Beer & Johnston — Pure Bending: Problem 4.149

4.149 Knowing that the 120-kN load may be applied at any point on the circumference of the 40-mm-radius circle shown, determine (a) the value of \(\theta\) for which the stress at \(D\) reaches its largest value, (b) the corresponding stress at \(A\), \(B\), and \(D\).