Mohr circle of inertia-product of inertia

[chandran]

I want to draw the mohr circle for inertia about some coordinate. I know
moment of inertia about x,y coordinateas IX AND IY. Theory says that
product of inertia is required. What is this product of inertia and what is its
physical significance?

 

[Andrew Mason]

I want to draw the mohr circle for inertia about some coordinate. I know
moment of inertia about x,y coordinateas IX AND IY. Theory says that
product of inertia is required. What is this product of inertia and what is its
physical significance?

To avoid the blind leading the blind I will defer to the following sites which I think you will find very useful:

http://kwon3d.com/theory/moi/prin.html
http://isb.ri.ccf.org/biomch-l/archives/biomch-l-2002-02/00020.html

I found this excellent site that has a series of animations that will take you step by step through it.
http://www.engin.umich.edu/students/support/mepo/ELRC/me211/flash2/coach_inertia_00.swf

Hope that helps.

AM