表面応力と表面弾性定数を考慮した半無限異方性弾性体の接触解析

概要

論文の詳細を見る
In this paper, a contact analysis of the anisotropic elastic half-domain was performed using a surface Green's function considering surface stress and surface elasticty. Fast Fourier transform (DC-FFT) method and conjugate gradient (CG) method were used for conducting the contact analysis. Displacement field calculated from the surface Green's function was compared with that in molecular dynamics analysis which an atom was set on the surface. The displacement in MD was similar to that in Green's function at z=0.2nm from the surface. A contact analysis for a spherical indenter with the radius of 4nm and a flat surface of the anisotropic elastic half-domain was firstly performed, and then indentation modulus was obtained. The load-penetration depth curves for MD and the present analysis were compared, and the present result considering surface stress and elasticity was agreement with those for MD. A contact analysis was conducted for investigating the effect of the material anisotropy on the penetration depth for the indenters of four kinds, elliptic, Knoop, Berkovich and Vickers. The indenters were rotated with respect to the z-axis. It was found that the penetration depth for elliptic and Knoop indenters demonstrated the effect of material anisotropy for the indenter orientation, although, Berkovich and Vickers indenters little showed.
社団法人日本機械学会の論文
2009-08-25