Taking The Logarithm Of Both Sides Of Equation 6

Taking the logarithm of both sides of Equation 6.19 yields

Taking the logarithm of both sides of Equation 6.19 yields
Thus, a plot of log σT versus log ∈T in the plastic region to the point of necking should yield a straight line having a slope of n and an intercept (at log σT = 0) of log K.
Using the appropriate data tabulated in Problem 6.29, make a plot of log σT versus log ∈T and determine the values of n and K. It will be necessary to convert engineering stresses and strains to true stresses and strains using Equations 6.18a and 6.18b.

Taking the logarithm of both sides of Equation 6.19 yields

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