Axially loaded fustra
Axially loaded fustra
(OP)
I would like to calculate the potential loading effect on a thin walled frusta (truncated conical shell)i.e. deflection maximum stress etc
I have found an equation in "Roarks Formulas" but the results I'm getting are unbelievable.
Can anybody help?
I have found an equation in "Roarks Formulas" but the results I'm getting are unbelievable.
Can anybody help?






RE: Axially loaded fustra
Many young engineers are not taught classical theories but can develop a good skill in the understanding of a complex structure through testing it with computer software.
RE: Axially loaded fustra
Formulas for
Stress, Strain and Structural Matrices
Walter D. Pilkey
Wiley Interscience
Chapter 20
You may find also something in
Stresses in Plates and Shells 2nd edition
Ansel C. Ugural
Mc Graw Hill
Chapter 12
Estructuras Laminares
J. Courbon
Editores Técnicos Asociados S.A.
Barcelona 1981
=
Voiles Minces
J. Courbon
Eyrolles
Paris
Laminas de Hormigón
A. M. Haas
ietcc
Madrid
Capítulo 3
=
Thin Concrete Shells
John Wiley & Sons
New York, London
Don't fail to ask google in a variegated number of ways, plus of course make FEM models.
RE: Axially loaded fustra
Roark has formulae for conical shells subject to end loads: these give rise to local bending effects that of course exist, but might be unimportant in your situation.
If you have internal pressure only the calculation is quite simple: use the formula for a cylinder where the radius is the local curvature radius (normal to wall) of the cone.
prex
http://www.xcalcs.com
Online tools for structural design
RE: Axially loaded fustra
Hope this helps.
RE: Axially loaded fustra
I have a 4.5m base diameter, 5 Degree angle at the base of the cone and a 1.6m top diameter. The base of the shell is welded to a cylinder and the top will have a flange welded. This will support some metal work totaling 2.5 Tonnes.
My experience tells me that there should be no problems with this but "Assumptions" lead to larger problems. I therefore have been trying to calculate the reaction of the cone to the loading to professionaly address this issue in my design.
RE: Axially loaded fustra
BS5500 and EN13445, but also ASME VIII, have methods for checking the stability of cylindrical walls.
prex
http://www.xcalcs.com
Online tools for structural design