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Contact analysis on self-affine surfaces using finite element method
S. Hyun(현상일),L. Pei,J.-F. Molinari,M. O. Robbins 대한기계학회 2004 대한기계학회 춘추학술대회 Vol.2004 No.10
Finite-element methods are used to study non-adhesive, frictionless contact between elastic solids with self-affine surfaces. We find that the total contact area rises linearly with small loads. The mean pressure in the contact regions is independent of load and proportional to the root-mean-square slope of the rough surface. Connected contact clusters show different patterns from fractal-like contact areas normally observed in experiments. The probability of finding a cluster area a<SUB>c</SUB> drops as a<SUB>c</SUB><SUP>-r</SUP> where r depends on roughness exponent. The distribution of pressures drops exponentially in the high pressure regime where plastic deformation may occur.