Collapse of Carbon-Glass Composite Circular Cylinders under Uniform External Pressure

2009 ◽  
Author(s):  
P.T. Smith ◽  
C.T.F. Ross ◽  
A.P.F. Little
Keyword(s):  
External Pressure ◽  
Circular Cylinders ◽  
Glass Composite ◽  
Uniform External Pressure

scholarly journals Nonlinear Buckling Characteristics of Ring-stiffened Circular Cylinders under Uniform External Pressure

2012 ◽  
Vol 26 (2) ◽  
pp. 79-84
Author(s):  
Dang Ahn ◽  
Soo-Young Kim ◽  
Sung-Chul Shin ◽  
Bo-Young Chung ◽  
Youn-Hoe Koo
Keyword(s):  
External Pressure ◽  
Circular Cylinders ◽  
Nonlinear Buckling ◽  
Uniform External Pressure

General Instability of Swedge-Stiffened Circular Cylinders Under Uniform External Pressure

1993 ◽  
Vol 37 (01) ◽  
pp. 77-85
Author(s):  
C. T. F. Ross ◽  
A. Palmer
Keyword(s):  
Finite Element Method ◽  
Experimental Investigation ◽  
Finite Element ◽  
Theoretical Analysis ◽  
External Pressure ◽  
Reduction Factor ◽  
Circular Cylinders ◽  
The Finite Element Method ◽  
Uniform External Pressure ◽  
Thinness Ratio

A theoretical and experimental investigation into the general instability of nine swedge-stiffened circularcylinders under uniform external pressure is described. The investigation found that most of the vesselssuffered plastic general instability, and that initial out-of-roundness played a significant role in the magnitude of the elastic knockdown. The theoretical analysis was based on the finite-element method, and a thinness ratio is proposed from which one can determine a plastic reduction factor when more experimental results are available.

Inelastic Shell Instability of Geometrically Imperfect Aluminum Alloy Circular Cylinders under Uniform External Pressure

2008 ◽  
Vol 45 (03) ◽  
pp. 175-181
Author(s):  
Carl T. F. Ross ◽  
Andrew P. F. Little ◽  
Graham Brown ◽  
Aravinthan Nagappan
Keyword(s):  
Aluminum Alloy ◽  
Hydrostatic Pressure ◽  
Analytical Solution ◽  
Structural Design ◽  
External Pressure ◽  
Circular Cylinders ◽  
External Hydrostatic Pressure ◽  
Element Analysis ◽  
Uniform External Pressure ◽  
Design Chart

The paper presents new experimental results on the collapse of unstiffened aluminum alloy circular cylinders suffering elastic and plastic nonsymmetric bifurcation buckling under external hydrostatic pressure. These results complement the results given in two previous Marine Technology papers written by the senior author, which were intended for the structural design of near-perfect unstiffened and ring-stiffened circular conical shells under external hydrostatic pressure. The present paper presents a structural design chart for geometrically imperfect circular cylinders under uniform external pressure, which is more likely to be used than the design charts for the previous near-perfect vessels because it represents the more "usual" case. In addition to an experimental analysis, theoretical analyses were also carried out. An analytical solution by von Mises was used, together with a finite element analysis solution, using the Shell 93 element of the ANSYS computer package. Comparison between ANSYS and the analytical solution was reasonable. A design chart is provided, which looks like it could be quite useful for practical purposes.

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