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I am trying to determine the calculation to use to determine the force at which a disk plate will fail for the following set up.

The disk is slid onto a metal bung for a roll, the disk is supported from the inside diameter for around 50mm. A force is then applied on the oppsite side of the support uniformly to the entire face of the disk. Please see image below for clarity. The blue part is the disk and the red is the bung.

Plate.bmp

Just wondering what equation I should be using to determine the force to which the disk will fail assuming I know the properties of the disk.

Any help would be much appreciated, I hope the explanation is in enough detail. I did attempt the problem by treating a section of the disk as a rectangle and analysing that way. Not sure if it was the right way to go about it, I used the bending stress equation to work out the force needed to fail the material.

For some reason the attachment wont upload, I did create the same thread in another part of the forum but thought I would find more answers here. The link to the other thread is https://www.physicsforums.com/showthread.php?t=560325

Thanks

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# Stress calculations on a disk plate

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