Point load effect determination for different pressure pipe SDR series

0452016 - ÚFM 2016 RIV CH eng C - Conference Paper (international conference)
Majer, Zdeněk - Ševčík, Martin - Náhlík, Luboš - Hutař, Pavel
Point load effect determination for different pressure pipe SDR series.
Advances in Fracture and Damage Mechanics XIII. Zürich: Trans Tech publications, 2015 - (Alfaiate, J.; Aliabadi, M.), s. 373-376. 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]
R&D Projects: GA ČR(CZ) GAP108/12/1560
Institutional support: RVO:68081723
Keywords : polymer pressure pipes * point load * FEM * stress intensity factor * lifetime prediction
Subject RIV: JL - Materials Fatigue, Friction Mechanics

In the paper the polymer pipes loaded by internal pressure with additional point load on the external surface are studied using numerical methods. It is shown that the additional external loading can significantly influence residual lifetime of the pressured pipe. In this study the effect of the pipe geometry is considered. The shape of the propagating crack is estimated based on a special algorithm and the stress intensity factor is evaluated by direct method. The relation between crack size and a geometric function for specific material and geometrical properties is found. The results of this paper should contribute to better understanding of the real pipe behavior and to prevent unexpected failure of the pressured pipe system due to non-homogenous distribution of the soil load.
Permanent Link: http://hdl.handle.net/11104/0253201