Adhesive behavior of two-dimensional power-law graded materials

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES

卷:46

Article

Chen, Shaohua¹  Yan, Cong¹  Soh, Ai Kah² 

[1] Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China

[2] Univ Hong Kong, Dept Mech Engn, Hong Kong, Hong Kong, Peoples R China

关键词: Contact mechanics;    Adhesion;    Elastic graded materials;    JKR model;   

DOI  :  10.1016/j.ijsolstr.2009.05.006

来源: Elsevier

【 摘 要 】

In this paper, we investigate the adhesive contact between a rigid cylinder of radius R and a graded elastic half-space with a Young's modulus varying with depth according to a power-law, E = E-0(y/c(0))(k) (0 < k < 1), while the Poisson's ratio v remains constant. The results show that, for a given value of ratio R/C-0, a critical value of k exists at which the pull-off force attains a maximum; for a fixed value of k, the larger the ratio R/c(0), the larger the pull-off force is. For Gibson materials (i.e., k = 1 and v = 0.5), closed-form analytical solutions can be obtained for the critical contact half-width at pull-off and pull-off force. We further discuss the perfect stick case with both externally normal and tangential loads. (C) 2009 Elsevier Ltd. All rights reserved.

【 授权许可】

Free