Using Moments of Inertia and Stress to Determine Maximum Load on a Beam

AI Thread Summary
The discussion focuses on the use of Mass Moment of Inertia versus Area Moment of Inertia in determining maximum stress on a beam. The original poster seeks clarification on how to calculate stress when only Mass Moment of Inertia data is available. They emphasize that typically, Area Moment of Inertia is used for beam analysis but are unsure how to apply the Mass Moment of Inertia in their specific case. The main question posed is about determining the maximum load that can be applied to prevent beam failure. The conversation encourages sharing examples and further discussion on the topic.
ricky_fusion
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Hi..

Is there anyone 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"

http://en.wikipedia.org/wiki/List_of_area_moments_of_inertia"

As I knows, the stress formula is :
MaxStress.jpg


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.

Thanks for your helps guys.. :biggrin:
 
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Hi ricky_fusion! :wink:
ricky_fusion said:
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.

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? :smile:
 
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Uupss...
Sorry I forgot to put put the question. :biggrin:
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 :
https://www.physicsforums.com/newreply.php?do=newreply&noquote=1&p=2206127"

Thanxs to reply guys.

Ricky
 
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