Geosynthetics - Test method for the determination of the strain hardening modulus of PE-HD geosynthetic barriers

This document specifies a test method for the measurement of the strain hardening modulus which is used as a measure for the resistance to slow crack growth of polyethylene. The strain hardening modulus is obtained from true stress versus draw ratio curves on PE-HD geosynthetic barrier samples.
This standard specifies how measurement is performed and how the strain hardening modulus is determined. Details of the required equipment, precision and sample preparations are given.
This test method is suitable for all PE-HD types of GBR-P.

Geokunststoffe - Prüfverfahren für die Bestimmung des Dehnverfestigungsmoduls von PE-HD-Dichtungsbahnen

Dieses Dokument legt ein Prüfverfahren für die Messung des Kaltverfestigungsmoduls fest, der als Messwert für den Widerstand von Polyethylen gegen langsame Rissbildung verwendet wird. Der Kaltverfestigungs¬modul wird anhand tatsächlicher Spannungszugverhältniskurven anhand von Proben geosynthetischer Dichtungsbahnen aus PE HD ermittelt.
Diese Norm legt die Durchführung der Messungen und die Bestimmung des Kaltverfestigungsmoduls fest. Die Norm enthält ausführliche Informationen zu Geräten, Genauigkeit und der Probenvorbereitung.
Das Prüfverfahren ist für sämtliche PE HD Arten von GBR P geeignet.

Géosynthétiques - Méthode d'essai pour la détermination du module d'écrouissage des Géomembranes HDPE

La présente norme décrit une méthode d’essai pour la mesure du module d'écrouissage, lequel est utilisé pour mesurer la résistance à la propagation lente des fissures dans le polyéthylène. Le module d'écrouissage est obtenu à partir des courbes de contrainte vraie en fonction du taux d'étirage, sur des échantillons de géomembranes en PEHD.
La présente norme décrit comment est réalisée la mesure et la manière dont est déterminé le module d'écrouissage. Le présent document fournit des détails sur l'équipement nécessaire, la précision et la préparation des éprouvettes.
La méthode est valable pour tous les types de polyéthylène et les géomembranes polymériques GMB-P.

Geosintetika - Preskusna metoda za ugotavljanje utrjevanja modula HDPE geosintetičnih ovir

Ta dokument določa preskusno metodo za ugotavljanje utrjevanja modula, ki se
uporablja kot merilo za odpornost na počasno širjenje razpoke v polietilenu. Ugotavljanje utrjevanja modula se pridobi iz razmerja krivulje dejanske obremenitve in razmerja izvleka na vzorcih geosintetičnih ovir PE-HD. Ta standard določa način izvajanja meritve in določanja utrjevanja modula. Navedeni so podatki o potrebni opremi, natančnosti in pripravi vzorcev.
Ta preskusna metoda je primerna za vse vrste modula PE-HD GBR-P.

General Information

Status
Published
Publication Date
27-Nov-2018
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Due Date
28-Nov-2018
Completion Date
28-Nov-2018

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SLOVENSKI STANDARD
SIST EN 17096:2019
01-februar-2019
*HRVLQWHWLND3UHVNXVQDPHWRGD]DXJRWDYOMDQMHXWUMHYDQMDPRGXOD+'3(
JHRVLQWHWLþQLKRYLU

Geosynthetics - Test method for the determination of the strain hardening modulus of

HDPE geosynthetic barriers
Geokunststoffe - Prüfverfahren für die Bestimmung des Kaltverfestigungsmodus von
HDPE-Kunststoffdichtungsbahnen

Géosynthétiques - Méthode d'essai pour la détermination du module d'écrouissage des

Géomembranes HDPE-HD
Ta slovenski standard je istoveten z: EN 17096:2018
ICS:
59.080.70 Geotekstilije Geotextiles
SIST EN 17096:2019 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 17096:2019
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SIST EN 17096:2019
EN 17096
EUROPEAN STANDARD
NORME EUROPÉENNE
November 2018
EUROPÄISCHE NORM
ICS 59.080.70
English Version
Geosynthetics - Test method for the determination of the
strain hardening modulus of PE-HD geosynthetic barriers

Géosynthétiques - Méthode d'essai pour la Geokunststoffe - Prüfverfahren für die Bestimmung des

détermination du module d'écrouissage des Dehnverfestigungsmodul von HDPE-
Géomembranes HDPE Kunststoffdichtungsbahnen
This European Standard was approved by CEN on 15 July 2018.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this

European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references

concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN

member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by

translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management

Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,

Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2018 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 17096:2018 E

worldwide for CEN national Members.
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SIST EN 17096:2019
EN 17096:2018 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

1 Scope .................................................................................................................................................................... 4

2 Normative references .................................................................................................................................... 4

3 Terms and definitions ................................................................................................................................... 4

4 Principle ............................................................................................................................................................. 6

5 Apparatus ........................................................................................................................................................... 6

5.1 Tensile-testing machine ............................................................................................................................... 6

5.2 Devices for measuring the thickness and width of the test specimens ....................................... 7

5.3 Punch die tool ................................................................................................................................................... 7

5.4 Device for application of the gauge marks ............................................................................................. 7

6 Test specimen ................................................................................................................................................... 7

6.1 Dimensions and figure of the test specimen ......................................................................................... 7

6.2 Test specimen preparation.......................................................................................................................... 8

7 Test procedure ................................................................................................................................................. 8

8 Calculation ......................................................................................................................................................... 9

9 Test report ......................................................................................................................................................... 9

Annex A (informative) Neo-Hookean constitutive model ............................................................................. 11

Bibliography ................................................................................................................................................................. 13

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SIST EN 17096:2019
EN 17096:2018 (E)
European foreword

This document (EN 17096:2018) has been prepared by Technical Committee CEN/TC 189

“Geosynthetics”, the secretariat of which is held by NBN.

This European Standard shall be given the status of a national standard, either by publication of an

identical text or by endorsement, at the latest by May 2019, and conflicting national standards shall be

withdrawn at the latest by May 2019.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CEN shall not be held responsible for identifying any or all such patent rights.

According to the CEN-CENELEC Internal Regulations, the national standards organisations of the

following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,

Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,

France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,

Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and the United Kingdom.
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SIST EN 17096:2019
EN 17096:2018 (E)
1 Scope

This document specifies a test method for the measurement of the strain hardening modulus which is

used as a measure for the resistance to slow crack growth of polyethylene. The strain hardening

modulus is obtained from true stress versus draw ratio curves on PE-HD geosynthetic barrier samples.

This standard specifies how measurement is performed and how the strain hardening modulus is

determined. Details of the required equipment, precision and sample preparations are given.

This test method is suitable for all PE-HD types of GBR-P.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments) applies.

EN 1849-2:2009, Flexible sheets for waterproofing - Determination of thickness and mass per unit area -

Part 2: Plastic and rubber sheets

EN ISO 9863-1:2016, Geosynthetics - Determination of thickness at specified pressures - Part 1: Single

layers (ISO 9863-1:2016)

EN ISO 527-1, Plastics - Determination of tensile properties - Part 1: General principles (ISO 527-1)

EN ISO 7500-1, Metallic materials - Calibration and verification of static uniaxial testing machines - Part

1: Tension/compression testing machines - Calibration and verification of the force-measuring system (ISO

7500-1)

EN ISO 9513, Metallic materials - Calibration of extensometer systems used in uniaxial testing (ISO 9513)

3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

Note 1 to entry: The symbols, their terms and definitions, as given below, are in line with EN ISO 527-1 and/or

ISO 18488.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1
gauge length

initial distance between the gauge marks on the central part of the test specimen

Note 1 to entry: Gauge length is expressed in mm.
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SIST EN 17096:2019
EN 17096:2018 (E)
3.2
thickness

initial dimension of the cross-section perpendicular to the plane in the central part of a test specimen

Note 1 to entry: Thickness is expressed in mm.
3.3
width
initial dimension of the cross-section in the central part of a test specimen
Note 1 to entry: Width is expressed in mm.
3.4
test speed
rate of separation of the gripping jaws
Note 1 to entry: Test speed is expressed in mm/min.
3.5
length

distance between the gauge marks on the central part of the test specimen at any given moment

Note 1 to entry: Length is expressed in mm.
3.6
stress
𝜎𝜎
normal force per unit area of the original cross-section within the gauge length
Note 1 to entry: Stress is expressed in MPa.
3.7
yield stress
𝜎𝜎
stress at the strain at yield
Note 1 to entry: Stress at yield is expressed in MPa.
3.8
true stress
𝜎𝜎

draw ratio multiplied with the normal force per unit area of the original cross-section within the gauge

length
Note 1 to entry: True stress is expressed in MPa.
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SIST EN 17096:2019
EN 17096:2018 (E)
3.9
strain
𝜀𝜀
increase in length per unit original length of the gauge
Note 1 to entry: Strain is expressed as a percentage (%).
3.10
strain at yield
𝜀𝜀
first occurrence in a tensile test of strain increase without a stress increase
Note 1 to entry: Strain at yield is expressed as a percentage (%).
3.11
draw ratio
actual length per unit original length of the gauge
Note 1 to entry: Draw ratio at yield is expressed as a dimensionless ratio.
3.12
strain hardening modulus

slope of the Neo-Hookean constitutive model between a draw ratio of 8 and up to the point of maximum

stress but not above 12
Note 1 to entry: Strain hardening modulus is expressed in MPa.
3.13
variation coefficient

standard deviation of the test results divided by the arithmetic mean of the test results multiplied by

100
Note 1 to entry: Variation coefficient is expressed
...

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