Lifetime calculation of soil-loaded non-pressure polymer pipes

0533090 - ÚFM 2024 RIV CH eng C - Conference Paper (international conference)
Poduška, Jan - Hutař, Pavel - Frank, A. - Pinter, G. - Náhlík, Luboš
Lifetime calculation of soil-loaded non-pressure polymer pipes.
Advances in Fracture and Damage Mechanics XVIII. Zurrich: Trans Tech Publications, 2020 - (Paipetis, S.; Aliabadi, F.), s. 141-146. Key Engineering Materials, 827. ISBN 978-3-0357-1586-6. ISSN 1013-9826.
[FDM 2019 International Conference on Fracture and Damage Mechanics /18./. Rhodos (GR), 16.09.2019-18.09.2019]
R&D Projects: GA MŠMT LM2015069
Institutional support: RVO:68081723
Keywords : Finite element simulation * Lifetime * Non-pressure pipe * Plastic pressure pipe * Slow crack growth * Soil load
OECD category: Applied mechanics

Outstanding durability of plastic pressure and non-pressure pipes can cause difficulties, when a reasonable lifetime estimation is needed. It is impossible to prove the lifetime by testing, but there is a method of calculation that can provide a certain idea about the expected lifetime. The lifetime estimation is based on the assumption that the failure occurs as a result of the slow crack growth mechanism and it is calculated using the linear elastic fracture mechanics approach. Numerical simulations of crack growth in the pipe are necessary for this calculation. These simulations must consider various effects that can play a role in the lifetime. This paper deals with the lifetime calculations of a pressure and a non-pressure corrugated pipe considering the soil loads acting on pipes when they are buried. In the simulation of the pressure pipe, a combination of loads is applied that consists of internal pressure, residual stress and the soil loads. The influence of the loads is discussed. The non-pressure corrugated pipe is loaded by the soil loads only.
Permanent Link: http://hdl.handle.net/11104/0311631