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Open AccessArticle

A Numerical and Experimental Study of Adhesively-Bonded Polyethylene Pipelines

1
ENSIAME, Université de Valenciennes et du Hainaut-Cambrésis, Le Mont-Houy, 59313 Valenciennes CEDEX 9, France
2
Rosen Group, Quorum Business Park, Newcastle upon Tyne NE12 8BS, UK
3
Department of Mechanical and Construction Engineering, Northumbria University, Newcastle upon Tyne NE1 8ST, UK
*
Author to whom correspondence should be addressed.
Polymers 2019, 11(9), 1531; https://doi.org/10.3390/polym11091531
Received: 20 August 2019 / Revised: 16 September 2019 / Accepted: 17 September 2019 / Published: 19 September 2019
Adhesive bonding of polyethylene gas pipelines is receiving increasing attention as a replacement for traditional electrofusion welding due to its potential to produce rapid and low-cost joints with structural integrity and pressure tight sealing. In this paper a mode-dependent cohesive zone model for the simulation of adhesively bonded medium density polyethylene (MDPE) pipeline joints is directly determined by following three consecutive steps. Firstly, the bulk stress-strain response of the MDPE adherend was obtained via tensile testing to provide a multi-linear numerical approximation to simulate the plastic deformation of the material. Secondly, the mechanical responses of double cantilever beam and end-notched flexure test specimens were utilised for the direct extraction of the energy release rate and cohesive strength of the adhesive in failure mode I and II. Finally, these material properties were used as inputs to develop a finite element model using a cohesive zone model with triangular shape traction separation law. The developed model was successfully validated against experimental tensile lap-shear test results and was able to accurately predict the strength of adhesively-bonded MPDE pipeline joints with a maximum variation of <3%. View Full-Text
Keywords: polyethylene; adhesively-bonded joints; double cantilever beam; end-notched flexure; finite element analysis; cohesive zone model polyethylene; adhesively-bonded joints; double cantilever beam; end-notched flexure; finite element analysis; cohesive zone model
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MDPI and ACS Style

Guilpin, A.; Franciere, G.; Barton, L.; Blacklock, M.; Birkett, M. A Numerical and Experimental Study of Adhesively-Bonded Polyethylene Pipelines. Polymers 2019, 11, 1531.

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