Using the method of Section 3.5, determine the axial stress in each of the bar elements shown in Figure P3-18.

(a)

(b)

E = 30 x 1 psi A = 2 in? L = 60 in. 41 = 0 42- 0.02 in. V2 = 0.04 in. 45 E = 210 GPa A- 3 x 10- m? L = 3 m "1 = 0.25 mm U2 = 1.00 mm V - 0.0 V2 = 0.0 30