Publication detail
Lifetime calculation of soil-loaded non-pressure polymer pipes
PODUŠKA, J. HUTAŘ, P. FRANK, A. PINTER, G. NÁHLÍK, L.
English title
Lifetime calculation of soil-loaded non-pressure polymer pipes
Type
journal article in Scopus
Language
en
Original abstract
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.
English abstract
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.
Keywords in English
Finite element simulation; Lifetime; Non-pressure pipe; Plastic pressure pipe; Slow crack growth; Soil load
Released
02.12.2019
Publisher
Trans Tech Publications Ltd
Location
Switzerland
ISSN
1013-9826
Volume
827
Number
2020
Pages from–to
141–146
Pages count
6
BIBTEX
@article{BUT177243,
author="Jan {Poduška} and Pavel {Hutař} and Andreas {Frank} and Gerald {Pinter} and Luboš {Náhlík},
title="Lifetime calculation of soil-loaded non-pressure polymer pipes",
year="2019",
volume="827",
number="2020",
month="December",
pages="141--146",
publisher="Trans Tech Publications Ltd",
address="Switzerland",
issn="1013-9826"
}