Evaluation of the response of fibre reinforced composite repair of steel pipeline subjected to puncture from excavator tooth

2018 ◽  
Vol 202 ◽  
pp. 1126-1135 ◽  
Author(s):  
Łukasz Mazurkiewicz ◽  
Jerzy Małachowski ◽  
Krzysztof Damaziak ◽  
Michał Tomaszewski
Keyword(s):  
Composite Repair ◽  
Steel Pipeline ◽  
Reinforced Composite ◽  
Excavator Tooth

scholarly journals Finite Element Analysis of Composite Repair for Damaged Steel Pipeline

Coatings ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 301
Author(s):  
Jiaqi Chen ◽  
Hao Wang ◽  
Milad Salemi ◽  
Perumalsamy N. Balaguru
Keyword(s):  
Finite Element ◽  
Shear Stress ◽  
Hoop Stress ◽  
Pipe Wall ◽  
Von Mises Stress ◽  
Repair System ◽  
Composite Repair ◽  
Steel Pipeline ◽  
Von Mises ◽  
Infill Material

Carbon fiber reinforced polymer (CFRP) matrix composite overwrap repair systems have been introduced and accepted as an alternative repair system for steel pipeline. This paper aimed to evaluate the mechanical behavior of damaged steel pipeline with CFRP repair using finite element (FE) analysis. Two different repair strategies, namely wrap repair and patch repair, were considered. The mechanical responses of pipeline with the composite repair system under the maximum allowable operating pressure (MAOP) was analyzed using the validated FE models. The design parameters of the CFRP repair system were analyzed, including patch/wrap size and thickness, defect size, interface bonding, and the material properties of the infill material. The results show that both the stress in the pipe wall and CFRP could be reduced by using a thicker CFRP. With the increase in patch size in the hoop direction, the maximum von Mises stress in the pipe wall generally decreased as the maximum hoop stress in the CFRP increased. The reinforcement of the CFRP repair system could be enhanced by using infill material with a higher elastic modulus. The CFRP patch tended to cause higher interface shear stress than CFRP wrap, but the shear stress could be reduced by using a thicker CFRP. Compared with the fully bonded condition, the frictional interface causes a decrease in hoop stress in the CFRP but an increase in von Mises stress in the steel. The study results indicate the feasibility of composite repair for damaged steel pipeline.

Discussion about Application of Composite Repair Technique in Pipeline Engineering

2011 ◽  
Vol 311-313 ◽  
pp. 185-188 ◽  
Author(s):  
Wei Feng Ma ◽  
Jin Heng Luo ◽  
Ke Cai
Keyword(s):  
Fiber Composite ◽  
New Technology ◽  
Engineering Application ◽  
Development Trend ◽  
Indicator System ◽  
Field Application ◽  
Clear Understanding ◽  
Composite Repair ◽  
Steel Pipeline ◽  
Reinforced Steel

Fiber composite repair reinforced steel pipeline structure is new technology developed in the nineties of the twentieth century, the technology is highly regarded in the world, has already become a development trend of repair reinforced steel pipeline structure. This paper reviews the problem existing, such as interfacial debonding, layered, empty drum, blank holder and no or incomplete sealing in the repair and reinforcement technique of composite during engineering application. The corresponding formation reason is primarily analyzed according to the construction experience. On the basis, it is pointed out that it is very necessary to establish the check and evaluating indicator system of the field construction acceptance process and field application effect of the fiber composite used in repairing and reinforcing the pipeline, which of the aim is to improve the repair and reinforcement quality and to obtain a full and clear understanding about the repair status and effect of the repair points in the repaired service pipeline.

Finite Element Modelling of Composite Repair in Offshore Pipe Riser

2012 ◽  
Vol 557-559 ◽  
pp. 2239-2242 ◽  
Author(s):  
Park Hinn Chan ◽  
Kim Yeow Tshai ◽  
Michael Johnson ◽  
Hui Leng Choo ◽  
Shuguang Li
Keyword(s):  
Finite Element ◽  
Internal Pressure ◽  
Finite Element Modelling ◽  
Input Data ◽  
World Wide ◽  
Composite Repair ◽  
Element Modelling ◽  
Reinforced Composite ◽  
First World

The effects of coupled internal pressure and external tension on corroded offshore pipe riser repaired with a designated laminate orientation of carbon/epoxy (C/E) and E-glass/epoxy (EG/E) fibre reinforced composite (FRC) was evaluated. The steel riser (API 5L X60) was characterised through Ramberg-Osgood model while input data of the composites were extracted from those used as benchmark for analysis in the first world-wide failure exercise (WWFE) [1, 2]. It was found that the C/E composite provides superiority over the EG/E and laminates with a dedicated orientation is capable of enhancing the performance of risers subjected to the coupled loadings.

An Investigation Into the Behaviour of Composite Repaired Pipelines Under Combined Internal Pressure and Bending

2009 ◽  
Author(s):  
Ahmed Shouman ◽  
Farid Taheri
Keyword(s):  
Internal Pressure ◽  
Combined Loading ◽  
Repair System ◽  
Loading Conditions ◽  
Fiber Reinforced ◽  
Defect Region ◽  
Element Analysis ◽  
Composite Repair ◽  
Fiber Reinforced Composite ◽  
Reinforced Composite

The repair of corroded pipelines with fiber reinforced composite materials has gained wide acceptance in the oil and gas transportation industry over recent times. It has been integrated into the ASME B31.4 and B31.8 pipeline codes, along with CSA Z662. A considerable amount of experimental research has been conducted on fiber reinforced composite repaired pipelines with external corrosion defects subject to hydrostatic internal pressure. However, the effects of the internal pressure, thermal loads and geotechnical loads create combined loading conditions on the buried pipeline that need to be considered. This paper aims to address the effectiveness of fiber reinforced composite repair systems on externally corroded pipelines under combined internal pressure and bending. For that, finite element analysis is conducted to examine the effects of various loading conditions on the effectiveness of the fiber reinforced composite repair system. Typical conventional commercially available fiber reinforced composite wrap systems are used for this purpose. Three loading conditions are considered on both conventionally repaired and unrepaired pipes subject to internal pressure, pure bending and combined internal pressure and bending. Results show that up to the stage of yielding of the steel in the defect region, the steel elastic stiffness counteracts most of the stress that is induced by the in-service loading conditions. Once the pipe is loaded beyond the yielding point of its material at the defect region, the composite starts to take effect, thus carrying a significant portion of the applied stresses. Essentially, by comparing the burst pressures of repaired pipes against unrepaired pipes, it is shown that the fiber reinforced composite system restores the minimum specified strength of the pipe to its value before the defects were applied. The results presented in the paper are believed to reveal the response of the wraps subject to realistic combined loading conditions that to our knowledge are nonexistent in open literature.

Stress distribution analysis of composite repair with Carbon Nanotubes reinforced putty for damaged steel pipeline

2021 ◽  
Vol 194 ◽  
pp. 104537
Author(s):  
Hanis Hazirah Arifin ◽  
Libriati Zardasti ◽  
Kar Sing Lim ◽  
Norhazilan Md. Noor ◽  
Nordin Yahaya ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Stress Distribution ◽  
Distribution Analysis ◽  
Composite Repair ◽  
Steel Pipeline

Mathematical Model of the Effective Properties of a Fiber Reinforced Composite with a Linearly Graded Transition Zone

2010 ◽  
Vol 38 (4) ◽  
pp. 286-307
Author(s):  
Carey F. Childers
Keyword(s):  
Mathematical Model ◽  
Transition Zone ◽  
Effective Properties ◽  
Local Stress ◽  
Stress And Strain ◽  
Fiber Reinforced ◽  
Strain Fields ◽  
Shear Moduli ◽  
Fiber Reinforced Composite ◽  
Reinforced Composite

Abstract Tires are fabricated using single ply fiber reinforced composite materials, which consist of a set of aligned stiff fibers of steel material embedded in a softer matrix of rubber material. The main goal is to develop a mathematical model to determine the local stress and strain fields for this isotropic fiber and matrix separated by a linearly graded transition zone. This model will then yield expressions for the internal stress and strain fields surrounding a single fiber. The fields will be obtained when radial, axial, and shear loads are applied. The composite is then homogenized to determine its effective mechanical properties—elastic moduli, Poisson ratios, and shear moduli. The model allows for analysis of how composites interact in order to design composites which gain full advantage of their properties.

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