Bending Stresses in Flat Plates using Roark's Formulas
Bending Stresses in Flat Plates using Roark's Formulas
(OP)
I am using Roark's 6th Ed for a flat plate with straight boudaries. I tried one case in Table 26 Case 8.b which is fixed on all four edges and has a uniform load over a concentric circle.
My question is why are the max bending stresses are not shown? The article for this table says that max stresses are included when available and critical cases otherwise. Max stresses are given for this load case with simply supported edges.
Thanks.
My question is why are the max bending stresses are not shown? The article for this table says that max stresses are included when available and critical cases otherwise. Max stresses are given for this load case with simply supported edges.
Thanks.






RE: Bending Stresses in Flat Plates using Roark's Formulas
RE: Bending Stresses in Flat Plates using Roark's Formulas
Chris
"In this house, we obey the laws of thermodynamics." Homer Simpson
RE: Bending Stresses in Flat Plates using Roark's Formulas
RE: Bending Stresses in Flat Plates using Roark's Formulas
I did not explain myself well. For this case two stresses are given. The larger of the two is along the edge (which is where I think the max should be) and the other (lower)stress is at the center.
Is the formula for the stress along the edge actually the maximum eventhough the formula does not specifically state max? If is not, why are these formulas given (critical values?) instead of the maximum values.
RE: Bending Stresses in Flat Plates using Roark's Formulas
I've found that while Roark is a pretty good reference, you can't beat going to the source material. In this case, it's Timoshenko, "Theory of Plates and Shells."
RE: Bending Stresses in Flat Plates using Roark's Formulas
RE: Bending Stresses in Flat Plates using Roark's Formulas