In order to study the compressive behavior of flexible pipes, a nonlinear finite element model was developed. This fully tridimensional model recreates a five-layer flexible pipe with two tensile armor layers, an external polymeric sheath, an orthotropic high strength tape, and a rigid inner nucleus. The friction coefficient is known as a key parameter in determining the instability response of flexible pipes’ tensile armor. Since the featured model includes all nonlinear frictional contacts between the layers, it has been used to conduct several experiments in order to investigate its influence on the response. This article includes a description of the finite element model itself and a case study where the friction between the layers of the pipe is changed. The procedure of this analysis is described here, along with the results.

References

References
1.
Braga
,
M. P.
, and
Kaleff
,
P.
,
2004
, “
Flexible Pipe Sensitivity to Birdcaging and Armor Wire Lateral Buckling
,”
Proceedings of the 23rd International Conference on Offshore Mechanics and Arctic Engineering
,
Vancouver, Canada
.
2.
Custodio
,
A. B.
,
Lemos
,
C. A.
,
Troina
,
L. M.
, and
Almeida
,
M. C.
,
2007
, “
Recent Researches on the Instability of Flexible Pipe’s Armours
,”
Proceedings of the 17th International Offshore and Polar Engineering Conference
,
Lisbon, Portugal
.
3.
Troina
,
L. M. B.
,
Mourelle
,
M. M.
,
Brack
,
M.
,
Sousa
,
J. R.
, and
Siqueira
,
M. Q.
,
2002
, “
A Strategy for Flexible Risers Analysis Focused on Compressive Failure Mode
,”
Proceedings of the 14th Deep Offshore Technology
,
New Orleans, LA
.
4.
Brack
,
M.
,
Troina
,
L. M. B.
, and
Sousa
,
J. R. M.
,
2005
, “
Flexible Riser Resistance Against Combined Axial Compression, Bending and Torsion in Ultra-Deep Water Depths
,”
Proceedings of the 24th International Conference on Ocean, Offshore and Arctic Engineering
,
Halkidiki, Greece
.
5.
Perdizet
,
T.
,
Leroy
,
J. M.
,
Barbin
,
N.
,
Le-Corre
,
V.
,
Charliac
,
D.
, and
Estrier
,
P.
,
2011
, “
Stresses in Armour Layers of Flexible Pipes: Comparison of Abaqus Models
,”
2011 SIMULIA Customer Conference
,
Barcelona, Spain
.
6.
Sertã
,
O.
,
Fumis
,
R.
,
Connaire
,
A.
,
Smith
,
J.
,
Tanaka
,
R.
,
Barbosa
,
T.
, and
Godinho
,
C.
,
2012
, “
Predictions of Armour Wire Buckling for a Flexible Pipe Under Compression, Bending and External Pressure Loading
,”
Proceedings of the 31st International Conference on Ocean, Offshore and Arctic Engineering
,
Rio de Janeiro, Brazil
.
7.
Connaire
,
A.
,
Smith
,
J.
,
Nestor
,
R.
,
Tanaka
,
R.
, and
Albuquerque
,
E.
,
2013
, “
Validation of Solid Modelling and Analysis Techniques for Response Prediction of Deepwater Flexible Pipe
,”
Proceedings of the 32nd International Conference on Ocean, Offshore and Arctic Engineering
,
Nantes, France
.
8.
Vaz
,
M. A.
, and
Rizzo
,
N. A. S.
,
2011
, “
A Finite Element Model for Flexible Pipe Armor Wire Instability
,”
J. Mar. Struct.
,
24
(
3
), pp.
275
291
.
9.
Sousa
,
J. M.
,
Viero
,
P. F.
,
Magluta
,
C.
, and
Roitman
,
N.
, “
An Experimental and Numerical Study on the Axial Compression Response of Flexible Pipes
,”
ASME J. Offshore Mech. Arct. Eng.
,
134
(
3
), p.
031703
.
10.
Malta
,
E. R.
, and
Martins
,
C. A.
,
2014
, “
Finite Element Analysis of Flexible Pipes Under Compression
,”
Proceedings of the ASME 33rd International Conference on Ocean, Offshore and Arctic Engineering
,
San Francisco, CA
.
11.
Malta
,
E. R.
, and
Martins
,
C. A.
,
2016
, “
Finite Element Analysis of Flexible Pipes Under Compression: Influence of the Sample Length
,”
ASME J. Offshore Mech. Arct. Eng.
,
139
(
1
), p.
011701
.
12.
Burgoyne
,
C. J.
, and
Brown
,
I. F.
,
1997
, “
Transverse Properties of Bulk Aramid Fibers
,”
3rd International Symposium on Non-Metallic (FRP) Reinforcement for Concrete Structures (FRPRCS-3)
,
Sapporo, Japan
.
13.
Zhu
,
D.
,
Mobasher
,
B.
, and
Rajan
,
S. D.
, “
Dynamic Tensile Testing of Kevlar 49 Fabrics
,”
J. Mater. Civil Eng.
,
23
(
3
), pp.
230
239
.
You do not currently have access to this content.