About: Lifetime prediction of HDPE pipes grade

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	This paper presents the results of notch tests on single edge notch specimen under condition corresponding to the PENT approach, i.e. at temperature 80°C and nominal stress 2,4 MPa. Tests were performed for one monomodal and two bimodal HDPE materials, both from structural and fracture mechanics point of view. The dependence of a crack opening displacement COD vs. time was measured and the values of the rate of the stable crack growth rate da/dt and time to fracture tf were estimated. To estimate the residual life of pipes the finite element model with an initial defect was suggested and the values of the stress intensity factor K have been calculated. The computation took into account the change of the crack shape during its growth in the pipe. For assessment of the residual service life of pipes the relation da/dt = A (K)m was applied. The values of the pipe life-time for three studied materials are compared and diagram of the hoop stress versus failure time is presented. This paper presents the results of notch tests on single edge notch specimen under condition corresponding to the PENT approach, i.e. at temperature 80°C and nominal stress 2,4 MPa. Tests were performed for one monomodal and two bimodal HDPE materials, both from structural and fracture mechanics point of view. The dependence of a crack opening displacement COD vs. time was measured and the values of the rate of the stable crack growth rate da/dt and time to fracture tf were estimated. To estimate the residual life of pipes the finite element model with an initial defect was suggested and the values of the stress intensity factor K have been calculated. The computation took into account the change of the crack shape during its growth in the pipe. For assessment of the residual service life of pipes the relation da/dt = A (K)m was applied. The values of the pipe life-time for three studied materials are compared and diagram of the hoop stress versus failure time is presented. (en)
Title	Lifetime prediction of HDPE pipes grade Lifetime prediction of HDPE pipes grade (en)
skos:prefLabel	Lifetime prediction of HDPE pipes grade Lifetime prediction of HDPE pipes grade (en)
skos:notation	RIV/68081723:_____/10:00354108!RIV11-GA0-68081723
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(GA106/08/1409), P(GA106/09/0279), P(GC101/09/J027), Z(AV0Z20410507)
http://linked.open...vai/riv/dodaniDat	2011
http://linked.open...aciTvurceVysledku	Knésl, Zdeněk Náhlík, Luboš Hutař, Pavel Ševčík, Martin
http://linked.open.../riv/druhVysledku	D - Článek ve sborníku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Ústav fyziky materiálů AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	268484
http://linked.open...ai/riv/idVysledku	RIV/68081723:_____/10:00354108
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	HDPE; creep crack; time to rupture curve; PENT test; pipe failure (en)
http://linked.open.../riv/klicoveSlovo	HDPE creep crack PENT test pipe failure time to rupture curve
http://linked.open...ontrolniKodProRIV	[D39597BC347F]
http://linked.open...v/mistoKonaniAkce	Dresden
http://linked.open...i/riv/mistoVydani	Berlin
http://linked.open...i/riv/nazevZdroje	European Conference on Fracture
http://linked.open...in/vavai/riv/obor	JL
http://linked.open...ichTvurcuVysledku	4 (xsd:int)
http://linked.open...cetTvurcuVysledku	5 (xsd:int)
http://linked.open...vavai/riv/projekt	Fracture damage mechanism of multilayer polymer body Correlation between structural changes, damage evolution and crack propagation behaviour of welded thermoplastics components Role of structure of crosslinked polymer matrix in particulate composites. Multiscale modeling and experimental verification.
http://linked.open...UplatneniVysledku	2010
http://linked.open...iv/tvurceVysledku	Hutař, Pavel Knésl, Zdeněk Náhlík, Luboš Ševčík, Martin Nezbedová, E.
http://linked.open...vavai/riv/typAkce	WRD - Světová
http://linked.open.../riv/zahajeniAkce	2010-08-30 (xsd:date)
http://linked.open...n/vavai/riv/zamer	Physical properties of advanced materials in relation to their microstructure and processing
number of pages	9 (xsd:int)
http://purl.org/ne...btex#hasPublisher	Deutscher Verband fur Materialforschung und prufung e.V
https://schema.org/isbn	978-3-00-031802-3

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