The deflection at the middle of the shelf is not a problem, it also must get some support from the edges.
Think you are correct the I value will change due to the other axis deflecting. I have checked this and it will change as below.
I = 18654.4 mm^4 at start ---- now; I = 11300 mm^4 with...
The image in post 3 shows the pin type supports. The section is constant throughout as in the image below, only their is a fold over the two ends as seen in post 3. Shelf size 1000mm x 300mm.
"does the shelf act like a beam, or something else?" - am trying to determine this. Think the shelf...
We have measured a deflection of 10mm (at centre of shelf) at a UDL load of 160 KG. The calculation should therefore provide the same result, it does not.
Think it may be something due to the thickness less than 1mm and the folds on the outer edges.
Their must be a different formula for this...
Thanks for your reply jack action. I have used the method above to calculate the maximum load but the results are incorrect.
Example: Shelf size 1000mm x 300mm.
Taking a cut through the shelf and using inventor to calculate the Second Moment of Area, (I = 18654.4 mm^4) - this value is...
How can I calculate the maximum load a shelf made from sheet metal can take at a certain deflection limit? Have a number of different sizes and gauges and need to calculate without testing.
Any help is much appreciated.
The shelf is supported in the 4 corners similar to photo below...