Electrofusion joint plays an important role in connecting polyethylene (PE) pipe. In our previous study, penetrating crack failure through the fitting with an angle of about 70° was observed, and axial stress was found to be an important factor in the crack propagation. In this paper, experiments were carried out to study the crack propagation phenomena of the electrofusion joint of PE pipe. Digital Image Correlation (DIC) method was used to measure the displacement on specimen’s surface, as well as full-field strain distribution, based on which the J-integral of the crack tip was calculated. Besides, a finite element numerical simulation was conducted, and its accuracy was verified by experimental J-integral value. Through combination of experimental observations and finite element method, the phenomenon that the angle between crack propagation direction and tube axial is about 70° is detailed analysed. By comparison and analysis of the testing results, critical J-integral value during crack propagation is determined. Furthermore, critical J-integral value of crack propagation in electrofusion joint is predicted.
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ASME 2018 Pressure Vessels and Piping Conference
July 15–20, 2018
Prague, Czech Republic
Conference Sponsors:
- Pressure Vessels and Piping Division
ISBN:
978-0-7918-5166-1
PROCEEDINGS PAPER
Study of Mode I-II Mixed Crack Propagation in Electrofusion Joint of Polyethylene Pipe
Jianfeng Shi,
Jianfeng Shi
Zhejiang University, Hangzhou, China
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Jinyang Zheng
Jinyang Zheng
Zhejiang University, Hangzhou, China
Search for other works by this author on:
Yue Zhang
Zhejiang University, Hangzhou, China
Jianfeng Shi
Zhejiang University, Hangzhou, China
Jinyang Zheng
Zhejiang University, Hangzhou, China
Paper No:
PVP2018-84484, V005T10A020; 10 pages
Published Online:
October 26, 2018
Citation
Zhang, Y, Shi, J, & Zheng, J. "Study of Mode I-II Mixed Crack Propagation in Electrofusion Joint of Polyethylene Pipe." Proceedings of the ASME 2018 Pressure Vessels and Piping Conference. Volume 5: High-Pressure Technology; ASME Nondestructive Evaluation, Diagnosis and Prognosis Division (NDPD); Rudy Scavuzzo Student Paper Symposium and 26th Annual Student Paper Competition. Prague, Czech Republic. July 15–20, 2018. V005T10A020. ASME. https://doi.org/10.1115/PVP2018-84484
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