Combine Products of Inertia using Superposition

[StewB]

I have two bodies which combine to form a system. For each body, I know its centroidal products of inertia. I wish to combine the two centroidal products of inertia to arrive at the products of inertia about the centroid of the system.

Any help is greatly appreciated!

 

[A.T.]

I have two bodies which combine to form a system. For each body, I know its centroidal products of inertia. I wish to combine the two centroidal products of inertia to arrive at the products of inertia about the centroid of the system.

Any help is greatly appreciated!

https://en.wikipedia.org/wiki/Parallel_axis_theorem