EFFECT OF RUBBER DEFORMATION ALONG SLIDING CONTACT ON ITS STRESS AND FRICTION FORCE: A NUMERICAL INVESTIGATION Budi Setiyana, Rifky Ismail, S. Sugiyanto, J. Jamari
Mechanical Engineering Department, Faculty of Engineering, University of Diponegoro, Jl. Prof. Soedharto SH, Kampus Tembalang, Semarang 50275
Abstract
Rubber is a material that easily deforms when subjected to friction, such as in tires, seals and transmission belts. It is very important to understand the relationship of deformation to its stress and friction forces that occur on the rubber. The stress and friction force that occur are closely related to the strength and braking capacity of the rubber, especially for the rubber used in tires. This paper investigates the effect of rubber deformation along friction on its stress and friction force of the rubber surface. Friction contact between the rubber surface and a rigid indenter is modelled numerically using Finite Element (FE) software. Analyzed rubber is Styrene Butadiene Rubber (SBR) and considered as a hyper-elastic material based on Mooney-Rivlin model. Analysis is carried out at specified depth of indentation, surface roughness and sliding speed. Results show that the degree of deformation will be higher for the larger indentation depth and surface roughness. Along friction, the high degree of deformation causes high stress and friction forces of the rubber surface, however, fluctuating value of those parameters is obtained here.
