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Statements

Subject Item
n2:RIV%2F68081723%3A_____%2F13%3A00398693%21RIV14-MSM-68081723
rdf:type
n8:Vysledek skos:Concept
dcterms:description
The failure mode termed long time brittle failure (due to slow crack growth – SCG) limits the lifetime of plastic pipes. There are now two main accelerated tests (PENT and FNCT) that enable us to estimate the lifetime of HDPE used in plastics pipes. For unimodal grades, the time to failure corresponding to these accelerated tests is about ten hours, for bimodal grade PE 100 it is roughly a thousand hours and for the new PE 100 RC grade is greater than 1 year. For the HDPE pipes grade with higher resistance against SCG, some modification or, alternatively, new tests should be developed that make it possible even for these materials to obtain the results required in a relatively short time. In this contribution we focus mainly on the PENT test and the possibility of the utilization of a structural analysis as well as a numerical approach for prediction of the lifetime of a new generation of PE grades. The failure mode termed long time brittle failure (due to slow crack growth – SCG) limits the lifetime of plastic pipes. There are now two main accelerated tests (PENT and FNCT) that enable us to estimate the lifetime of HDPE used in plastics pipes. For unimodal grades, the time to failure corresponding to these accelerated tests is about ten hours, for bimodal grade PE 100 it is roughly a thousand hours and for the new PE 100 RC grade is greater than 1 year. For the HDPE pipes grade with higher resistance against SCG, some modification or, alternatively, new tests should be developed that make it possible even for these materials to obtain the results required in a relatively short time. In this contribution we focus mainly on the PENT test and the possibility of the utilization of a structural analysis as well as a numerical approach for prediction of the lifetime of a new generation of PE grades.
dcterms:title
The applicability of the Pennsylvania Notch Test for a new generation of PE pipe grades The applicability of the Pennsylvania Notch Test for a new generation of PE pipe grades
skos:prefLabel
The applicability of the Pennsylvania Notch Test for a new generation of PE pipe grades The applicability of the Pennsylvania Notch Test for a new generation of PE pipe grades
skos:notation
RIV/68081723:_____/13:00398693!RIV14-MSM-68081723
n8:predkladatel
n12:ico%3A68081723
n3:aktivita
n14:I n14:P
n3:aktivity
I, P(ED1.1.00/02.0068), P(GAP108/12/1560)
n3:cisloPeriodika
1
n3:dodaniDat
n11:2014
n3:domaciTvurceVysledku
n4:6154557 n4:3875636 n4:9861807 n4:1161415
n3:druhVysledku
n17:J
n3:duvernostUdaju
n10:S
n3:entitaPredkladatele
n18:predkladatel
n3:idSjednocenehoVysledku
61666
n3:idVysledku
RIV/68081723:_____/13:00398693
n3:jazykVysledku
n19:eng
n3:klicovaSlova
PENT test; Lifetime prediction; HDPE; Slow crack growth; Fracture mechanics
n3:klicoveSlovo
n9:Slow%20crack%20growth n9:Fracture%20mechanics n9:Lifetime%20prediction n9:PENT%20test n9:HDPE
n3:kodStatuVydavatele
GB - Spojené království Velké Británie a Severního Irska
n3:kontrolniKodProRIV
[16F097F2287D]
n3:nazevZdroje
Polymer Testing
n3:obor
n13:JL
n3:pocetDomacichTvurcuVysledku
4
n3:pocetTvurcuVysledku
6
n3:projekt
n15:GAP108%2F12%2F1560 n15:ED1.1.00%2F02.0068
n3:rokUplatneniVysledku
n11:2013
n3:svazekPeriodika
32
n3:tvurceVysledku
Náhlík, Luboš Nezbedová, E. Hutař, Pavel Sadílek, J. Knésl, Zdeněk Zouhar, Michal
n3:wos
000314448100016
s:issn
0142-9418
s:numberOfPages
9
n7:doi
10.1016/j.polymertesting.2012.09.009