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Consider a point in a structural member that is subjected to plane stress. Normal and shear stress magnitudes acting on horizontal and vertical planes at the point are Sx = 22.6 ksi, Sy = 7.0 ksi, and Sxy = 24.3 ksi. (a) Determine the principal stresses and the maximum in-plane shear stress acting at the point. (b) On a piece of paper, show these stresses on an appropriate sketch (e.g., see Figure 12.15 or Figure 12.16). For the sketch, calculate @p, the angle between the x axis and the principal stress orientation. Also, calculate Oavg, the normal stress on planes of maximum in-plane shear stress. (c) Compute the absolute maximum shear stress at the point. S Sx S, Answers: (a) Opi = i ksi p2 = i ksi Tmax = i ksi i o (b) 0 = Oavg = i ksi (c) tabs max = i ksi