Publication detail
A numerical methodology for lifetime estimation of HDPE pressure pipes
HUTAŘ, P. ŠEVČÍK, M. NÁHLÍK, L. PINTER, G. FRANK, A. MITEV, I.
Czech title
Numerický postup odhadu životnosti tlakových potrubí z HDPE
English title
A numerical methodology for lifetime estimation of HDPE pressure pipes
Type
journal article - other
Language
en
Original abstract
Using linear elastic fracture mechanics a new methodology for a lifetime assessment of internally pressurized polymer pipes was developed. The concept is based on the numerical calculation of stress intensity factors for pipes under different loading conditions in combination with experimentally determined creep crack growth kinetics. Comparison of simulated lifetimes with experimental data from tests of internally pressurized pipes proved the principal applicability of the concept suggested. Major parameters affecting the pipe lifetime are identified and discussed. Combination of the creep crack growth tests and numerical simulations can be a very powerful tool for lifetime estimation of plastic pipes under different loading conditions.
Czech abstract
V práci je navržen postup odhadu živostnosti polymerního potrubí využitím lineárně elastické lomové mechaniky. Práce obsahuje přibližný vztah pro určení součinitele intenzity napětí pro poloeliptickou trhlinu, iniciující se na vnitřní stěně potrubí. Trhlina je orientována axiálně. V navržených vztazích je uvažována změna tvaru trhliny v závislosti na její délce. Výsledná životnost je dále srovnána s experimentálními údaji, přičemž je konstatována dobrá shoda.
English abstract
Using linear elastic fracture mechanics a new methodology for a lifetime assessment of internally pressurized polymer pipes was developed. The concept is based on the numerical calculation of stress intensity factors for pipes under different loading conditions in combination with experimentally determined creep crack growth kinetics. Comparison of simulated lifetimes with experimental data from tests of internally pressurized pipes proved the principal applicability of the concept suggested. Major parameters affecting the pipe lifetime are identified and discussed. Combination of the creep crack growth tests and numerical simulations can be a very powerful tool for lifetime estimation of plastic pipes under different loading conditions.
Keywords in Czech
čas do porušení; lomová mechanika; PE potrubí; růst creepové trhliny; odhad životnosti
Keywords in English
time to failure curve; fracture mechanics; PE pipes; creep crack growth; lifetime estimation
RIV year
2011
Released
17.12.2011
Publisher
Elsevier
ISSN
0013-7944
Volume
78
Number
17
Pages from–to
3049–3058
Pages count
10
BIBTEX
@article{BUT74248,
author="Pavel {Hutař} and Martin {Ševčík} and Luboš {Náhlík} and Gerald {Pinter} and Andreas {Frank} and Ivaylo {Mitev},
title="A numerical methodology for lifetime estimation of HDPE pressure pipes",
year="2011",
volume="78",
number="17",
month="December",
pages="3049--3058",
publisher="Elsevier",
issn="0013-7944"
}