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Research Article

Environmental stress cracking of chemically aged HDPE-100 gas pipe under impact fracture mode

Khaoula Berkas1Kamel Chaoui1Wafia Ghabeche2Latifa Alimi3, Abir Guenouche1Fatima Zohra Melais4

1Mechanics of Materials and Industrial Maintenance Research Laboratory (LR3MI), Mechanical Eng. Dept., Faculty of Technology, Badji Mokhtar University, PO Box 12, 23005 Annaba, Algeria

2Electrical Eng. Dept., Faculty of Technology, Abderahmane Mira University, Targa Ouzemour, 06000 Béjaia, Algeria

3Research Center in Industrial Technologies (CRTI), PO Box 64, Chéraga, 16014 Algiers, Algeria

4Civil Eng. Dept., Faculty of Technology, Badji Mokhtar University, PO Box 12, 23005 Annaba, Algeria



Polyethylene pipe;

Ageing effects;


Charpy fracture energy;

Fracture surface

High-density polyethylene (HDPE) pipes are widely employed for urban gas, water and sewage transportation networks because of economic considerations and very satisfactory lifetimes. As they are straight forwardly designated for numerous hostile conditions, the stress cracking resistance needs to be investigated in combination with ageing in controlled environments. This study is set to investigate long-term sorption experiments followed by Charpy fracture tests using the same arc-shaped specimens machined from HDPE pipe. Chemically ageing media are deionized water (DW) and both hydrochloric (HA) and acetic acids (AA). For the first 4 weeks, it is found that % weight change increased drastically for HA medium. Then, for the next 30 weeks period, the inverse situation took place as the % weight change for HA diminished tending nearly to zero while it augmented for DW and AA environments. Within the first week, the impact fracture energy of HDPE decreased for all media and then increased substantially for both acids well above the as-received (AR) reference line. Charpy energy experienced a monotonic decrease for DW as swelling enhancement is promoted in the absence of plasticized material. After 7 months ageing, both acids show much higher Charpy energies than AR and DW specimens and a substantial increase in ductility. The resilience changes with respect to AR tests are respectively +110%, +75% and –25.8% for HA, AA and DW. It is accepted that strong acids (i.e., HA) easily deplete antioxidants and carbon black mixed with the resin. The combined effects of both mechanical and chemical processes can serve a more representative durability studies of HDPE pipes including ESC phenomenon.

© 2023 MIM Research Group. All rights reserved.


20/04/2024 Collaboration for HSTD-2024Editorial Board of our journal and Organizing Committee of the III. International Conference on High-Speed Transport Development (HSTD) have agreed to collaborate. Extended versions of the selected papers from the conference will be published in our journal. For more see Events.

20/04/2024 Collaboration for DSL2024-SS1Editorial Board of our journal and Organizing Committee of the DSL2024 Fluid Flow, Energy Transfer & Design (SS1) have agreed to collaborate. Extended versions of the selected papers from the session will be published in our journal. For more see Events. .

8/12/2023 Special Issue: Embark on a journey of innovation with the journal of Research on Engineering Structures and Materials as we unveil a compelling opportunity for contributors in our upcoming special issue, "Design, Analysis, and Manufacturing of Composite Vehicle Structures." Led by distinguished Guest Editors Liubov Gavva and Oleg Mitrofanov from Moscow Aviation Institute. For more info see the link.

(More details of the news may be given in the News section)

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2023 Reviewer Awards:

Please, visit Reviewer Awards section for the winners of the 2022 RESM reviewer awards.

2023 Best Paper Award:

The paper authored by Ferzan Fidan, Naim Aslan, Mümin Mehmet Koç entitled as “Morpho-structural and compressive mechanical properties of graphene oxide reinforced hydroxyapatite scaffolds for bone tissue applications” is awarded.

2023 Most Cited Paper Award:

The paper authored by Ercan Işık, Ehsan Harirchian, Hüseyin Bilgin, Kirti Jadhav entitled as “The effect of material strength and discontinuity in RC structures according to different site-specific design spectra" is awarded.


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