Pipelines can be subjected to bending loads due to a variety of factors such as seismic activity, slope instability, or discontinuous permafrost. Experimental studies of Sen et al. [1–3] showed that pipelines can fail under bending loads due to pipe body tension side fracture which is a mostly overlooked failure mode in pipelines. Recent numerical studies on the structural behavior of cold bent pipes [4–6] also confirmed the likelihood of the pipe body tension side fracture. Furthermore, it was shown that both the material properties and the level of internal pressure can have a considerable effect on the failure mode of the pipe. In this current work, the parametric studies of internal pressure and material properties are extended to straight pipes using finite-element analysis. The differences in the structural behavior due to using stress–strain curves from test specimens in longitudinal and circumferential direction of the pipe are demonstrated. Using failure criteria based on the equivalent plastic strain, different failure modes corresponding to different levels of internal pressure and yield strength are shown on straight pipes.

References

References
1.
Sen
,
M.
,
2006
, “
Behaviour of Cold Bend Pipes Under Combined Loads
,” Ph.D. dissertation, University of Alberta, Edmonton, AB, Canada.
2.
Sen
,
M.
,
Cheng
,
J.
, and
Zhou
,
J.
,
2010
, “
Behavior of Cold Bend Pipes Under Bending Loads
,”
J. Struct. Eng.
,
137
(
5
), pp.
571
578
.
3.
Sen
,
M.
,
Cheng
,
J.
, and
Murray
,
D.
,
2004
, “
Full-Scale Tests of Cold Bend Pipes
,”
ASME
Paper No. IPC2004-0743.
4.
Cakiroglu
,
C.
,
Komeili
,
A.
, and
Adeeb
,
S.
,
2012
, “
Numerical Analysis of High Pressure Cold Bend Pipe to Investigate the Behaviour of Tension Side Fracture
,”
ASME
Paper No. IPC2012-90381.
5.
Cakiroglu
,
C.
,
Adeeb
,
S.
, and
Cheng
,
J.
,
2014
, “
Numerical Analysis of Pressurized Cold Bend Pipes Under Bending to Investigate the Transition From Compression to Tension Side Failures
,”
Structures Congress 2014
, pp.
1990
2001
.
6.
Cakiroglu
,
C.
,
Kainat
,
M.
, and
Adeeb
,
S.
,
2014
, “
Evaluation of Pressurized Cold Bend Pipe Body Tensile Fractures Under Bending Loads
,”
ASME
Paper No. IPC2014-33582.
7.
Fatemi
,
A.
,
Kenny
,
S.
, and
Sen
,
M.
,
2008
, “
Investigations on the Local Buckling Response of High Strength Linepipe
,”
ASME
Paper No. IPC2008-64407.
8.
Fatemi
,
A.
,
Kenny
,
S.
, and
Sen
,
M.
,
2009
, “
Parameters Affecting the Buckling and Post-Buckling Behaviour of High Strength Pipelines
,”
ASME
Paper No. OMAE2009-79578.
9.
Fatemi
,
A.
,
Kenny
,
S.
, and
Taheri
,
F.
,
2010
, “
End Boundary Effects on Local Buckling Response of High Strength Linepipe
,”
ASME
Paper No. IPC2010-31397.
10.
Zimmerman
,
T.
,
Timms
,
C.
, and
Xie
,
J.
,
2004
, “
Buckling Resistance of Large Diameter Spiral Welded Linepipe
,”
ASME
Paper No. IPC2004-0364.
11.
Suzuki
,
N.
,
Arakawa
,
T.
, and
Arabey
,
A.
,
2014
, “
Strain-Based Pipeline Design in Harsh Environments Using Large Diameter High Strain Line Pipes
,”
ASME
Paper No. IPC2014-33421.
12.
Mitsuya
,
M.
,
Sakanoue
,
T.
, and
Motohashi
,
H.
,
2013
, “
Beam-Mode Buckling of Buried Pipeline Subjected to Seismic Ground Motion
,”
ASME J. Pressure Vessel Technol.
,
135
(
2
), p.
021801
.
13.
Neupane
,
S.
,
Adeeb
,
S.
, and
Cheng
,
R.
,
2012
, “
Modeling the Deformation Response of High Strength Steel Pipelines—Part I: Material Characterization to Model the Plastic Anisotropy
,”
ASME J. Appl. Mech.
,
79
(
5
), p.
051002
.
14.
API
2009
, “
Inspection Practices for Piping System Components, Downstream Segment
,” Americal Petroleum Institute, Washington, DC, Recommended Practice 574, 3rd ed.
15.
Yoshikawa
,
M.
,
Katoh
,
A.
, and
Sasaki
,
K.
,
2006
, “
A Failure Assessment Method for a Pipe Bend Subjected to Both a Bending Moment and Internal Pressure
,”
ASME J. Pressure Vessel Technol.
,
128
(
4
), pp.
605
617
.
16.
Kofiani
,
K.
,
Nonn
,
A.
, and
Wierzbicki
,
T.
,
2013
, “
New Calibration Method for High and Low Triaxiality and Validation on Sent Specimens of API X70
,”
Int. J. Pressure Vessels Piping
,
111–112
, pp.
187
201
.
17.
Neupane
,
S.
,
Adeeb
,
S.
, and
Cheng
,
R.
,
2012
, “
Modeling the Deformation Response of High Strength Steel Pipelines—Part II: Effects of Material Characterization on the Deformation Response of Pipes
,”
ASME J. Appl. Mech.
,
79
(
5
), p.
051003
.
You do not currently have access to this content.