Consider a point in a structural member that is subjected to plane stress. Normal and shear stresses acting on horizontal and vertical planes at the point are shown in Figures P12.56. (a) Determine...

Consider a point in a structural member that is subjected to plane stress. Normal and shear stresses acting on horizontal and vertical planes at the point are shown in Figures P12.56.

(a) Determine the principal stresses and the maximum in-plane shear stress acting at the point.

(b) Show these stresses in an appropriate sketch.

(c) Compute the absolute maximum shear stress at the point.