摘要
由于SiCp/Al颗粒增强复合材料具有高比模量、高比强度、耐磨性好、耐高温和导热导电性能良好等优异性能,使其在工程应用中成为了传统金属的精良替代品。针对体积分数为45%的SiCp/Al颗粒增强复合材料进行切削研究,建立切削仿真模型,从应力场的分布情况、颗粒的断裂与破碎机理以及切屑表面的裂纹扩展等方面对切削机理进行仿真分析,并通过铣削实验进行了验证。结果表明,颗粒的断裂与破碎主要发生在剪切区和工件与切屑的分离面,同时由于颗粒的存在会使切屑表面产生微裂纹,微裂纹的扩展是影响切屑表面形态的重要因素。
The SiCp/Al metal matrix composites have excellent properties such as high specific modulus,high specific strength,good wear resistance,high temperature resistance,good thermal conductivity and electrical conductivity,which make it become excellent substitutes for traditional metals in engineering applications.In this paper,our research is about machining SiCp/Al metal matrix composites with 45%volume fraction and establishing machining simulation model with finite element analysis.The machining mechanism was analyzed from the von mises stress distribution,the fracture and crushing mechanism of the particle and crack propagation on chip surface,and verified by milling experiments.The results show that the fracture and crushing of particles mainly occur in the shear zone and the separation surface between the workpiece and the chips.At the same time,micro cracks will occur on the chip surface due to the presence of particles,the propagation of microcracks is an important factor affecting the surface morphology of metal machining chips.
作者
范依航
霍志倩
郝兆朋
FAN Yihang;HUO Zhiqian;HAO Zhaopeng(School of Mechanical and Electrical Engineering,Changchun University of Technology,Changchun 130000,CHN)
出处
《制造技术与机床》
北大核心
2022年第2期43-49,共7页
Manufacturing Technology & Machine Tool
基金
国家自然科学基金(51605043)
吉林省自然科学基金(20120201064JC)
吉林省教育厅科研项目(JJKKH20210725KJ)。
