A Method for Measuring Normal and Tangential Forces Under Disk-to-Disk Contact Using Reflection-Type of Caustic Images.

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  • 反射型コースティック像による円板／円板接触における垂直力および接線力の測定法
  • ハンシャガタ コースティックゾウ ニ ヨル エンバン エンバン セッショク ニ オケル スイチョクリョク オヨビ セッセンリョク ノ ソクテイホウ

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The method of caustics has been applied to evaluate normal and tangential forces under diskto disk contact such as in rolling contact fatigue. In this paper, reflection-type caustic images are newly used to generalize the method of caustics. Two caustic images-a cusp-like image formed from the front face and a semi-circle image formed from the back face-were utilized to the evaluation, because they are formed simultaneously. A computer simulation program for the caustic images was coded through theoretical considerations. The simulated caustic images corresponded with experimental caustic images formed from a PMMA disk contacting a steel disk. The experimental formula that expressed using the specific sizes of caustic images has been proposed for obtaining normal and tangential forces. This formula is applicable to Hertzian contact problems, gear face contacts, roller bearings. etc.

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