Nano Science and Technology Institute
Nanotech 2002 Vol. 2
Nanotech 2002 Vol. 2
Technical Proceedings of the 2002 International Conference on Computational Nanoscience and Nanotechnology
Chapter 13: Nanoscale Modeling for Condensed-Matter Phenomena

Three Dimensional Adhesion Model for Arbitrary Rough Surfaces

Authors:S. Deladi, G. Krijnen, N.R. Tas and M.C. Elwenspoek
Affilation:University of Twente, LN
Pages:326 - 329
Keywords:adhesion model, surface topography, bonding energy, deformation regime, microstructures
Abstract:We present a 3D adhesion model based on the JKR theory applied locally for all contacting asperity couple and the calculations account the van der Waals interaction beside the externally applied force. Thus, equilibrium of the system is determined by an extremum in the free total energy and subsequently the contact and the adhesion parameters are computed for that particular position. The model estimates the adhesion of contacting arbitrary rough surfaces taking into account that asperities deform according to one of the three deformation regimes (elastic, elasto-plastic and plastic). The deformation of the contacting asperities is determined by the material properties, the asperity characteristics as well as the surface topography. Results show that even outside the bonding regime the specific bonding energy is still high enough to cause adhesive problems for microstructures.
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