![]() ![]() In a real situation theĪs expected, the product of inertia is zero because of symmetry. ![]() The error in Ix is 5.9% and that in Iy is 0.5%. Now by just using the second component in the parallel axis theorem, we get With respect to the bottom left stringer, the centroid is located at To demonstrate this, the moment of inertia will be found using the completeįound by ignoring the first component of the parallel axis theorem. The second moment of area, also known as moment of inertia of plane area, area moment of inertia, polar moment of area or second area moment, is a geometrical. This is because the first component in the parallel axis theorem, inĬomparison to the second, is very small in such configurations. ![]() Often the actual moments of inertia for the individual lumped areas are not Unless otherwise stated, the moment of inertia of the skin can safely be ignored, this leaves only the moment of inertia due to the lumped areas.
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