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# Maximum deflection aluminium

## Maximum deflection aluminium

(OP)
Hi,

I have a quadratic plate where the edges are fixed. I have a distributed load of 25000 N over the entire plate which is made of aluminium. How can I calculate the deflection of the plate?

Thank you

### RE: Maximum deflection aluminium

If by 'quadratic', you mean 'rectangular', the necessary equations should be found in many sophomore engineering textbooks, in any number of online calculators dealing with plates, in Roark's Formulas for Stress and Strain, and even in Machinery's Handbook.

If you mean something else, please so state, and elucidate. Thank you.

Mike Halloran
Pembroke Pines, FL, USA

### RE: Maximum deflection aluminium

(OP)
Thank you, I have found equations in Roarks with rectangular plate with uniform distributed load and clamped along all edges. My deflection is larger than half the thickness so thin plate theory (as Roarks) does not apply. I need equations for large deflection theory. Any idea how to solve it?

### RE: Maximum deflection aluminium

Are the edges truly fixed, preventing any inward contraction of the plate ?

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