Polyethylene (PE) pipes have been applied in transportation of key energy medium such as natural gas in the past decades. The mechanical property of PE is of great importance for better design and safer application of PE pipeline system. The large deformation behavior is a key character of PE, not only for its significant strain rate sensitivity, but also for localized necking process after yielding. In this paper, a new constitutive modeling method was proposed to charaterize the rate-denpendent large deformation behavior of PE, in which the true stress is regarded as a function of true stain and true strain rate alone. Uniaxial tensile tests of PE were conducted under various cross-head speeds, and a digital camera was used to record the real-time deformation of specimens. By separating the composite effect into respective effect of local true strain and strain rate on the local true stress in the necking region, a phenomenological model for describing the rate-dependent deformation behavior under uniaxial tension was ealstablished. Model results were validated and found in good agreement with experimental data.
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ASME 2013 Pressure Vessels and Piping Conference
July 14–18, 2013
Paris, France
Conference Sponsors:
- Pressure Vessels and Piping Division
- Nondestructive Evaluation Engineering Division
ISBN:
978-0-7918-5571-3
PROCEEDINGS PAPER
Study on Constitutive Modeling for Large Deformation Behavior of Polyethylene Considering Strain Rate Effect Available to Purchase
Sijia Zhong,
Sijia Zhong
Zhejiang University, Hangzhou, Zhejiang, China
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Jianfeng Shi,
Jianfeng Shi
Zhejiang University, Hangzhou, Zhejiang, China
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Jinyang Zheng
Jinyang Zheng
Zhejiang University, Hangzhou, Zhejiang, China
Search for other works by this author on:
Sijia Zhong
Zhejiang University, Hangzhou, Zhejiang, China
Jianfeng Shi
Zhejiang University, Hangzhou, Zhejiang, China
Jinyang Zheng
Zhejiang University, Hangzhou, Zhejiang, China
Paper No:
PVP2013-97778, V06BT06A048; 6 pages
Published Online:
January 17, 2014
Citation
Zhong, S, Shi, J, & Zheng, J. "Study on Constitutive Modeling for Large Deformation Behavior of Polyethylene Considering Strain Rate Effect." Proceedings of the ASME 2013 Pressure Vessels and Piping Conference. Volume 6B: Materials and Fabrication. Paris, France. July 14–18, 2013. V06BT06A048. ASME. https://doi.org/10.1115/PVP2013-97778
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