고체역학 (Beer) — Pure Bending: Problem 4.38

4.37 Three wooden beams and two steel plates are securely bolted together to form the composite member shown. Using the data given in the table, determine the largest permissible bending moment when the member is bent about a horizontal axis. Material Modulus of elasticity Allowable stress Wood \(2 \times 10^6\) psi 2000 psi Steel \(29 \times 10^6\) psi 22,000 psi (Dimensions from Fig. P4.37: Three 2-in. wide wood beams, two 1/4-in. thick steel plates, total height = 10 in. The arrangement is Wood - Steel - Wood - Steel - Wood.) 4.38 For the composite member of Prob. 4.37, determine the largest permissible bending moment when the member is bent about a vertical axis.