Moment of Inertia

What is then the physical significance of the product of inertia which relates to a set of axis XX and YY defined as Ixy= integral(XYdA)??

 

[prex]

It enters into the formulae for transposing the moments of inertia between different sets of reference axes.
Also if XX (or YY) is an axis of symmetry for the section, then I_xy=0 , but the inverse statement is not necessarily true. prex

http://www.xcalcs.com

Online tools for structural design

 

Can you please tell me(kind request) what you exactly mean when you say "transposing the moments of inertia between different sets of reference axes."

 

[mloew]

Krityt,

I suggest looking at the following web page for a decent explanation:

http://isb.ri.ccf.org/biomch-l/archives/biomch-l-2002-02/00020.html

I got this from conducting a Google search on "Ixy product of inertia"

http://www.google.com/search?sourceid=navclient&q=+Ixy+product+of+inertia

Best regards,

Matthew Ian Loew