Referring to the FBD of the rigid beam, Fig. a, Referring to the geometry shown in Fig.

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Referring to the FBD of the rigid beam, Fig. a,

+12F, = 0; FAD + FBE + FCF - 50(10) – 80(10) = 0 %3D (+YMp = 0; Fge(2) + FCr(4) – 50(10)(1) – 80(10)(3) = 0

Referring to the geometry shown in Fig. b,

FAD + FCF = 2 FBE


Solving Eqs. (1), (2), and (3) yields

FBE = 43.33(103) N      FAD = 35.83(103) N     FCF = 50.83(103) N


Thus,

 ÏƒCF = 113 MPa


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Mechanics of Materials

ISBN: 978-0134319650

10th edition

Authors: Russell C. Hibbeler

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