Experimental study on the indentation resistance of water pipelines repaired by polyester resins

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Derakhshan Sayed Sadegh; Niknejad Abbas; Ziaee Sima

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Paper Information

Journal: IRANIAN JOURNAL OF MANUFACTURING ENGINEERING Year:2019 | Volume:6 | Issue:6 Page(s): 1-11

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Information Journal Paper

Title

Experimental study on the indentation resistance of water pipelines repaired by polyester resins

Author(s)

Derakhshan Sayed Sadegh | Niknejad Abbas | Ziaee Sima | Issue Writer Certificate

Keywords

Water pipelines repair

Polyester Resin

Leakage

damaged pipe

Drinking Water

Abstract

In this article, indentation process of damaged Drinking Water pipelines, repaired by the Polyester Resin is experimentally investigated, while they are under two different conditions of constant and variable inner pressures. For this purpose, a mechanical defect is machined in the pipe wall, and then, the damaged part of the tube is repaired by the Polyester Resin. Then, to inject water into the tube and apply different pressures, a two-end blinded tube is connected to a hydraulic circuit. Then, the specimen with a certain inner pressure is placed into the universal testing machine, between a rigid platen and a cylindrical punch. By applying the lateral force on the specimen, indentation test is performed in quasi-static condition; and it continues, up to considering the first Leakage effect in the repaired zone. In one type of the tests, inner pressure is kept in a constant value during the indentation progress; and in the other type, inner pressure increases, slowly, due to indenting the tube wall. In each test, initial pressure, sample deformation mode, ultimate displacement of the punch, ultimate force, and energy absorption are measured; and in the variable pressure tests, ultimate pressure is also recorded. The variable pressure experiments show that when initial pressure increases, ultimate displacement of the punch, ultimate force and energy absorption decrease; while, in the constant pressure experiments, by increasing the constant inner pressure up to 14 bar, ultimate displacement, ultimate force and absorbed energy increase; and then, in higher inner pressures, the mentioned parameters follow a decreasing trend.

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APA: Copy

Derakhshan, Sayed Sadegh, Niknejad, Abbas, & Ziaee, Sima. (2019). Experimental study on the indentation resistance of water pipelines repaired by polyester resins. IRANIAN JOURNAL OF MANUFACTURING ENGINEERING, 6(6 ), 1-11. SID. https://sid.ir/paper/268256/en

Vancouver: Copy

Derakhshan Sayed Sadegh, Niknejad Abbas, Ziaee Sima. Experimental study on the indentation resistance of water pipelines repaired by polyester resins. IRANIAN JOURNAL OF MANUFACTURING ENGINEERING[Internet]. 2019;6(6 ):1-11. Available from: https://sid.ir/paper/268256/en

IEEE: Copy

Sayed Sadegh Derakhshan, Abbas Niknejad, and Sima Ziaee, “Experimental study on the indentation resistance of water pipelines repaired by polyester resins,” IRANIAN JOURNAL OF MANUFACTURING ENGINEERING, vol. 6, no. 6 , pp. 1–11, 2019, [Online]. Available: https://sid.ir/paper/268256/en

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