The aluminum test specimen shown is subjected to two equal
Chapter 2, Problem 2.134(choose chapter or problem)
The aluminum test specimen shown is subjected to two equal and opposite centric axial forces of magnitude P. (a) Knowing that E = 70 GPa and \(\sigma_{\text {all }}=200 \mathrm{MPa}\), determine the maximum allowable value of P and the corresponding total elongation of the specimen. (b) Solve part a, assuming that the specimen has been replaced by an aluminum bar of the same length and a uniform 60 X 15-mm rectangular cross section.
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