1-20 of 24
Keywords: pipes
Close
Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Journal Articles
Article Type: Piper And Riser Technology
J. Offshore Mech. Arct. Eng. August 2012, 134(3): 031703.
Published Online: February 2, 2012
...José Renato M. de Sousa; Paula F. Viero; Carlos Magluta; Ney Roitman This paper deals with a nonlinear three-dimensional finite element (FE) model capable of predicting the mechanical response of flexible pipes subjected to axisymmetric loads focusing on their axial compression response. Moreover...
Journal Articles
Article Type: Piper And Riser Technology
J. Offshore Mech. Arct. Eng. August 2012, 134(3): 031701.
Published Online: February 1, 2012
...Alfredo Gay Neto; Clóvis de Arruda Martins When there is a failure on the external sheath of a flexible pipe, a high value of hydrostatic pressure is transferred to its internal plastic layer and consequently to its interlocked carcass, leading to the possibility of collapse. The design...
Journal Articles
Article Type: Ocean Engineering
J. Offshore Mech. Arct. Eng. November 2011, 133(4): 041101.
Published Online: April 7, 2011
...Bala Padmanabhan; R. Cengiz Ertekin It has been proposed that the warm surface-water intake pipes distributed around an OTEC plant can generate adequate momentum to globally position a platform to overcome the second-order drift forces, thereby eliminating the need for additional power...
Journal Articles
Article Type: Materials Technology
J. Offshore Mech. Arct. Eng. August 2011, 133(3): 031402.
Published Online: March 29, 2011
...Hugo A. Ernst; Richard E. Bravo This work studies the effect of the yield ( Y ) to tensile ( T ) ratio, Y ∕ T , on the structural integrity of line pipes with part through the thickness (PTT) circumferential defects subject to bend loading. A model based on elastic-plastic fracture mechanics...
Journal Articles
Article Type: Materials Technology
J. Offshore Mech. Arct. Eng. August 2011, 133(3): 031401.
Published Online: March 4, 2011
... materials studied, different cases with different Y ∕ T values were considered. Even for the lower limits of experimental data, i.e., larger Y ∕ T , the materials have adequate defect tolerance. deformation elastoplasticity fracture mechanics pipelines pipes tensile strength line pipe...
Journal Articles
Article Type: Offshore And Structural Mechanics
J. Offshore Mech. Arct. Eng. February 2011, 133(1): 011302.
Published Online: November 4, 2010
... that identify a given solution, in this case a riser configuration, and are used by the optimizer to find the best solution. Restricting the analysis to a free-hanging or a lazy-wave steel riser, compounded by three pipe segments with equal diameters and thicknesses and a floater in the middle segment...
Journal Articles
Article Type: Ocean Engineering
J. Offshore Mech. Arct. Eng. February 2011, 133(1): 011101.
Published Online: November 3, 2010
... in this type of pipes. For this purpose, two-equation turbulence models ( k − ϵ and k − ω ) are used in the computations. First, the fully developed turbulent flow in a conventional pipe is considered. Simulations are performed to validate the chosen models, boundary conditions, and computational grids...
Journal Articles
Article Type: Offshore And Structural Mechanics
J. Offshore Mech. Arct. Eng. February 2010, 132(1): 011302.
Published Online: December 22, 2009
... on these pipelines, resulting in localized wrinkles well into the plastic range of the pipe material. Eventually, there is a possibility of a fracture occurring at a wrinkled location under continuous deformation. A recent field fracture and a failed laboratory specimen have been observed within a telescopic wrinkle...
Journal Articles
Article Type: Offshore And Structural Mechanics
J. Offshore Mech. Arct. Eng. August 2009, 131(3): 031301.
Published Online: May 29, 2009
..., since the equations of the model are vector equations. As an alternative to the simplified approach used in the Orcina model, Wellstream has developed a more sophisticated analytical model as part of an ongoing R&D program to quantify the relationship between pipe 3D bending hysteresis...
Journal Articles
Article Type: Materials
J. Offshore Mech. Arct. Eng. August 2009, 131(3): 031401.
Published Online: May 28, 2009
...Ralf Peek; Heedo Yun Analytical solutions for the lateral buckling of pipelines exist for the case when the pipe material remains in the linearly elastic range. However for truly high temperatures and/or heavier flowlines, plastic deformation cannot be excluded. One then has to resort to finite...
Journal Articles
Article Type: Safety And Reliability
J. Offshore Mech. Arct. Eng. May 2009, 131(2): 021601.
Published Online: January 27, 2009
...Mir Emad Mousavi; Abbas Yeganeh Bakhtiary; Nastaran Enshaei Physical experiments have been conducted to study the scouring around a pipe over an erodible bed under wave motion. The results show that the depth of the wave-induced scour is reduced when the pipe is installed in a primary depth...
Journal Articles
Article Type: Technology Review
J. Offshore Mech. Arct. Eng. February 2009, 131(1): 014001.
Published Online: November 10, 2008
... for improvement and new research to advance the state-of-the-art. 04 12 2007 07 06 2008 10 11 2008 drag hazards impact (mechanical) offshore installations pipelines pipes submarine landslide submarine debris flow impact pipeline pile drag force An important design...
Journal Articles
Article Type: Offshore And Structural Mechanics
J. Offshore Mech. Arct. Eng. November 2008, 130(4): 041301.
Published Online: September 24, 2008
.... In particular, Lotveit and Bjaerum ( 7 ) presented a second-generation analysis tool for flexible pipes in which they modeled each layer separately and assembled them together using contact elements. A helical layer was modeled as an orthotropic sheath layer with appropriate material properties. Saevik ( 8...
Journal Articles
Article Type: Research Papers
J. Offshore Mech. Arct. Eng. February 2008, 130(1): 011010.
Published Online: February 20, 2008
...Xu Hailiang It is known from the principle that the pump–vessel combined ore lifting method has high head, large ores lifting capacity, and long-term working reliability. When applied to the deep-sea rigid pipe mining system, the main pump and power equipment installed on the mining ship is more...
Journal Articles
Article Type: Technical Papers
J. Offshore Mech. Arct. Eng. November 2007, 129(4): 318–326.
Published Online: April 18, 2007
...Hiroyuki Motohashi; Naoto Hagiwara By conducting curved wide plate tensile tests for girth welded joints of X80 line pipe containing a surface notch in the weld metal, the effects of strength matching on fracture performance were evaluated. Parametric studies were also conducted using a finite...
Journal Articles
Article Type: Technical Papers
J. Offshore Mech. Arct. Eng. August 2007, 129(3): 229–235.
Published Online: January 19, 2007
... on API 5L X60 and X80 grade line pipes. The tensile tests revealed that the tensile properties of the cold bends were comparable to the uniaxially prestrained specimens machined from the straight part of the pipes. A FE model simulating the cold bending process was verified with the full-scale...
Journal Articles
Article Type: Technical Papers
J. Offshore Mech. Arct. Eng. May 2007, 129(2): 131–137.
Published Online: October 5, 2006
... engineering pipes modal analysis beams (structures) 03 04 2006 05 10 2006 The rigid lengths a and c can be experimentally determined for each joint geometry by carrying out individual modal tests and comparing the test results against the beam model results through model...
Journal Articles
Article Type: Technical Papers
J. Offshore Mech. Arct. Eng. August 2007, 129(3): 219–228.
Published Online: August 3, 2006
...-dimensional pipe/soil interaction problem is modeled using nonlinear soil springs and special beam elements using the finite element method to estimate pipe response for statistically possible ranges of gouge depths, gouge widths, and burial depths. Relevant failure mechanisms have been considered, including...
Journal Articles
Article Type: Technical Papers
J. Offshore Mech. Arct. Eng. May 2006, 128(2): 108–118.
Published Online: November 15, 2005
...John M. Sheehan; Frank W. Grealish; Annette M. Harte; Russell J. Smith As the offshore industry moves towards deeper water developments and continues to embrace harsh environments, unbonded flexible pipes are increasingly being utilized as a cost effective riser solution. Furthermore...
Journal Articles
Article Type: Technical Papers
J. Offshore Mech. Arct. Eng. November 2006, 128(4): 322–329.
Published Online: October 2, 2005
... of initial imperfections on the behavior of segments of line pipe. Imperfections measured across the inside surface of pipe test specimens were incorporated into a finite element model that was developed to predict the experimental behavior of the specimens tested under combined loads of internal pressure...