For the structure shown in Figure P15–5, bar element 1 is subjected to a uniform tempera...

For the structure shown in Figure P15–5, bar element 1 is subjected to a uniform temperature rise of T = 20 ° C. Let E = 210 GPa, A = 2 × 10^–2 m², and α = 12 × 10^–6 (mm/mm)/ ° C. Determine the stresses in each bar.