Question: 5 - 8 7 The stepped bar shown in Fig. P 5 - 8 7 has a 0 . 7 5 - in . -

5-87 The stepped bar shown in Fig. P5-87 has a 0.75-in.-diameter over half its length and a 1.25-in.-diameter over the other half. The bar is made of an aluminum alloy with the idealized stressstrain diagram shown in Fig. 5-24. Determine
a. The change in length of the bar when P=10,000lb.
b. The change in length of the bar when P=20,000lb.
Figure P5-87
5 - 8 7 The stepped bar shown in Fig. P 5 - 8 7

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