Effect of recycled material on failure by slow crack growth in multi-layer polyethylene pipes

0573955 - ÚFM 2024 RIV GB eng J - Článek v odborném periodiku
Trávníček, Lukáš - Poduška, Jan - Messiha, M. - Arbeiter, F. - Pinter, G. - Náhlík, Luboš - Hutař, Pavel
Effect of recycled material on failure by slow crack growth in multi-layer polyethylene pipes.
Engineering Fracture Mechanics. Roč. 289, SEP (2023), s. 109423. ISSN 0013-7944. E-ISSN 1873-7315
Institucionální podpora: RVO:68081723
Klíčová slova: Slow crack growth (SCG) * Recycled polyethylene * Multi-layer pipe * Lifetime estimation * High-density polyethylene (HDPE) * PE100 grade
Obor OECD: Audio engineering, reliability analysis
Impakt faktor: 5.4, rok: 2022
Způsob publikování: Omezený přístup
https://www.sciencedirect.com/science/article/pii/S0013794423003818?via%3Dihub

Among polymer materials, high-density polyethylene (HDPE) is one of the most demanded polymers for packaging as well as in sectors with higher material requirements, such as the plastic pipe industry. The extensive use of HDPE means it is often present in municipal waste. Therefore, there is a high potential for reprocessing and exploring new applications for recycled HDPE, aiming for a circular economy. In the plastic pipe industry, recyclates have found practical use in non-pressure applications. However, the high structural and loading requirements do not allow using it for pressurized pipes yet. The presented study is focused on the possible utilization of recycled HDPE in pressurized pipes in the form of a layer in a multi-layer pipe with two protective layers made of virgin HDPE. The performance of the pipes is assessed based on numerical simulations, coupled with lifetime estimations. The lifetime assessment is based on linear elastic fracture mechanics using experimentally measured slow crack growth (SCG) rates in the virgin and recycled HDPE grades. Thanks to the numerical models, it was possible to describe damage by SCG of the multi-layer pipe as well as to find the dependency of the pipe performance on the thickness ratio and material properties of the layers.
Trvalý link: https://hdl.handle.net/11104/0344336