A 1-ft-long rod is made from the material of Problem P5.11. By what amount must the rod be stretched from its original length for it to begin yielding?

Problem P5.11

Determine the elastic modulus and the yield strength for the material having the stress–strain curve shown in Figure P5.11. Use the 0.2% offset method.

Figure P5.11

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1600 1400 1200 名 1000 800 600 400 200 0.5 1 1.5 2 Strain, percent Stress, psi