A bar assemblage consists of two outer steel bars and an inner brass bar. The threebar assemblage is then heated to raise the temperature by an amount T = 40 _F. Let all cross-sectional areas be A = 2 in2 and L = 60 in., Esteel = 30 × 106 psi, Ebrass = 15 × 106 psi, asteel = 6:5 × 10–6/ ° F, and abrass = 10 × 10–6/ ° F. Determine (a) the displacement of node 2 and (b) the stress in the steel and brass bars. See Figure P15–8.
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