Pursuit of real contact area up to the complete contact: study on two-dimensional regular wavy surface of rubber under atmosphere and decompression environments

Matsuda, Kenji, Okuda, Yozo, Nakamura, Kenya

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全面接触に至るまでの真実接触面積の追跡― ゴムを用いた大気圧および減圧下における二次元規則性凹凸面の検討 ―
ゼンメンセッショクニイタルマデノシンジツセッショクメンセキノツイセキゴムオモチイタタイキアツオヨビゲンアツカニオケル 2ジゲンキソクセイオウトツメンノケントウ

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Description

The elastic contact of two-dimensional regular wavy surface with a flat surface is studied by using three types of blocks of silicone rubber as specimen. The effect of the surface profile on the growth of the real contact area is investigated from the first touch to the complete contact. The experimental results show the formation of the percolation channels allowing the leakage of fluid and the dependence of the size of the contact area on the load are markedly affected by the shape of the valley of the wavy surface. In the case of the specimen with U-shaped trough, each contact spot touches the neighbors before complete contact, resulting in the extinction of the percolation channels. In this case, the real contact area linearly increases with the load if the real contact area approaches the complete contact. On the other hand, in the case with V-shaped trough, the percolation channels could be hardly extinguished. The effect of the air entrapped between the contact surfaces is also discussed.

Journal

トライボロジスト

トライボロジスト 55 (7), 509-517, 2010

日本トライボロジー学会

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