1. For the plane truss shown in Figure P15–4, bar element 1 is subjected to a uniform temperature…


1. For the flatten truss shown in Shape P15–4, bar part 1 is subjected to a alike atmosphere loosen of 30 F. Let E = 30 106 psi, A = 2 in2, and a = 7:0 10-6 (in./in.)/ F. The lengths of the truss parts are shown in the shape. Determine the stresses in each bar. (Hint: Use Problem 3.21 for (K .)

2. For the edifice shown in Shape P15–5, bar part 1 is subjected to a alike atmosphere loosen of T = 20 C. Let E = 210 GPa, A ¼=2 10-2 m2, and a = 12 10-6 (mm/mm)/ C. Determine the stresses in each bar.