ABSTRACTIn the present work, the frictional behavior of rubber sliding against dry ceramic flooring was investigated. The effect of hardness of the rubber as well as the thickness and the groove width of the treads introduced in the rubber surface on friction coefficient was tested. It was found that friction coefficient decreased with increasing rubber hardness due to decrease of rubber deformation. Increasing rubber thickness increased deformation and friction coefficient. Presence of grooves in rubber surface facilitated increasing deformation and escaping air bubbles from rubber gaps to grooves so that the adhesion between rubber and ceramic increased which increased friction coefficient. As groove width increased, higher amount of air escaped from surface gaps so that contact area increased and consequently friction coefficient increased. The highest friction coefficient values were recorded for rubber of 8 mm thickness, 6 mm groove width and 30 Shore A hardness. This was due to the high rubber thickness and the wide groove width which increased rubber deformation. It is recommended for walking to use the treaded rubber instead of smooth rubber.
Ali et al. (Tue,) studied this question.
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