The non-equidistant shear zone model,which was presented
and proved by Astakhov.et al. [29], is considered as a thin shear
band of constant thickness h ¼ 0:025mm, as shown in Fig. 1. In this
model, the entry boundary (CD) and the exit boundary (EF) are
parallel but non-equidistant to the main shear plane (AB). The shear
band consists of two non-equidistant thickness κh and
h, characterized by the portion In addition,the
shear angle is ϕ, the rake angle of the tool is γ0, the cutting depth is
h0, and the chip thickness is hc. In the hodograph, V; Vc; Vn and Vs
are denoted as the cutting velocity,the chip velocity,the normal
velocity and the shear velocity,respectively.