ファンデルワールス力を考慮した凝着接触解析

抄録

In the present paper, an adhesive contact analysis of a rigid sphere and a half-elastic region is conducted using DC-FFT method. In the analysis, the van der Waals force is taken into formulation of contact analysis. Values of surface energy used in the analysis are obtained through Tabor parameter. Dimensionless radii of spherical indenter are 5, 10 and 15. When the indenter approaches to the substrate, the substrate is firstly pulled up by tensile force, and adhesion occurs. The contact pressure is almost flat in the first adhesion area. When the indenter moves down, the compressive force occurs at the center of adhesion area. The tensile force exists around the edge of adhesion area. The gap between the indenter and the substrate at the edge of adhesion area varies with surface energy from ε₀ to 1.2ε₀.