Abstract
This paper reports on the cutting characteristics of a polycarbonate (PC) worksheet mounted on flexible underlays by wedge indentation. In order to investigate the effect of underlay stiffness on sheared profile of PC worksheet, an underlay stiffness in thickness direction ku was varied by introducing the ku=Eu/tu as the underlay Young's modulus Eu by the underlay thickness tu. On the experimental works, we found that the underlay mechanical properties affected the cutting load response and deformation features of the PC sheet. Through the experiment and FEM simulation, the followings were obtained : the deformation profile of PC sheet remarkably depends on the stiffness ratio of underlays, when the stiffness ratio is less than a certain value.
