Determine the yield load capacities of an aluminum torque arm (E=67 GPa, ν=0.3) by computing the loads, Ppr and Pvm, which cause the maximum principal stress and Von Mises stress to exceed the yield stress of aluminum (131 MPa), respectively. Assume the density of aluminum, rho, to be equal to 2.61 X 10-6 kg/mm3.

Aturning operation is performed with following conditions: rake angle of 12°, a feed of 0.35 mm/rev, and a depth of cut of 1.1 mm. the work piece is aluminum alloy 6061 with t6 heat treatment (a16061-t6). the resultant chip thickness was measured to be 1.0 mm. estimate the cutting force, fc. use shear stress of 207 mpa and coefficient of friction on the tool face of 0.6.