(a) Starting with Eq. (48) for the maximum bending stress in a curved beam of rectangular...

(a) Starting with Eq. (48) for the maximum bending stress in a curved beam of rectangular cross section, add the effect of the direct stress and arrive at an expression for the resultant normal stress for point B in Fig. 1 in terms of load P, area of cross section A, and ratio cI.

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(b) If σ = 50 MPa at B, P = 25,000 N, h = 100 mm, and thickness equals 60 mm, find the corresponding value of a.

Figure 1