Abstract
Under the assumption of isotropic work hardening, the slip line field, its hodograph and the distributions of strain rate, strain and stress in slow speed, orthogonal and flow-type machining are analysed for both 15° and 35° of tool rake angle by means of visioplasticity and the strain hardening slip line theory. And their variations with the tool rake angle are discussed by comparing these results with that of the first report (in this case, tool rake angle was 25°). The main results obtained are as follows.(1) The strain rate distribution for smaller tool rake angle shows a sharper peak on shear plane.(2) The normal stress near the tool point on the second slip line corresponding to shear plane is compressive or tensile for larger or smaller tool rake angle respectively.(3) The equilibrium of resultant cutting forces on each second slip line and tool face is fairly well satisfied in their directions and force acting points, but is not well satisfied in their magnitudes. The main reason for this may be attributed to neglecting the anisotropy generated in chip.
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