This paper presents the experimental result on the response and stability of thin-walled tubes subjected to cyclic bending with different curvature-rates. The curvature-ovalization measurement apparatus, designed by Pan et al. (1998), was used for conducting the present curvature-controlled experiments on thin-walled tubular specimens of 304 stainless steel. It is observed that the higher the applied curvature-rate, the greater is the degree of hardening of metal tube. However, the ovalization of tube cross-section increases when the applied curvature-rate increases. Furthermore, due to the higher degree of the ovalization of tube cross-section for higher curvature-rates under cyclic bending, the number of cycles to produce buckling is correspondingly reduced.

1.
Ades
C. S.
,
1957
, “
Bending Strength of Tubing in the Plastic Range
,”
J. Aerosol. Sci.
, Vol.
24
, pp.
605
610
.
2.
Brazier
L. G.
,
1927
, “
On the Flexure of Thin Cylindrical Shells and Other Thin Section
,”
Proceedings of the Royal Society
, London, Series A, Vol.
116
, pp.
104
114
.
3.
Corona
E.
, and
Kyriakides
S.
,
1988
, “
On the Collapse of Inelastic Tubes Under Combined Bending and Pressure
,”
Int. J. Solids Struct.
, Vol.
24
(
5
), pp.
505
535
.
4.
Corona
E.
, and
Vaze
S.
,
1996
, “
Buckling of Elastic-Plastic Square Tubes under Bending
,”
Int. J. Mech. Sci.
, Vol.
38
(
7
), pp.
753
775
.
5.
Fabian
O.
,
1977
, “
Collapse of Cylindrical, Elastic Tube Under Combined Bending, Pressure and Axial Loads
,”
Int. J. Solids Struct.
, Vol.
13
, pp.
1257
1270
.
6.
Gellin
S.
,
1980
, “
The Plastic Buckling of Long Cylindrical Shell under pure Bending
,”
Int. J. Solids Struct.
, Vol.
16
, pp.
397
407
.
7.
Ikegami, K., and Ni-Itsu, Y., 1983, “Experimental Evaluation of the Interaction Effect between Plastic and Creep Deformation,” Plasticity Today Symposium, Udine, Italy, June, pp. 27–30.
8.
Krempl
E.
,
1979
, “
An Experimental Study of Room-Temperature Rate-Sensitivity, Creep and Relaxation of AISI Type 304 Stainless Steel
,”
J. Mech. Phy. Solids
, Vol.
27
, pp.
363
375
.
9.
Kujawski
D.
, and
Krempl
E.
,
1981
, “
The Rate (Time)-Dependent Behavior of Ti-7Al-2Cb-1Ta Titanium Alloy at Room Temperature under Quasi-Static Monotonic and Cyclic Loading
,”
ASME JOURNAL OF APPLIED MECHANICS
, Vol.
48
, pp.
55
63
.
10.
Kyriakides
S.
, and
Ju
G. T.
,
1992
, “
Bifurcation and Localization Instabilities in Cylindrical Shells under Bending—I. Experiments
,”
Int. J. Solids Struct.
, Vol.
29
(
9
), pp.
1117
1142
.
11.
Kyriakides
S.
, and
Shaw
P. K.
,
1982
, “
Response and Stability of Elastoplastic Circular Pipes under Combined Bending and External Pressure
,”
Int. J. Solids Struct.
, Vol.
18
(
11
), pp.
957
973
.
12.
Kyriakides
S.
, and
Shaw
P. K.
,
1987
, “
Inelastic Buckling of Tubes under Cyclic Loads
,”
ASME Journal of Pressure Vessel Technology
, Vol.
109
, pp.
169
178
.
13.
Pan
W. F.
,
Wang
T. R.
, and
Hsu
C. M.
,
1998
, “
A Curvature-Ovalization Measurement Apparatus for Circular Tubes under Cyclic Bending
,”
Experimental Mechanics
, Vol.
38
(
2
), pp.
99
102
.
14.
Reddy
B. D.
,
1979
, “
An Experimental Study of the Plastic Buckling of Circular Cylinders in Pure Bending
,”
Int. J. Solids Struct.
, Vol.
15
, pp.
669
683
.
15.
Reissner
E.
,
1961
, “
On Finite Pure Bending of Cylindrical Tubes
,”
Oesteer. Ing. Arch.
, Vol.
15
, pp.
165
172
.
16.
Reissner
E.
, and
Weinitschke
H. J.
,
1963
, “
Finite Pure Bending of Cylindrical Tubes
,”
Q. Appl. Math.
, Vol.
20
, pp.
305
319
.
17.
Shaw
P. K.
, and
Kyriakides
S.
,
1985
, “
Inelastic Analysis of Thin-Walled Tubes under Cyclic Bending
,”
Int. J. Solids Struct.
, Vol.
21
(
11
), pp.
1073
1100
.
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