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. . 1.] Rod ABC is made from high strength reinforced steel. It is subjected to 16 kip load at A and 51.2 kip load at B, as shown. Determine, a) The displacement of point A? [5] Answers: b) The displacement of point B? [5] Displacement at A, SA c) The maximum stress in member AB? [4] Displacement at B, SB d) The maximum stress in member BC? [5] e) Factor of safety of member AB? [3] Maximum stress in AB, OAB f) Factor of safety of member BC? [3] Maximum stress in BC, OBC Note: rod ABC should not be loaded above the yield stress of the material. Safety factor of member AB, SF AB 33 in. Safety factor of member BC, SFBC 24 in. . 0.75 in. diameter 2.25 in. diameter 51.2 kip 16 kip A B
Ultimate Strength Yield Strength Modulus Modulus Coefficient Ductility, Specific of Compres- of of Thermal Percent Weight, Tension, sion, Shear, Tension, Shear, Elasticity, Rigidity, Expansion, Elongation lb/in|ksi ksi ksi ksi 10 psi 10 psi 10-70F in 2 in. Material ksi Reinforcing Steel Medium strength High strength 0.283 0.283 70 90 40 60 29 29 11 11 6.5 6.5