고체역학 (Beer) — Introduction—Concept of Stress: Problem 1.56

1.56 In an alternative design for the structure of Prob. 1.55, a pin of 10-mm diameter is to be used at A. Assuming that all other specifications remain unchanged, determine the allowable load P if an overall factor of safety of 3.0 is desired. [Referenced specifications from Prob. 1.55: 12-mm diameter pins are used at B and D. The ultimate shearing stress is 100 MPa at all connections (pins) and the ultimate normal stress is 250 MPa in each of the two links joining B and D. Geometry from Fig. P1.55: \(L_{AB} = 200 \text{ mm}\), \(L_{BC} = 180 \text{ mm}\). Link BD width \(w = 20 \text{ mm}\), thickness \(t = 8 \text{ mm}\) for each of the two links. Bar ABC thickness at B is \(12 \text{ mm}\).]