9. A beam problem under the pure bending moment is solved using CST finite elements, as shown in the figure. Assume E = 200 GPa and v = 0.3. The thickness of the beam is 0.01 m. To simu¬

late the pure bending moment, two opposite forces F = ±100,000 N are applied at the end of the beam. Using any available finite element program, calculate the stresses in the beam along the neutral axis and top and bottom surfaces. Compare the numerical results with the elemen¬

tary theory of beam. Provide an element stress contour plot for crxv.