不同接触尺度下PVA/HA复合水凝胶的滑动摩擦行为  

Sliding Friction Behavior of PVA/HA Composite Hydrogels Under Different Contacting Scales

作　　者：崔晓彤[1] 刘金龙[1] 张德坤[1] 陈凯[1] 亓健伟 

机构地区：[1]中国矿业大学材料科学与工程学院,江苏徐州221116

出　　处：《材料工程》2016年第5期59-64,共6页Journal of Materials Engineering

基　　金：中国博士后科学基金(2015M580487);清华大学摩擦学国家重点实验室开放基金(SKLTKF12A06);江苏省自然科学基金青年基金项目(BK20130200)

摘　　要：采用UMT-II型多功能摩擦磨损试验机研究了不同接触尺度下PVA/HA复合水凝胶的滑动摩擦行为,并利用有限元模拟方法对PVA/HA复合水凝胶的滑动摩擦机理进行了探讨。结果表明:滑动过程中PVA/HA复合水凝胶的平均摩擦力、平均摩擦因数及变形深度随接触压头直径的增加逐渐减小,而随着接触载荷呈逐渐增加的趋势;随着接触压头直径的增加,液相的承载能力增大,从而平均摩擦力、变形深度减小;随着接触载荷的增加,液相流失增加,液相的承载力降低,从而平均摩擦力、变形深度增大。UMT-II multi-functional friction and wear tester was used to investigate the sliding friction behavior of polyvinyl alcohol/hydroxyapatite（PVA/HA）composite hydrogel under different contac- ting scales, and the sliding friction mechanism of PVA/HA composite hydrogel was studied by finiteelement method （FEM）. The results show that in the process of the sliding friction, the average fric- tion, the average friction coefficient and the deformation depth of PVA/HA composite hydrogel de- crease gradually with the contacting diameter increasing, and exhibit an increase trend with the con- tacting load as the contact diameter increases, the fluid load support increases, then the average fric- tion and deformation depth decrease as the contact load increases, the loss of the liquid phase increa- ses, then the fluid load support decreases, which causes that the average friction and deformation depth increase.

关 键 词：PVA/HA复合水凝胶 滑动摩擦 有限元 液相承载 

分 类 号：R318.01[医药卫生—生物医学工程]