# Moment of inertia and Stress

1. May 19, 2009

### ricky_fusion

Hi..

Is there any one can explain to me or give a link that explains about condition of using Mass Moment of inertia or Area moment of inertia to Maximum Stress??

http://en.wikipedia.org/wiki/Mass_moment_of_inertia" [Broken]

http://en.wikipedia.org/wiki/List_of_area_moments_of_inertia" [Broken]

As I knows, the stress formula is :

As I knows, generally, I analysis a structure of Beam, etc, I used Area Moment of Inertia. But, I have a case which the knowing data is Mass moment of Inertia.

Last edited by a moderator: May 4, 2017
2. May 20, 2009

### tiny-tim

Hi ricky_fusion!
moment of force = Stress times https://www.physicsforums.com/library.php?do=view_item&itemid=185" per displacement

moment of force = angular acceleration times mass moment

I don't understand how you can find the stress from the Mass moment of Inertia ("ordinary" https://www.physicsforums.com/library.php?do=view_item&itemid=31") …

can you show us this case in which the given data is mass moment?

Last edited by a moderator: Apr 24, 2017
3. May 20, 2009

### ricky_fusion

Last edited by a moderator: Apr 24, 2017
4. May 20, 2009

### tiny-tim

Last edited by a moderator: Apr 24, 2017
5. May 21, 2009

### ricky_fusion

Uupss......
Sorry I forgot to put put the question.
The question is :
How much the maximum load should be put, so the beam is not broken?

Btw,
Let's continued discussed this thread in here :