The effect of soil load on fracture behaviour of three-layer polymer pipe for non-pressurised applications

0452012 - ÚFM 2016 RIV CH eng C - Konferenční příspěvek (zahraniční konf.)
Ševčík, Martin - Arbeiter, F. - Hutař, Pavel - Pinter, G. - Náhlík, Luboš
The effect of soil load on fracture behaviour of three-layer polymer pipe for non-pressurised applications.
Advances in Fracture and Damage Mechanics XIII. Zürich: Trans Tech publications, 2015 - (Alfaiate, J.; Aliabadi, M.), s. 197-200. Key Engineering Materials, 627. ISBN 978-3-03835-235-8. ISSN 1013-9826.
[FDM 2014 International Conference on Fracture and Damage Mechanics /13./. São Miguel Island, Azores (PT), 23.09.2014-25.09.2014]
Grant CEP: GA ČR(CZ) GAP108/12/1560; GA MŠMT(CZ) EE2.3.30.0063
Institucionální podpora: RVO:68081723
Klíčová slova: multi-layer polymer pipe * soil load * stress intensity factor * slow crack growth
Kód oboru RIV: JL - Únava materiálu a lomová mechanika

Fracture behaviour of a three-layer polymer pipe subjected to nonhomogenous distribution of external pressure induced by soil embedding is studied in this paper. Both long term and additional short term loading is considered. Such loading induces tensile stresses in the inner pipe wall which can lead to crack initiation and further slow crack propagation. The material interface between a protective layer and the base pipe can contribute to crack deceleration and can prolong the residual lifetime of the pipe. The paper presents three-dimensional numerical analysis of a commercial three-layer pipe containing an internal semi-elliptical crack. The effect of soil load on the fracture behaviour of the cracked pipe is quantified and discussed.
Trvalý link: http://hdl.handle.net/11104/0253193