Cutting Characteristics of Silicone Rubber Sheet with Respect to Indentation Velocity of Keen Wedge Blade

Abstract

This research work is intended to reveal the cutting characteristics of a Shore A hardness of 50 silicone rubber sheet, which was stacked on a Shore A hardness of 90 silicone rubber underlay, indented with a 13.9° tungsten carbide blade. In a previous report (Mitsomwang et al., 2014), the velocity-dependent response was not sufficiently discussed. The cutting velocity of the blade was chosen to be in the range of 0.00167-0.29 mm∙s^-1 to investigate the cutting characteristics derived from Eq. 5 the first inflection point P₁ and the peak maximum point P_max in the relationship between cutting line force and indentation depth. The correlation of points P₁ and P_max with the in-plane tensile testing characteristics was revealed with respect to feed velocity. Also, a dependence of the roughness of the cut surface on the cutting velocity was observed.