A double-Westergaard model for adhesive contact of a wavy surface

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES

卷:102

Article

Jin, Fan¹  Wan, Qiang¹  Guo, Xu² 

[1] China Acad Engn Phys, Inst Syst Engn, Mianyang 621900, Sichuan, Peoples R China

[2] Dalian Univ Technol, State Key Lab Struct Anal Ind Equipment, Dept Engn Mech, Int Res Ctr Computat Mech, Dalian 116023, Peoples R China

关键词: Contact mechanics;    Adhesion;    Wavy surface;    Double-Hertz model;    Adhesion hysteresis;   

DOI  :  10.1016/j.ijsolstr.2016.10.016

来源: Elsevier

【 摘 要 】

This paper extends the double-Hertz model of Greenwood and Johnson (1998) to the plane strain problem of adhesive contact between a wavy surface and a flat surface, named as the double-Westergaard model. The adhesive force within the cohesive zone near contact edge is described by the difference between two Westergaard pressure distribution functions with different contact widths. Closed-form analytical solutions are obtained for different equilibrium states during loading and unloading stages. The proposed model captures a transition between Westergaard and JKR contact models through a dimensionless transition parameter. Depending on two dimensionless parameters, transitions between partial and full contact during loading/unloading are characterized by one or more jump instabilities. Decreasing waviness size by decreasing both the amplitude and period with a fixed curvature is found to enhance adhesion both by increasing the magnitude of the pull-off force and by inducing more energy loss through adhesion hysteresis. (C) 2016 Elsevier Ltd. All rights reserved.

【 授权许可】

Free