1.

The plastic strain ratio is defined as the _______________ (where Wi, Wf is initial and final width of work piece, Li, Lf is initial and final length of work piece).

A. ln(W<sub>i</sub>/W<sub>f</sub>)
B. ln(W<sub>i</sub>/W<sub>f</sub>)/ln(L<sub>i</sub>/L<sub>f</sub>)
C. ln(W<sub>i</sub>/W<sub>f</sub>)/ln(L<sub>f</sub>W<sub>f</sub>/L<sub>i</sub>L<sub>f</sub>)
D. ln[(W<sub>i</sub>/W<sub>f</sub>)/(L<sub>f</sub>W<sub>f</sub>/L<sub>i</sub>L<sub>f</sub>)]
Answer» D. ln[(W<sub>i</sub>/W<sub>f</sub>)/(L<sub>f</sub>W<sub>f</sub>/L<sub>i</sub>L<sub>f</sub>)]


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