Rapid change of stresses in thickness direction in long orthotropic tube under internal pressure and axial load

2009 ◽  
Vol 211 (3-4) ◽  
pp. 323-336 ◽  
Author(s):  
Sergey V. Dmitriev ◽  
Nobuhiro Yoshikawa ◽  
Radik R. Mulyukov
Keyword(s):  
Internal Pressure ◽  
Axial Load ◽  
Rapid Change ◽  
Thickness Direction

Finite Element Analysis of the Shell of GIS Busbar Tube

2014 ◽  
Vol 889-890 ◽  
pp. 1406-1409 ◽  
Author(s):  
Ming Jian Jian ◽  
Guang Cheng Zhang ◽  
Du Qing Zhang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Stress Concentration ◽  
Internal Pressure ◽  
Gas Pressure ◽  
Thickness Direction ◽  
Element Analysis ◽  
Finite Element Software ◽  
Concentration Degree ◽  
Inside Out

By finite element software ANSYS a model of GIS busbar tube was established for investigating the effect of the gas pressure on the shell. The results shows that the stress concentration degree is higher on the shoulder between the main tube and the branch pipes under the internal pressure and the gravity, and the highest value is 44.92MPa which is far lower than the admissible stress. Stress changed along the thickness direction, and its value decreased gradually from the inside out. The distributions of the strain and deformation are similar to that of the stress.

scholarly journals Influence of axial load on internal pressure creep of Mod.9Cr-1Mo circumferential welded pipe

2015 ◽  
Vol 81 (827) ◽  
pp. 15-00021-15-00021 ◽  
Author(s):  
Takashi OGATA ◽  
Toshiki MITSUEDA ◽  
Hiroshi SAKAI
Keyword(s):  
Internal Pressure ◽  
Axial Load ◽  
Welded Pipe

scholarly journals Transverse Deformation of Pressurised Pipes With Different Axial Loads

2017 ◽  
Author(s):  
Martin Kristoffersen ◽  
Tore Børvik ◽  
Magnus Langseth ◽  
Håvar Ilstad ◽  
Erik Levold
Keyword(s):  
Internal Pressure ◽  
Axial Load ◽  
Tensile Load ◽  
Displacement Curve ◽  
Design Codes ◽  
Axial Loads ◽  
Axial Tensile ◽  
Local Dent ◽  
Force Displacement ◽  
Good Agreement

Pipelines residing on the seabed are exposed to various hazards, one of them being denting, hooking and release of the pipeline by e.g. anchors or trawl gear. As a pipeline is displaced transversely in a hooking event, an axial tensile load resisting the displacement builds up in the pipeline. This study examines the effect of applying three different axial loads (zero, constant, and linearly increasing) to a pipe while simultaneously deforming it transversely. A fairly sharp indenter conforming to the prevailing design codes was used to deform the pipes. These three tests were repeated with an internal pressure of about 100 bar for comparison. Adding an axial load appeared to increase the pipe’s stiffness in terms of the force-displacement curve arising from deforming the pipe transversely. The internal pressure also increased the stiffness, and produced a more local dent in the pipe compared with the unpressurised pipes. All tests were recreated numerically in finite element simulations. Generally, the results of the simulations were in good agreement with the experiments.

Creep rupture behaviour of circumferentially welded mod. 9Cr–1Mo steel pipe subject to internal pressure and axial load

2016 ◽  
Vol 33 (6) ◽  
pp. 636-643 ◽  
Author(s):  
Takamitsu Himeno ◽  
Yasuharu Chuman ◽  
Takumi Tokiyoshi ◽  
Takuya Fukahori ◽  
Toshihide Igari
Keyword(s):  
Internal Pressure ◽  
Axial Load ◽  
Creep Rupture ◽  
Steel Pipe

Buckling of Double Bellows Expansion Joints under Internal Pressure

1964 ◽  
Vol 6 (3) ◽  
pp. 270-277 ◽  
Author(s):  
D. E. Newland
Keyword(s):  
Internal Pressure ◽  
Axial Load ◽  
Expansion Joint ◽  
Expansion Joints ◽  
Supporting Structure ◽  
Universal Expansion ◽  
Critical Buckling Pressure

Corrugated bellows expansion joints may buckle under internal pressure in the same way as an elastic strut may buckle under an axial load. This paper is concerned with the analysis of this phenomenon for the ‘universal expansion joint’ which incorporates two bellows joined by a length of rigid pipe. The principal conclusion is that, by providing a correctly designed supporting structure, the critical buckling pressure can be increased to up to four times its value for the same system with no supports.

Elasticity Solutions for a Sandwich Orthotropic Cylindrical Shell Under External/Internal Pressure, and Axial Load

2000 ◽  
Author(s):  
George A. Kardomateas
Keyword(s):  
Internal Pressure ◽  
Axial Load ◽  
Orthotropic Cylindrical Shell ◽  
Sandwich Shell ◽  
Cylindrical Sandwich Shell ◽  
Sandwich Construction ◽  
The Face ◽  
Elasticity Solutions ◽  
The One ◽  
The Individual

Abstract The elasticity solution is constructed for a cylindrical sandwich shell under external and/or internal pressure and for the same shell under axial load. The solution is an extension of the one for a homogeneous, monolithic shell and is provided in closed form. All three phases, i.e., the two face-sheets and the core are assumed to be orthotropic. Moreover, there are no restrictions as far as the individual thicknesses of the face-sheets and the sandwich construction may even be asymmetric. These solutions can be used as benchmarks for assessing the performance of various sandwich shell theories. Illustrative results are provided in comparison to the sandwich shell theory.

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