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Pressure pipe damage: Numerical estimation of point load effect
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SYSNO ASEP 0485029 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Pressure pipe damage: Numerical estimation of point load effect Author(s) Zouhar, Michal (UFM-A)
Hutař, Pavel (UFM-A) RID, ORCID
Ševčík, Martin (UFM-A) RID
Náhlík, Luboš (UFM-A) RID, ORCIDNumber of authors 4 Source Title Advances in Fracture and Damage Mechanics XI. - Zurich : Trans Tech Publications, 2013 / Qingfen L. ; Yulong L. ; Aliabadi M.H. - ISSN 1013-9826 - ISBN 978-3-03785-463-1 Pages roč. 525-526 (2013), s. 177-180 Series Key Engineering Materials Number of pages 4 s. Publication form Print - P Action FDM 2012 - International Conference on Fracture and Damage Mechanics /11./ Event date 12.09.2012-18.09.2012 VEvent location Xian Country CN - China Event type WRD Language eng - English Country CH - Switzerland Keywords slow crack-growth ; failure ; polymer pressure pipes ; point load ; stress intensity factor ; crack shape prediction Subject RIV JL - Materials Fatigue, Friction Mechanics OECD category Audio engineering, reliability analysis R&D Projects GAP108/12/1560 GA ČR - Czech Science Foundation (CSF) GD106/09/H035 GA ČR - Czech Science Foundation (CSF) Institutional support UFM-A - RVO:68081723 UT WOS 000315543300045 EID SCOPUS 84870334184 DOI 10.4028/www.scientific.net/KEM.525-526.177 Annotation The most relevant loading conditions for real polymer pipe systems are not only internal pressure, but also loading caused by sand embedding including bending or different kinds of point loads. It has been shown that service lifetime of buried pipes can be reduced especially due to stress concentration caused by external point loads. If the pipe is loaded locally the stress is concentrated here and a crack can initiate at this position or the existing crack can be affected by corresponding stress redistribution. In the paper the effect of the hard indenter, Poisson's ratio, hoop stress level and pipe wall thickness on the crack shape was estimated using numerical simulations of the creep crack propagation based on finite element method. Relation between crack length and crack width was found and expressed by simple relationship. A deeper understanding of the point load effect in order to prevent unexpected failure of the pipelines is of paramount importance for pipeline design. Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2018
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