Transverse impact characteristics of a rubber pipe expansion joint

2012 ◽  
Vol 26 (6) ◽  
pp. 1655-1661
Author(s):  
Yong Chen ◽  
Wang Yu ◽  
ZhiYi Zhang ◽  
Hongxing Hua
Keyword(s):  
Expansion Joint ◽  
Transverse Impact ◽  
Pipe Expansion ◽  
Impact Characteristics

The Effect of the Boundary Conditions on the Impact Behaviors of Stitched Composite Lap Joints

2016 ◽  
Vol 25 (1) ◽  
pp. 096369351602500
Author(s):  
Emin Ergun ◽  
Ismail Gökkaya
Keyword(s):  
Boundary Conditions ◽  
Energy Levels ◽  
Composite Plates ◽  
Lap Joints ◽  
Transverse Impact ◽  
Adhesively Bonded ◽  
Bonded Composite ◽  
Infusion Method ◽  
Impact Characteristics ◽  
The Impact

In this study, transverse impact behaviors of stitch adhesively bonded composite lap joints having three different overlap lengths (20, 40 and 60 mm) at different energy levels are investigated. The effects of the boundary conditions (clamped-clamped and clamped-free) and three different span lengths (40, 60 and 80 mm) have been determined. The impacts energies are varied in a range from 5 J to 20 J. Vacuum assisted resin infusion method (VARIM) is used to manufacture composite plates. It is shown that the boundary conditions and span lengths affect considerably the impact responses of the stitch composites lap joints. The important impact characteristics of the composite lap joints are compared with each other and discussed. The observed damages of the composite lap joints are presented.

Cryogenic expansion joint for LNG service

2017 ◽  
Vol 57 (1) ◽  
pp. 211
Author(s):  
Minyuan Lu ◽  
Cameron Wheeler ◽  
Stephanie Weir
Keyword(s):  
Capital Expenditure ◽  
Large Temperature ◽  
Expansion Joint ◽  
Expansion Joints ◽  
Pipe Expansion ◽  
Cryogenic Liquids ◽  
High Thermal Expansion ◽  
Facility Construction ◽  
Cryogenic Conditions ◽  
High Thermal Expansion Coefficient

Pipelines transporting cryogenic liquids, such as liquefied natural gas (LNG), are typically constructed with metal components with a relatively high thermal expansion coefficient. Pipelines contract in length due to the large temperature differential that occurs. To accommodate this thermal contraction, LNG plants, offloading jetties, and other facilities typically utilise expansion loops and/or conventional in-line expansion joints (e.g. bellows). However, expansion loops require a large amount of space and support platforms, which can be costly and/or disruptive to an LNG facility construction. Additionally, conventional bellows-type expansion joints offer very little torsional strength, which may lead to catastrophic failure in the joint. Engineers at Clough Limited have patented two unique embodiments of a cryogenic expansion joint: a sliding concentric pipe-in-pipe cryogenic expansion joint; and a torsional cryogenic expansion joint. Both designs utilise inherent material properties to seal sequential pipeline segments together at cryogenic conditions. The pipe-in-pipe expansion joint provides large axial and unlimited torsional movement. The torsional expansion joint provides unlimited radial and some axial movement. These embodiments eliminate the large conventional expansion loops and reduce project capital expenditure.

Research on Dynamic Characteristics of Penstock and Expansion Joint Structure in Hydropower Station

2011 ◽  
Vol 250-253 ◽  
pp. 2881-2887
Author(s):  
Hua Gu ◽  
Gen Hua Yan
Keyword(s):  
Natural Vibration ◽  
Fluid Structure Interaction ◽  
Structural Vibration ◽  
Hydropower Station ◽  
Expansion Joint ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Joint Structure ◽  
Pipe Expansion ◽  
3D Finite Element Method

During electricity generation in Hydropower Station, there’s pulsating pressure load on discharge flow, which induces vibration and fatigue damage on expansion joint structure. In this essay, through 3D Finite Element Method we conduct research about natural vibration characteristics of honeycomb duct of steel waterline pipe expansion joint under the condition of fluid-structure interaction, analyzing and researching the characteristics of vibratory modes with fluid-structure interaction on penstock between adjacent domains. By the above effort, we acquire the parameters of vibratory modes on structure, including those like natural frequency and corresponding vibratory modes of structural low level, which provides basis for structural vibration analysis.

Expansion Joint

1900 ◽  
Vol 50 (1280supp) ◽  
pp. 20522-20522
Keyword(s):  
Expansion Joint

Behavior of composite shells under transverse impact and quasi-static loading

AIAA Journal ◽  
1998 ◽  
Vol 36 ◽  
pp. 1065-1073
Author(s):  
Brian L. Wardle ◽  
Paul A. Lagace
Keyword(s):  
Static Loading ◽  
Composite Shells ◽  
Transverse Impact

Study on Temperature Effect of Single Expansion Joint Bridge

2012 ◽  
Vol 18 (5) ◽  
pp. 1619-1626
Author(s):  
Yibin Zhao ◽  
Xudong Shao ◽  
Jia Li ◽  
Xiaoqin Jin ◽  
Jing Ma ◽  
...  
Keyword(s):  
Temperature Effect ◽  
Expansion Joint

Effect of pipe expansion on the redistribution of residual stresses after molding

2020 ◽  
Vol 10 (2) ◽  
pp. 122-126
Author(s):  
Nikolay A. Makhutov ◽  
◽  
Dmitry A. Neganov ◽  
Eugeny P. Studenov ◽  
◽  
...  
Keyword(s):  
Residual Stresses ◽  
Strain Distribution ◽  
Strain State ◽  
Stress And Strain ◽  
Cylindrical Shape ◽  
Pipe Material ◽  
Pipe Expansion ◽  
Calculation Results ◽  
Residual Deformations ◽  
Stress And Strain Distribution

In the factory, pipes for trunk oil and oil product pipelines are obtained by molding and welding. To ensure a cylindrical shape and reduce technological residual stresses, expansion technology is used. Pipe expansion causes a significant change in the values of residual deformations and stresses. The article presents both the calculation results and graphs regarding stress and strain distribution during bending of the stock and their redistribution after expansion. Based on the calculation results, the final total values of residual stresses and residual deformations caused by bending and expansion were stated to be important components of the stress-strain state observed in pipelines being operated under cyclic loading, as well as those used in assessing how degradation affects the ductility of the pipe material. These factors were concluded as being reasonably taken into account when performing verification calculations regarding long-running pipelines if, based on their diagnostics and analysis, their state does not meet modern strength requirements.

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