Question

A rod of length 20 mm is stretched to make a rod of length 40 mm. Subsequently, it is compressed to make a rod of final length 10 mm. Consider the longitudinal tensile strain as positive and compressive strain as negative. The total true longitudinal strain in the rod is​

Answer 1

The total true longitudinal strain in the rod is ε (true) = - 0.69

Step-by-step explanation:

ℓi = 20 mm

• True strain ca be calculated as follow.

ε (true) = ln ( lf / li ) = ln (10/20)

ε (true) = - 0.69

Hence the total true longitudinal strain in the rod is ε (true) = - 0.69

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