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"
}