A 1cm thick plate of aluminum is reduced in thickness by cold rolling according to the in three steps: 0.7, 0.4, 0.2 cm. Compute the total strain on the basis of initial and final dimensions AND the summation of the incremental strains, using:a. engineering strainb. true strainc. how does this show an advantage for the use of true strain in metalworking?

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.