弾性流体潤滑下におけ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 years, the techniques 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). However, the high stresses are locally generated because of the high oil pressure concentrated into a small area under EHL conditions. As a result, the failure of coated film might be caused when the generated stresses are beyond the strength of coated material. Therefore it is important to take the stress distribution of coated films into consideration for the successful design of mechanical elements including coated films. In this paper, numerical three-dimensional analysis of the von Mises stress applied into the coated film and substrate under EHL condition was performed with a range of coated film thickness and elastic properties. The strength of coated film as one of those techniques was evaluated numerically, resulting in an optimum design of coated film. As a result, coated films with a larger value of thickness and a smaller modulus of elasticity than that of substrate are preferable.
社団法人日本機械学会の論文
2009-02-25