Viewing the Bending Stress

  1. Right-click the Results folder and select Define Stress Plot .
  2. In the PropertyManager, under Display:
    1. Select psi for Units .
    2. Select Upper bound bending in DIR 2 for Beam stress.
      You create a plot of bending stress in direction 2 because the moments act around direction 2 of the rectangular cross-section.
  3. Click .
  4. To compare to the theoretical solution:
    The maximum stress equals Mmax * y / I

    where:

    • Mmax = 33841 lb-in

      (determined by listing the beam forces)

    • y = 1.5 in

      (one half of the height of the rectangular cross-section)

    • I = 2.25 in^4

      (1/12 * width of rectangular cross-section * height of rectangular cross-section^3)

    This calculates to 22560.67 psi, which closely matches the maximum bending stress shown in the plot above.

    Reference:

    Shames, Irving H., Introduction to Solid Mechanics, Prentice Hall, 2nd edition, pp 261-264, 1989.

Congratulations! You have completed this lesson.