弾性流体潤滑下における中間層を有するコーティング膜の強度評価と設計指針(機械要素,潤滑,工作,生産管理など)

概要

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In recent year, the techniques for improving sliding performances have progressed by using coated films possessing superior tribological properties, to reduce the failures of the mechanical elements. Those techniques are often used under severe conditions such as elastohydrodynamic lubrication (EHL). In this paper, the stresses generated into the coated film with the interlayer are analyzed by using the numerical three-dimensional analysis method, and then the strength of the coated film with the interlayer is evaluated numerically, resulting in an optimum design of the coated film with interlayer. As a result, it was shown that in case that a ratio of the modulus of elasticity of the coated film E_c to that of the substrate E_s is 0.50, it is preferable that the thickness of the coated film and the interlayer are thicker, and that the modulus of elasticity of the interlayer is given within the range from that of the coated film to that of the substrate. Furthermore, it was shown that in case of E_c/E_s=2.00, it is preferable to have the thicker interlayer thickness without considering the value of the modulus of elasticity of the coated film and the interlayer.
2009-07-25