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A Study of Adhesive Mechanism of Gecko Adhesion System using Adhesive Beam Contact Model  

Kim, Won-Bae (서울대학교 기계항공공학부)
Cho, Maeng-Hyo (서울대학교 기계항공공학부)
Publication Information
Journal of the Computational Structural Engineering Institute of Korea / v.23, no.4, 2010 , pp. 403-407 More about this Journal
Abstract
Gecko adhesion system consists of beam-shaped seta and spatula which has the role of adhesive pad. In this paper, adhesion mechanism of gecko adhesion system is performed by using adhesive beam contact model. this model has a feature of non-uniform stress profile on the contact surface and adhesion/detachment mechanism is determined by the tensile stress of the contact region. a spatula tip pad has the role of reduction of maximum tensile stress and adhesive force is increased due to this effect. As for a reverse loading case, maximum compressive stress drops by the spatula effect and this cause unsymmetric loading conditions between adhesion and detachment forces. In this study, finite element method is used for the analysis of adhesive beam contact model and the results for spatula effect are presented.
Keywords
gecko; seta; spatula; adhesive contact; JKR model; Kendall peeling model; van der Waals; beam; finite element method;
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