抄録
This paper reports for the cutting mechanism of a thin worksheet on a flexible underlay by wedge indentation. The effect of underlay's rigidity on the cutting characteristics and separation limit of aluminum foil is studied. Indentation of a 42 degree center bevel blade into a 10μm thickness aluminum foil mounted on several flexible underlays was carried out experimentally and numerically. For discussing the effect of the underlay yield stress and Young's modulus on the deformation behavior of worksheet, an elasto-plastic finite element analysis was carried out. The followings were obtained: (i) the deformation features of the worksheet on a flexible underlay is classified into three patterns: the hard, the mixture, and the floating mode; (ii) there are upper bound rigidities and the lower bound rigidities of the floating phenomenon; (iii) the floating phenomenon is evidenced when the rigidities of underlay are less than the lower bound rigidities; (iv) the mixture mode enables to cut off a worksheet using a bending elongation effect on the outer surface of worksheet.
