基于单步塑性变形体积量的表面微观变形研究  

The research of micro-deformation about interference fit surfaces based on single-step plastic deformation

作　　者：沈健[1] 王瑞强[1] 周丹[1] 刘光复[1] 杜晓东[1] 

机构地区：[1]合肥工业大学机械与汽车工程学院,合肥230009

出　　处：《现代制造工程》2016年第11期63-67,共5页Modern Manufacturing Engineering

基　　金：国家重点基础研究发展计划(973)项目(002011CB0135);青年科学基金项目(51405121)

摘　　要：为实现粗糙表面微观接触磨损的准确预测,结合分形接触理论,根据弹塑性变形机理,构建了基于单步塑性变形体积量的表面损伤分析模型。将Ansys软件模拟分析结果代入该模型,得出了塑性相关量与接触间距的关系,以及磨损系数与表面粗糙度的关系。计算结果表明,在表面粗糙度越大、表面接触间距越小的情况下,塑性变形体积量越多,损伤就越严重,配合表面的粘着损伤也会变多。接触间距为50nm时是表面磨损系数变化的转折点,当间距小于此阈值时,磨损系数会明显增加;不同表面粗糙度的接触表面,磨损系数的数量级为10-4。To predict contact wear between two surfaces microscopically,construct wear analysis model based on plastic deforma- tion and fractal theory. The Ansys numerical results is imported into the analysis model, and then the relationship between relevant plastic deformation and contact interference and the relationship between wear coefficient and surface roughness are obtained. The results show that the more surface roughness and the less contact interference will result in the larger asperity contact area, the more plastic deformation and in turn the more severe wear. The contact interference 50nm is a turning point,wear coefficient will increase significantly when contact interference is smaller than 50nm. Although contact surfaces have different surface roughness, the wear coefficient is on the order of 10^-4.

关 键 词：塑性变形 损伤模型 磨损系数 

分 类 号：TH117.1[机械工程—机械设计及理论]