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The effect of residual stress on polymer pipe lifetime
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SYSNO ASEP 0398709 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title The effect of residual stress on polymer pipe lifetime Author(s) Hutař, Pavel (UFM-A) RID, ORCID
Ševčík, Martin (UFM-A) RID
Frank, A. (AT)
Náhlík, Luboš (UFM-A) RID, ORCID
Kučera, J. (CZ)
Pinter, G. (AT)Number of authors 6 Source Title Engineering Fracture Mechanics. - : Elsevier - ISSN 0013-7944
Roč. 108, SI (2013), s. 98-108Number of pages 11 s. Action Crack paths 2012 Event date 19.09.2012-21.09.2012 VEvent location Gaeta Country IT - Italy Event type WRD Language eng - English Country GB - United Kingdom Keywords Residual stress ; Linear elastic fracture mechanics ; Lifetime estimation ; Polyethylene pipes ; Slow crack growth Subject RIV JL - Materials Fatigue, Friction Mechanics R&D Projects GAP108/12/1560 GA ČR - Czech Science Foundation (CSF) ED1.1.00/02.0068 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) EE2.3.30.0063 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support UFM-A - RVO:68081723 UT WOS 000323868500009 DOI 10.1016/j.engfracmech.2013.04.014 Annotation This paper presents a quick methodology to assess the lifetime of an internally and externally pressurized polymer pipe using linear elastic fracture mechanics. The non-homogenous distribution of residual stress induced by production technology is incorporated into the numerical model of the cracked pipe. The stress intensity factor of the axially oriented crack growing from the inner surface through the pipe wall is estimated and combined with experimentally determined creep crack growth kinetics used for lifetime assessment. Major parameters affecting the pipe’s lifetime are identified and discussed. A simplified equation for estimation of the stress intensity factor value, removing the need for complicated finite element simulation, is then proposed. The combination of the creep crack growth tests and the approach presented can be a very powerful tool for reliable lifetime estimation of plastic pipes. Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2014
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