The two cylindrical rod segments are fixed to the rigid walls such that there is a gap of 0.01 in. between them when T₁= 60°F. Each rod has a diameter of 1.25 in. Determine the average normal stress in each rod if T₂= 400°F, and also calculate the new length of the aluminum segment. Take α_al= 13(10^€“6)/°F, E_al= 10(10³) ksi, (σ_Y)_al= 40 ksi, α_cu= 9.4(10^€“6)/°F, (σ_Y)_cu= 50 ksi, and E_cu= 15(10³) ksi.

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0.01 in. Aluminum Copper -12 in: -6 in.-