For the plane truss shown in Figure P15–3, bar element 2 is subjected to a uniform temperature rise of T = 50 ° F. Let E = 30 × 106 psi, A = 2 in2, and a = 7:0 × 10–6 (in./in.)/ ° F. The lengths of the truss elements are shown in the figure. Determine the stresses in each bar. [Hint: See Eqs. (3.6.4) and (3.6.6) in Example 3.5 for the global and reduced [K matrices.]
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