Question

How is shear zone theory different from single shear plane theory?

Answer 1

A small shear plane angle requires more energy for the same shear stress than the optimum. The energy required in the secondary zone on the friction face increases as the shear plane angle increases. The total grinding energy is the sum of the energies in each shear zone as illustrated for orthogonal cutting in Fig.

Answer 2

A small shear plane angle requires more energy for the same shear stress than the optimum. The energy required in the secondary zone on the friction face increases as the shear plane angle increases. The total grinding energy is the sum of the energies in each shear zone as illustrated for orthogonal cutting