Effect of normal load on friction coefficient for sliding contact between rough rubber surface and rigid smooth plane. (December 2015)

• Record Type: Journal Article
• Authors: Maegawa, Satoru; Itoigawa, Fumihiro; Nakamura, Takashi
• Is Part Of: Tribology international. Volume 92(2015)
• Page Start: 335
• Page End: 343
• Publication Date: 2015-12
• Subjects: Friction coefficient -- Normal load -- Rubber -- Real contact area; Tribology -- Periodicals; 621.89
• DOI: 10.1016/j.triboint.2015.07.014
• Languages: English
• ISSNs: 0301-679X

Abstract

Abstract: This study focused on the normal load dependence of the friction coefficient for the sliding friction of a rubber material with a rough surface. A developed friction tester was used to visualize the real contact regions distributed within the transparent contact interface between poly-dimethyl siloxane (PDMS) and glass surfaces. Based on experimental results, an adhesion friction model was developed to explain the normal load dependence of the friction coefficient. This model provides a simple technique that can roughly but easily estimate the real contact area and shear stress without in situ observation of the contact interface. Highlights: ● In-situ observation of contact interface between rough rubber surface and rigid smooth plane. ● The total contact area of PDMS/glass interfaces asymptotically increases with normal load. ● Friction coefficient of PDMS/glass interfaces decreases with normal load. ● The shear strength and real contact area of rubber sliding surfaces were quantified without direct observations of the contact interface.