A bar assemblage consists of two outer steel bars and an inner brass bar. The three-bar assemblage is then heated to raise the temperature by an amount T = 80°F. Let all cross-sectional areas be A = 2 in2 and L = 60 in., Esteel = 30 × 10 psi Ebrass = 15 × 106 psi, α = 6.5 × 10-6/°F, and αbrass = 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.

Steel Brass Steel 2.