微沟槽织构设计对PDMS表面黏-滑摩擦学行为的影响  

Effect of Micro-Groove Textures on the“Stick-Slip”Behaviors of Tribology of Soft Materials

作　　者：施文斌 肖汉 崔坤杰 王涛 时礼平[1,2] 吴玉国[1] 李蒙 SHI Wenbin;XIAO Han;CUI Kunjie;WANG Tao;SHI Liping;WU Yuguo;LI Meng(School of Mechanical Engineering,Anhui University of Technology,Anhui Ma’anshan 243002,China;Wuhu Technology and Innovation Research Institute,Anhui University of Technology,Anhui Wuhu 241002,China)

机构地区：[1]安徽工业大学机械工程学院,安徽马鞍山243002 [2]安徽工业大学芜湖技术创新研究院,安徽芜湖241002

出　　处：《摩擦学学报（中英文）》2024年第1期70-77,共8页Tribology

基　　金：国家自然科学基金项目(52205178);安徽省自然科学基金项目(2108085QE228,2108085ME174)资助。

摘　　要：“黏-滑”现象是软材料表面摩擦学行为典型的特征,易诱发机械系统的振动与噪音等问题.本文中采用激光加工技术在PDMS(Polydimethylsiloxane,聚二甲基硅氧烷)表面加工了沟槽状织构阵列,研究不同参数织构设计对软材料表面“黏-滑”摩擦行为的影响.结果表明沟槽织构可以有效抑制软材料表面“黏-滑”行为,降低界面摩擦阻力,但沟槽的作用效能依赖于其倾斜角设计.此外,界面滑动速度和沟槽织构宽度也是影响表面摩擦学行为的主要因素.The soft polymers,an important component of modern materials have a wide range of applications in the field of mechanical engineering,biomedicine and aerospace.Compared with hard materials,such as metals,ceramics,ect.,the soft polymers usually feature a periodic behavior of“stick-slip”in their surficial tribological performances due to the low elastic modulus and viscoelasticity,which has attracted much scientific attention.The“stick-slip”is a surficial instability stemming from the adhesive interaction in contact region,behaving as two contact counterparts first strongly stick,and then suddenly rupture for a relative motion in the time domain.The normal load and interfacial sliding velocity have a great influence.From the viewpoint of engineering,the unstable tribology behavior of“stick-slip”on polymer surface is very easy to cause disturbances for the mechanical systems(such as car tires,wipers,and lip seals),resulting in the vibrations and noises.As a result,how to effectively restrain and control the“stick-slip”tribological behavior on the soft polymer surfaces seems an interesting question,which also has important significance for the mechanical engineering.In the present paper,the textures of micro-grooves on PDMS(Polydimethylsiloxane)surfaces had been fabricated using laser processing.We studied the effects of micro-grooves on the tribology behavior of“stickslip”on soft surfaces during a dry sliding,and also analyzed the influences of the parameters of groove orientation angle,groove width,normal load and sliding velocity.In the experimental section,PDMS(Sylgard 170,Dow Coming Corp,USA)was selected as the base material,and the sample was fabricated into the shape of symmetrical wedge structure;the two parts of A and B from the Sylgard 170 product were mixed with the mass ratio of 1:1,and then was cured at 70℃ for 1 h.After the demolding,the PDMS sample was a black solid with the Young′s modulus of about 0.68 MPa and the Shore hardness of about 40 HA.Tribological tests of samples wer

关 键 词：“黏-滑”行为 软材料 摩擦学 黏弹性 表面织构 

分 类 号：TH117.1[机械工程—机械设计及理论]