Eighteen mild steel cylinders with the length-to-radius ratio, L/R ≈ 2.4 and with the radius-to-wall thickness ratio, R/t ≈ 185 were collapsed by axial compression. Cylinders had variable length at one end of sinusoidal profile. The magnitude of axial imperfection-to-wall thickness ratio, 2A/t, was varied between 0.05 and 1.0. Experimental results show that buckling strength strongly depends on the axial amplitude of imperfection. On average imperfect cylinders, with 2A/t = 1.0, are able to support 49% of experimental buckling load obtained for geometrically perfect model. The largest sensitivity of buckling strength was associated with small amplitude of imperfection in axial length. For example, for axial length imperfection amounting to 25% of wall thickness the buckling strength was reduced by 40%. It appears that the number of sinusoidal waves in the imperfection profile plays a secondary role, i.e., its role in reducing the buckling strength is not a dominant factor. The paper provides experimental details and comparisons with numerical results.

References

References
1.
Albus
,
J.
,
Gomez-Garcia
,
J.
, and
Ory
,
H.
,
2001
, “
Control of Assembly Induced Stresses and Deformations Due to Waviness of the Interface Flanges of the ESC-A Upper Stage
,”
Proceedings of 52nd International Astronautical Congress
,
Toulouse
, pp.
1
9
.
2.
Libai
,
A.
, and
Durban
,
D.
,
1977
, “
Buckling of Cylindrical Shells Subjected to Nonuniform Axial Loads,
ASME J. Appl. Mech.
,
44
, pp.
714
720
.10.1115/1.3424162
3.
Guggenberger
,
W.
,
1991
, “
Buckling of Cylindrical Shells Under Local Axial Loads
,”
Buckling of Shell Structures, on Land, in the Sea and in the Air
,
J. F.
Jullien
,
ed.
,
Elsevier Applied Science
,
London
, pp.
323
333
.
4.
Guggenberger
,
W.
,
Greiner
,
R.
, and
Rotter
,
J. M.
,
2000
, “
The Behaviour of Locally-Supported Cylindrical Shells: Unstiffened Shells
,”
J. Constr. Steel
,
56
, pp.
175
197
.10.1016/S0143-974X(99)00102-9
5.
Krasovsky
,
V.
,
1993
, “
Nonlinear Effects in the Behaviour of Cylindrical Shells Under Nonuniform Axial Compression, Experimental Results
,”
Proceedings of the 2nd International Conference on Nonlinear Mechanics,” Aug. 23–26
,
Beijing
, pp.
245
248
.
6.
Teng
,
J. G.
, and
Rotter
,
J. M.
,
1992
, “
Linear Bifurcation of Perfect Column-Supported Cylinders: Support Modelling and Boundary Conditions
,”
Thin-Walled Struct.
,
14
, pp.
241
263
.10.1016/0263-8231(92)90017-Q
7.
Ory
,
H.
, and
Reimerdes
,
H. G.
,
1987
, “
Stresses in and Stability of Thin Walled Shells Under Non-Ideal Load Distribution
,”
Stability of Plate and Shell Structures
,
P.
Dubas
,
P.
, and
D.
Vandepitte
, eds.,
Ghent University
,
Belgium
, pp.
555
560
.
8.
Kamyab
,
H.
, and
Palmer
,
S. C.
,
1991
, “
Displacements in Oil Storage Tanks Caused by Localised Differential Settlement
,”
ASME J. Pressure Vessel Technol.
,
113
, pp.
71
80
.10.1115/1.2928730
9.
Lancaster
,
E. R.
,
Calladine
,
C. R.
, and
Palmer
,
S. C.
,
2000
, “
Paradoxical Buckling Behaviour of a Cylindrical Shell Under Axial Compression
,”
Int. J. Mech. Sci.
,
42
, pp.
843
865
.10.1016/S0020-7403(99)00030-2
10.
Błachut
,
J.
,
2010
, “
Buckling of Axially Compressed Cylinders With Imperfect Length
,”
Comput. Struct.
,
88
, pp.
365
374
.10.1016/j.compstruc.2009.11.010
11.
Galletly
,
G. D.
, and
Błachut
,
J.
,
1990
, “
Axially Compressed Cylindrical Shells—A Comparison of Experiment and Theory
,”
Inelastic Solids and Structures
,
M.
Kleiber
and
J. A.
König
, eds.,
Pineridge Press
,
Swansea
, pp.
257
276
.
12.
Bushnell
,
D.
,
1976
, “
Bosor5: Program for Buckling of Elastic-Plastic Complex Shells of Revolution Including Large Deflections and Creep
,”
Comput. Struct.
,
6
, pp.
221
239
.10.1016/0045-7949(76)90034-1
13.
Hibbitt, Karlsson
, and
Sorensen
,
ABAQUS—Theory and Standard User's Manual Version 6.3
,
2006
, Pawtucket, RI,
02860
4847
.
14.
Ifayefunmi
,
O.
,
2011
, “
Combined Stability of Conical Shells
,” Ph.D. thesis,
The University of Liverpool
,
Liverpool, UK
.
You do not currently have access to this content.