楕円接触の内部応力の計算について

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By re-examining the method proposed by Thomas and Hoersch, the author developed a new method, which does not use elliptic integral, for calculating stresses in a solid under elliptical Hertz contact pressure. Dimensionless parameters calculated by this method agree well with their calculation. Stress distribution and the depth of maximum shear can thus be calculated by incorporating the new method into a spreadsheet program for personal computers. 2664Spreading characteristics of molecularly thin lubricant on a grooved surface have been studied numerically by Monte Carlo simulations and compared with measurements obtained by perfluoropolyether (PFPE) thin film spreading on a solid surface with minute grooves. In the simulations, by incorporating the interactions between molecules and the side surfaces of a groove, the Monte Carlo method based on the Ising model was extended to the case of a surface with grooves and applied to simulate the spreading of non-polar lubricant inside a groove. Compared with the spreading on a smooth surface, lubricant spreads rapidly inside a groove, indicating an acceleration of the spreading along the groove. In the experiments, lubricant spreading on surfaces with groove-shaped textures was measured by making use of the phenomenon in which diffracted light vanishes in the lubricant-covered region. Based on the results showing lubricant spreading predominantly along the groove, the accelerating effect obtained in the simulations is well confirmed by the measurements.
一般社団法人日本機械学会の論文
2001-08-25

楕円接触の内部応力の計算について

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