机械结合面微观接触模型及接触特性研究  

Study on Micro Contact Model and Contact Characteristics of Joint Surface

作　　者：王立华[1] 王鹏程[1] 杨竹[1] 何雨松[1] 

机构地区：[1]昆明理工大学机电工程学院,昆明650500

出　　处：《机械设计与研究》2015年第4期69-74,共6页Machine Design And Research

基　　金：国家自然科学基金资助项目(51165013)

摘　　要：通过原子力显微镜(AFM)实测得到机械结合面的真实三维微观表面形貌,同时基于分形理论模拟仿真得到了机械结合面三维微观表面形貌,分析结果表明,分形模拟表面形貌能较好地模拟机械结合面的真实微观表面形貌。进一步分别以实测的结合面表面形貌和基于分形理论模拟的表面微观形貌建立结合面的三维表面微观接触模型,运用有限元法进行接触仿真分析,研究真实微观表面之间的微观弹性及弹塑性接触特性,通过仿真分析得到Z向位移、接触面积和接触压力与接触载荷间的关系曲线。结果表明,基于分形理论建立的机械结合面分形模拟微观接触模型可以替代实测真实微观接触模型进行仿真分析。本研究能为深入开展结合面微观作用机理的研究提供理论依据。The real and simulating three-dimensional microscopic topography of the joint surface are obtained by atomic force microscopy （AFM） and based on the fractal theory respectively. The results show that the fractal simulation surface topography can simulate the real microscopic surface topography of the joint surface well. Then the three-dimensional microscopic surface contact models of the joint surface are set up using the measuring microscopic topography and the fractal simulation surface topography separately. The contact simulation analyses are carried out using finite element method and the microscopic elasticity and elastic-plastic contact characteristics between the real three-dimensional microscopic surfaces are studied. The curves between the displacement along Z axial, contact area, contact pressure and contact load are obtained by simulating. The results show that the measured real micro-contact model of joint surface can replaced by the simulation micro-contact model based on fractal theory. This study provides a theoretical basis for further research on the microscopic mechanism of the joint surface.

关 键 词：机械结合面 微观 接触特性 分形理论 

分 类 号：TH113[机械工程—机械设计及理论]