Abstract
Rubber is mostly modeled as a hyperelastic material and as a consequence, large deformation occur along friction contact against a rigid counterface. In general, Coefficient of friction (COF) of a contact surface consists of two components, i.e. adhesion and deformation (hysteresis). However, it is difficult to investigate the deformation component of COF analitically on the rubber sliding. By means of a rigid blade sliding indentation technique, this paper studies the friction contact phenomena on Unfilled Styrene Butadiene Rubber (SBR-0) numerically by using a Finite Element Analysis (FEA) in plane strain mode. By a given sliding speed, the FEA simulation is carried out with the various adhesion COF and sliding depth. The presented simulation output are stress, deformation and reaction forces. Results show that the deformation COF strongly depends on the sliding displacement. Finally, the overall COF highly increases and then decreases with respect to the sliding displacement and tends to indicate stick-slip phenomena.
Highlights
Elastomers or rubbers are used extensively in many industries because of their wide availability and low cost
The Finite Element Analysis (FEA) output with the sliding depth 0.5 mm and adhesion Coefficient of friction (COF) 0.5 is depicted in these figures in the initial state, the sliding state and the final state respectively
This paper proposes a numerical investigation to identify the friction contact on the rigid blade sliding along unfilled rubber surface
Summary
Elastomers or rubbers are used extensively in many industries because of their wide availability and low cost. They are used because of their excellent damping and energy absorption characteristics, flexibility, resiliency, ability to seal against moisture and variable stiffness. The unique properties of rubber are such that, it can undergo large deformations under load, sustaining strains of up to 500 percent in engineering applications and its load-extension behavior is nonlinear. Proper analysis of rubber components requires special material modeling and nonlinear finite element analysis tools that are quite different than those used for metallic parts. Due to the nonlinearity behaviour and large deformation under load, rubber is mostly modeled as hyperelastic material [1]. It is difficult to investigate the contact phenomena from the rubber friction analitically
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