Fracture Mechanics Lifetime Prediction of Polyethylene Pipes
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F19%3A00511843" target="_blank" >RIV/68081723:_____/19:00511843 - isvavai.cz</a>
Result on the web
<a href="https://ascelibrary.org/doi/full/10.1061/%28ASCE%29PS.1949-1204.0000356" target="_blank" >https://ascelibrary.org/doi/full/10.1061/%28ASCE%29PS.1949-1204.0000356</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1061/(ASCE)PS.1949-1204.0000356" target="_blank" >10.1061/(ASCE)PS.1949-1204.0000356</a>
Alternative languages
Result language
angličtina
Original language name
Fracture Mechanics Lifetime Prediction of Polyethylene Pipes
Original language description
Polyethylene pressure pipes are designed for service lives of at least 50 years. While so far lifetimes have been assessed by pipe pressure testsdue to improved slow crack growth (SCG) resistance and increased testing times such tests are not suitable anymore for modern pipe grades. The paper presents an alternative methodology for lifetime prediction combining practical advantages of the cyclic cracked round bar (CRB) test and linear elastic fracture mechanics. A major advantage of this procedure is that material characterization is done at ambient temperatures. The key challenge in this context is to measure SCG rates in CRB specimens. After determination of crack kinetics at different dynamic loading ratiosmaterial laws for SCG at static loading are extrapolated. Based on the stress intensity factor concept and realistic considerations of initial defect size and changing crack front geometry pipe lifetimes of four different PE pipe grades are predicted. The results show that for all materials the required minimum lifetime of 50 years will be reached and under practical assumptions even 100 years will be exceeded. (C) 2018 American Society of Civil Engineers.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20306 - Audio engineering, reliability analysis
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Pipeline Systems Engineering and Practice
ISSN
1949-1190
e-ISSN
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Volume of the periodical
10
Issue of the periodical within the volume
1
Country of publishing house
US - UNITED STATES
Number of pages
14
Pages from-to
04018030
UT code for WoS article
000453216800009
EID of the result in the Scopus database
2-s2.0-85055949411