EN IEC 60793-1-31:2019

Optical fibres - Part 1-31: Measurement methods and test procedures - Tensile strength

This part of IEC 60793 provides values of the tensile strength under dynamic loading of optical fibre samples. The method tests individual lengths of uncabled and unbundled glass optical fibre. Sections of fibre are broken with controlled increasing stress or strain that is uniform over the entire fibre length and cross section. The stress or strain is increased at a nominally constant rate until breakage occurs. The distribution of the tensile strength values of a given fibre strongly depends on the sample length, loading velocity and environmental conditions. The test can be used for inspection where statistical data on fibre strength is required. Results are reported by means of statistical quality control distribution. Normally, the test is carried out after temperature and humidity conditioning of the sample. However, in some cases, it can be sufficient to measure the values at ambient temperature and humidity conditions. This method is applicable to categories A1, A2, and A3, and classes B and C optical fibres. The object of this document is to establish uniform requirements for the mechanical characteristic: tensile strength.

Lichtwellenleiter - Teil 1-31: Messmethoden und Prüfverfahren - Zugfestigkeit

Fibres optiques - Partie 1-31: Méthodes de mesure et procédures d’essai - Résistance à la traction

IEC 60793-1-31:2019 donne les valeurs de résistance à la traction des échantillons de fibre optique, soumis à une charge dynamique. Cette méthode soumet à essai des longueurs individuelles de fibre optique en verre, non câblées et non groupées en faisceau. Des sections de fibre sont rompues en les soumettant à une contrainte ou une déformation croissante et contrôlée, uniforme sur toute la longueur et la section transversale de la fibre. La contrainte ou la déformation augmente à une vitesse nominalement constante jusqu’à ce que la rupture se produise. La distribution des valeurs de résistance à la traction pour une fibre donnée dépend étroitement de la longueur des échantillons, de la vitesse d’application de la force et des conditions d’environnement. L’essai peut s’appliquer à titre d’examen lorsque des données statistiques sur la résistance des fibres sont exigées. Les résultats sont déclarés sous forme d’une distribution statistique de contrôle de qualité. Habituellement, l’essai est réalisé après un conditionnement en température et en humidité de l’échantillon. Cependant, dans certains cas, la mesure des valeurs à la température et à l’humidité ambiantes peut être suffisante. Cette méthode s’applique aux fibres optiques de catégories A1, A2 et A3, et de classes B et C. L’objet du présent document est de déterminer des exigences uniformes relatives à la caractéristique mécanique: la résistance à la traction. Cette troisième édition annule et remplace la deuxième édition parue en 2010. Cette édition constitue une révision technique. Cette édition inclut les modifications suivantes par rapport à l’édition précédente: a) correction des Formules (3b) et (4b) et renumérotation des formules. Mots clés : résistance à la traction des échantillons de fibre optique

Optična vlakna - 1-31. del: Metode merjenja in preskusni postopki - Natezna trdnost (IEC 60793-1-31:2019)

Ta del standarda IEC 60793 podaja vrednosti natezne trdnosti pri dinamični obremenitvi vzorcev optičnih vlaken. Metoda preskuša posamezne dolžine nevezanih in ločenih steklenih optičnih vlaken. Odseke vlaken se poskuša prelomiti z nadzorovano naraščajočo napetostjo ali obremenitvijo, ki je enakomerna po celotni dolžini in preseku vlaken. Napetost ali obremenitev se povečujeta pri nominalno konstantni hitrosti, dokler se vlakno ne zlomi.
Porazdelitev vrednosti natezne trdnosti določenega vlakna je zelo odvisna od dolžine vzorca, hitrosti obremenjevanja in okoljskih pogojev. Preskus je mogoče uporabiti v primerih, kjer so potrebni statistični podatki o trdnosti vlaken. Rezultati so opisani s pomočjo statistične porazdelitve v sklopu nadzora kakovosti. Običajno se preskus opravi po obdelavi vzorca pri izbrani temperaturi in vlažnosti. V nekaterih primerih pa je lahko dovolj, da se izmerijo vrednosti pri sobni temperaturi in vlažnosti.
Ta metoda se uporablja za kategorije optičnih vlaken A1, A2 in A3 ter razreda B in C. Cilj tega dokumenta je vzpostaviti enotne zahteve za mehansko lastnost – natezno trdnost.

General Information

• Status: Published
• Publication Date: 04-Apr-2019
• Withdrawal Date: 12-Mar-2022
• ICS: 33.180.10 - Fibres and cables
• Technical Committee: CLC/TC 86A - Optical fibres and optical fibre cables
• Drafting Committee: IEC/SC 86A - IEC_SC_86A
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 05-Apr-2019
• Completion Date: 05-Apr-2019
• Ref Project: SIST EN IEC 60793-1-31:2019 - Optical fibres - Part 1-31: Measurement methods and test procedures - Tensile strength (IEC 60793-1-31:2019)

Relations

• Replaces: EN 60793-1-31:2010 - Optical fibres - Part 1-31: Measurement methods and test procedures - Tensile strength
• Effective Date: 12-Apr-2019

Standards Content (Sample)

SLOVENSKI STANDARD
01-junij-2019
Nadomešča:
SIST EN 60793-1-31:2010
Optična vlakna - 1-31. del: Metode merjenja in preskusni postopki - Natezna
trdnost (IEC 60793-1-31:2019)
Optical fibres - Part 1-31: Measurement methods and test procedures - Tensile strength
(IEC 60793-1-31:2019)
Lichtwellenleiter - Teil 1-31: Messmethoden und Prüfverfahren - Zugfestigkeit (IEC
60793-1-31:2019)
Fibres optiques - Partie 1-31 : Méthodes de mesure et procédures d’essai - Résistance à
la traction (IEC 60793-1-31:2019)
Ta slovenski standard je istoveten z: EN IEC 60793-1-31:2019
ICS:
33.180.10 (Optična) vlakna in kabli Fibres and cables
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 60793-1-31

NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2019
ICS 33.180.10 Supersedes EN 60793-1-31:2010
English Version
Optical fibres - Part 1-31: Measurement methods and test
procedures - Tensile strength
(IEC 60793-1-31:2019)
Fibres optiques - Partie 1-31: Méthodes de mesure et Lichtwellenleiter - Teil 1-31: Messmethoden und
procédures d'essai - Résistance à la traction Prüfverfahren - Zugfestigkeit
(IEC 60793-1-31:2019) (IEC 60793-1-31:2019)
This European Standard was approved by CENELEC on 2019-03-13. CENELEC 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 CENELEC 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 CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden,
Switzerland, Turkey and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2019 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 60793-1-31:2019 E

European foreword
The text of document 86A/1908/FDIS, future edition 3 of IEC 60793-1-31, prepared by SC 86A "Fibres
and cables" of IEC/TC 86 "Fibre optics" was submitted to the IEC-CENELEC parallel vote and
approved by CENELEC as EN IEC 60793-1-31:2019.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2019-12-13
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2022-03-13
document have to be withdrawn
This document supersedes EN 60793-1-31:2010.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.

Endorsement notice
The text of the International Standard IEC 60793-1-31:2019 was approved by CENELEC as a
European Standard without any modification.

In the official version, for Bibliography, the following notes have to be added for the standards
indicated:
IEC 60793-1-21:2001 NOTE Harmonized as EN 60793-1-21:2002 (not modified)
IEC 60793-2-10:2017 NOTE Harmonized as EN 60793-2-10:2017 (not modified)
IEC 60793-2-20:2015 NOTE Harmonized as EN 60793-2-20:2016 (not modified)
IEC 60793-2-30:2015 NOTE Harmonized as EN 60793-2-30:2015 (not modified)
IEC 60793-2-40:2015 NOTE Harmonized as EN 60793-2-40:2016 (not modified)
IEC 60793-2-50:2015 NOTE Harmonized as EN 60793-2-50:2016 (not modified)
IEC 61649:2008 NOTE Harmonized as EN 61649:2008 (not modified)

Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
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.
NOTE 1  Where an International Publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
NOTE 2  Up-to-date information on the latest versions of the European Standards listed in this annex is available here:
www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 60793-1-20 -  Optical fibres - Part 1-20: Measurement EN 60793-1-20 -
methods and test procedures - Fibre geometry

IEC 60793-1-31 ®
Edition 3.0 2019-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Optical fibres –
Part 1-31: Measurement methods and test procedures –Tensile strength

Fibres optiques –
Partie 1-31: Méthodes de mesure et procédures d’essai –Résistance à la traction

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.180.10 ISBN 978-2-8322-6529-1

– 2 – IEC 60793-1-31:2019 © IEC 2019
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 7
4 Hazards . 7
5 Apparatus . 8
5.1 General . 8
5.2 Gripping the fibre at both ends . 8
5.3 Sample support . 8
5.4 Stretching the fibre . 8
5.5 Measuring the force at failure . 9
5.6 Environmental control equipment . 9
6 Sample preparation . 10
6.1 Definition . 10
6.2 Sample size and gauge length . 10
6.3 Auxiliary measurements . 11
6.4 Environment . 11
7 Procedure . 11
7.1 Preliminary steps . 11
7.2 Procedure for a single specimen . 11
7.3 Procedure for completing all samples for a given nominal strain rate . 12
8 Calculations . 12
8.1 Conversion of tensile load to failure stress . 12
8.2 Preparation of a Weibull plot . 13
8.3 Computation of Weibull parameters . 13
9 Results . 14
9.1 Details to be reported . 14
9.2 Details to be recorded . 15
10 Specification information . 15
Annex A (informative) Typical testing apparatus of tensile strength under dynamic
loading . 16
Annex B (informative) Guidelines on gripping the fibre . 18
Annex C (informative) Guidelines on stress rate . 22
Bibliography . 24

Figure 1 – Bimodal tensile strength Weibull plot for a 20 m gauge length test set-up at
5 %/min strain rate . 10
Figure A.1 – Capstan design . 16
Figure A.2 – Translation test apparatus . 16
Figure A.3 – Rotating capstan apparatus . 17
Figure A.4 – Rotating capstan apparatus for long lengths . 17
Figure A.5 – Ganged rotating capstan tester . 17
Figure B.1 – Gradual slippage. 18

IEC 60793-1-31:2019 © IEC 2019 – 3 –
Figure B.2 – Irregular slippage . 18
Figure B.3 – Sawtooth slippage . 19
Figure B.4 – Acceptable transfer function . 19
Figure B.5 – Typical capstan . 20
Figure B.6 – Isostatic compression . 20
Figure B.7 – Escargot wrap . 21
Figure C.1 – System to control stress rate . 22
Figure C.2 – Time variation of load and loading speed . 23

– 4 – IEC 60793-1-31:2019 © IEC 2019
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
OPTICAL FIBRES –
Part 1-31: Measurement methods and test procedures –
Tensile strength
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as "IEC
Publication(s)"). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National
...