Abstract
Especially for performance in wet conditions, design of real contact formation is important to improve grip properties of footwear outer-soles and vehicle tires. Lubricant intervention between rubber and a surface is expected to be changed by the contact velocity and physical properties of the rubber: radius of curvature and elastic modulus. The influences of these parameters on real contact formation between a rubber hemisphere and glass plate in a contact process under a water-lubricated condition were investigated. The ratio between real and apparent contact areas increased with contact time as determined by these parameters. The explanation is based on dewetting behavior. • Real contact formation in contacting and stationary phases was investigated. • Real contact area decreased with contact velocity. • Real contact ratio was sensitive to radius of curvature and elastic modulus. • Real contact ratio had a positive correlation with contact time.
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