Roark's Formulas for Stress and Strain
Roark's Formulas for Stress and Strain
(OP)
I need help interpreting a formula in Roark's book. On page 472, Table 26, case 11d, the formula for the maximum stress contains a variable "q".
My question is: For the triangular loading shown in the diagram, what is "q"? The total load on the plate? The maximum load at the base of the plate? Obviously, for a uniformly distributed load, "q" is simple. However, I can't seem to find any description in the book for what "q" is when the load is triangular, so I thought that someone out there with more experience might be able to help.
Thanks in advance.
My question is: For the triangular loading shown in the diagram, what is "q"? The total load on the plate? The maximum load at the base of the plate? Obviously, for a uniformly distributed load, "q" is simple. However, I can't seem to find any description in the book for what "q" is when the load is triangular, so I thought that someone out there with more experience might be able to help.
Thanks in advance.






RE: Roark's Formulas for Stress and Strain
I'm assuming your book has same table numbering and all as my Fifth Edition.
RE: Roark's Formulas for Stress and Strain
Table 24 defines it as the load per unit area.
The problem I always had with Roark's book was that in most cases where I used one of the formulas I did not have a method to verify the answer. So if I used an incorrect value for one of the coefficients I would not know it.
RE: Roark's Formulas for Stress and Strain
Look also in the site below, under Plates -> Simple bending -> Rectangular -> 2 adj.clamped,2 free -> Hydro load for the case that interests you.
prex
http://www.xcalcs.com
Online tools for structural design