基金资助(项目号51765027,51365021)
中文摘要:
      为深入理解单晶锗纳米切削特性,提高纳米锗器件光学表面质量,首次采用三维分子动力学(MD)的方法研究了单晶锗纳米切削过程中工件原子的温度分布情况,研究了晶体的各向异性(100), (110), (111)晶面对切削温度的影响及切削温度对切削力的影响。结果表明,在切削过程中最高切削温度分布在切屑当中,达到了460K。刀具的后刀面与已加工表面之间的区域也有较高的温度,在400K以上。在三个不同的晶面中,(111)晶面的切削温度最高,其根本原因是由于不同晶面间的原子空间结构不同,(111)晶面的原子密度最大即为单晶锗的密排面,释放出的能量最多。切削温度对切削力也有影响,切削温度越高,工件中原子受到的切削力越小。
Nano-cutting temperature field distribution and the influence of anisotropy on cutting temperature of single crystal germanium
英文关键词:single crystal germanium  anisotropy  molecular dynamics  cutting temperature  cutting force
英文摘要:
      In order to understand the nano-cutting properties of single crystal germanium and improve the optical surface quality of nano-germanium devices, the three-dimensional molecular dynamics (MD) method was firstly applied to investigate the temperature distribution of the material atoms during the nano-cutting process of single crystal germanium. The anisotropy effect of Ge (100)、(110)、(111) on the cutting temperature and the influence of cutting temperature on cutting force were investigated. It was found that the highest cutting temperature during the cutting process was distributed among the chips, reaching 460K. there is also a high temperature region in the friction zone of the tool back face, the highest temperature is above 400K. Among the three different crystal planes, Ge (111) has the highest cutting temperature, because the atoms between different crystal faces have different spatial structures. Ge (111) has the highest atomic density, namely, Ge(111) is the densely packed surface of the single crystal germanium, which releases the most energy. What’s more, cutting temperature has also played an impact on the cutting force, As the cutting temperature increases, the cutting force of the material atoms will be reduced.
作者单位E-mail
罗良 昆明理工大学机电工程学院 258412398@qq.com 
杨晓京 昆明理工大学机电工程学院  
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