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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
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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
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
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