Author(s)

K. Sato

Abstract

This paper describes two approaches to simulate caustic images formed from contact points. One is based on the hertzian contact theory and another is based on the boundary element method. By using the characteristics of the caustic images, the values of traction and tangential force coefficient can be determined. These approaches can be applied to analyse contact problems in rolling contact fatigue, fretting fatigue, etc. 1 Introduction The method of caustics is an optical technique utilising caustic images formed by light rays transmitted through or reflected from near stress singularity fields such as contact point, crack tip, notch root, etc. [1]. Theocaris [2] has discussed the theoretical aspect and geometry of the caustic image formed by the c

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