Hollow Metal disc loading - the needed thickness of the disc?

AI Thread Summary
To determine the necessary thickness of a hollow metal disc with an outer diameter of 10 cm and an inner diameter of 5 cm to support a 1 kg load, one must consider the disc's material properties and the stress distribution. The load is uniformly spread over the disc's area, and the disc is supported by three bars along its perimeter. Calculations should reference Roark's Formulas for Stress and Strain, particularly Chapter 11, which provides relevant formulas for stress analysis in circular plates. The user seeks guidance on performing these calculations rather than a direct solution. Understanding the material's yield strength and applying appropriate formulas will yield the required thickness for safety and performance.
ambroa
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Hi,
how to calculate the limit of load you can place on the top of the circular plate with a quite big circular hole in it (OD 10 cm, ID 5 cm)? the question is how to calculate the thickness needed to bear 1 kg which is spread on the whole area (1 kg heavy object with the same shape as the plate, a hollow cylinder 10 cm x 5 cm x some height). The plate is in the air, supported by 3 bars on the ring of the plate.
thank you for any help/advice! This is not a homework, I don't want to "get the solution" but be able to compute it for material I'd use than.

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Roark's Formulas for Stress and Strain Chapter 11 has this.
 

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