Section A3.10 example 3 SECTION A3.10 EXAMPLE 3
For the skin-stringer cross section shown, determine the

  • (a) moment of inertia about the centroidal x axis
  • (b) moment of inertia about the centroidal y axis
  • (c) product of inertia

    EQUATIONS USED

    SOLUTION

    With respect to stiffener 'A', the centroid is located at

    The rectangular moments and product of inertia are:

    Because the cross section is not symmetrical about the x or the y axis, the product of inertia is not zero.

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