摘要
微纳切削加工是硬脆材料最高效的精密/超精密加工方法,而模拟简化试验与计算机模拟能为错综复杂的切削加工过程提供重要研究手段,便于从宏微观跨尺度层面阐释硬脆材料切削加工机理。有限元、离散元与分子动力学等计算机模拟手段能可视化虚拟实际切削加工难以展示的应力应变、裂纹演化、材料去除等动态过程。微纳切削加工模拟研究证实了硬脆材料在特定临界条件下发生脆塑转变效应,为纳米尺度的塑性域超精密加工技术提供重要依据。然而,微纳切削模拟研究方法因受限于理想化模型与时空尺度差异等因素,还存在一些亟待优化解决的复杂难题。
Micro-nano machining is the most efficient precision/ultra precision machining method for the hard and brittle materials.Simplified simulation experiment and computer simulation can provide important research means for intricate cutting process,which is convenient to explain the machining mechanism of hard and brittle materials from macro and micro cross scale level.Computer simulation methods such as finite element,discrete element and molecular dynamics can visualize the dynamic processes such as stress-strain,crack evolution and material removal that are difficult to display in virtual machining.The simulation of micro-nano machining confirms the brittle plastic transition effect of the hard and brittle materials under certain critical conditions,which provides an important basis for ultra precision machining technology at nano-scale plastic domain.However,the research methods of micro-nano cutting simulation are limited by facrors such as idealized models and temporal and spatial scale differences,there are still some complex problems that need to be optimized.
作者
王龙
汪刘应
唐修检
袁晓静
王友才
油银峰
Wang Long;Wang Liuying;Tang Xiujian;Yuan Xiaojing;Wang Youcai;You Yinfeng(Combat Support College,Rocket Force University of Engineering,Xi'an 710000,China;National Defense Key Laboratory for Remanufacturing Technology,Academy of Army Armored Force,Beijing 100072,China;不详)
出处
《工具技术》
北大核心
2021年第7期33-38,共6页
Tool Engineering
基金
国家自然科学基金(51905542,51775555)
陕西省高校科协青年人才托举计划项目(20190411)
中国博士后科学基金资助项目(2019M663990)
火箭军工程大学青年基金资助项目(2019QN JJ08)。
关键词
硬脆材料
微纳加工
切削
模拟
hard brittle material
micro-nano machining
cutting
simulation
作者简介
第一作者:王龙,博士,讲师,火箭军工程大学作战保障学院,710000西安市;通信作者:唐修检,博士,副教授,陆军装甲兵学院装备再制造技术国防科技重点实验室,100072北京市
