a b (2) d A (1) P B Answer: EAB = i με EBC = i με

The two bars are used to support load P. When unloaded, joint B has coordinates (0, 0). After load P is applied, joint B moves to the coordinate position (-0.46 in., -0.20 in.). Assume a = 15 ft, b = 30 ft, c = 10 ft, and d = 20 ft. Determine the normal strain in each bar. A Answer: EAB EBC = i i P a (1) B με με X b (2) C d

For the beam shown: 1. Draw the free-body diagram (FBD) and determine the reactions at the supports. 2. Determine the internal forces and draw their diagrams. 3. Design the beam using IPE shape. 4. Draw the stress diagram in the critical cross section. Data: F= 60 kNm, L = 1 m, 0 = 120 MPa. I IPE A F L #C L B

A simple pin-connected truss is loaded and supported as shown. The truss is constructed from three aluminum members, each having a cross-sectional area of A = 1160 mm2. Assume a = 2.3 m, b = 6.8 m, and c = 2.8 m. If P = 50 kN and Q = 75 kN, determine the normal stress in each member. L. Answers: JAB OBC i i JAC= i P b MPa (C) MPa (T) MPa (T)