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‑/ 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.