Compute the true stress and the logarithmic strain using the data given below and plot the results on log-log paper. then, find the plastic strength coefficient σ0 and the strain-strengthening exponent m. the yield strength and the ultimate strength after the specimen has had 20 percent cold work. the original diameter of the test specimen is 0.5 in. and the original length, lo = 2.000 in. the following data was obtained for the