SIST EN ISO 527-5:2022

Plastics - Determination of tensile properties - Part 5: Test conditions for unidirectional fibre-reinforced plastic composites (ISO 527-5:2021)

This document specifies the test conditions for the determination of the tensile properties of
unidirectional fibre-reinforced plastic composites, based upon the general principles given in ISO 527-1.
NOTE Isotropic and orthotropic reinforced materials are covered by ISO 527-4.
The methods are used to investigate the tensile behaviour of the test specimens and for determining
the tensile strength, tensile modulus, Poisson's ratios and other aspects of the tensile stress-strain
relationship under the conditions defined.
The test method is suitable for all polymer matrix systems reinforced with unidirectional fibres and
which meet the requirements, including failure mode, set out in this document.
The method is suitable for composites with either thermoplastic or thermosetting matrices, including
preimpregnated materials (prepregs). The reinforcements covered include carbon fibres, glass fibres,
aramid fibres and other similar fibres. The reinforcement geometries covered include unidirectional
(i.e. completely aligned) fibres and rovings and unidirectional fabrics and tapes.
The method is not normally suitable for multidirectional materials composed of several unidirectional
layers at different angles (see ISO 527-4).

Kunststoffe - Bestimmung der Zugeigenschaften - Teil 5: Prüfbedingungen für unidirektional faserverstärkte Kunststoffverbundwerkstoffe (ISO 527-5:2021)

1.1 Dieser Teil von ISO 527 legt auf der Basis der allgemeinen Grundsätze aus Teil 1 dieser Norm die Prüfbedingungen für die Bestimmung der Zugeigenschaften unidirektional faserverstärkter Kunststoff-verbundwerkstoffe fest. 1.2 Die Verfahren werden verwendet, um das Zugverformungsverhalten von Probekörpern zu untersuchen und die Zugfestigkeit, den Zugmodul, die Poissonzahlen und andere Gesichtspunkte der Zugspannungs-Dehnungs-Beziehung unter festgelegten Bedingungen zu ermitteln. 1.3 Das Prüfverfahren ist für alle unidirektional faserverstärkten Polymermatrixsysteme geeignet, die den in diesem Teil von ISO 527 angegebenen Anforderungen, einschließlich Ausfallart, entsprechen. Das Verfahren ist geeignet für sowohl thermoplastische als auch duroplastische (wärmehärtbare) Verbundwerkstoffe, einschließlich vorimprägnierter Materialien (Prepregs). Die berücksichtigten Verstärkungen schließen Glasfasern, Kohlenstofffasern, Aramidfasern und andere ähnliche Fasern ein. Die Verstärkungsgeometrien umfassen unidirektionale (d. h. vollständig ausgerichtete) Fasern und Rovings und unidirektionale Gewebe und Bänder. Das Verfahren ist gewöhnlich nicht für multidirektionale Materialien geeignet, die aus mehreren unidirektionalen Schichten mit unterschiedlichen Winkeln bestehen (siehe ISO 527-4). 1.4 Das Verfahren wird durchgeführt, wenn einer der zwei verschiedenen Probekörpertypen verwendet wird, was von der Richtung der angewandten Spannung, bezogen auf die Faserrichtung, und von der Verwendung der Krafteinleitungselemente abhängig ist (siehe Abschnitt 6).

Plastiques - Détermination des propriétés en traction - Partie 5 : Conditions d'essai pour les composites plastiques renforcés de fibres unidirectionnelles (ISO 527-5:2021)

Le présent document spécifie les conditions d’essai pour la détermination des propriétés en traction des composites plastiques renforcés de fibres unidirectionnelles, basées sur les principes généraux établis dans l’ISO 527‑1.
NOTE       Les matériaux renforcés isotropes et orthotropes sont couverts par l’ISO 527‑4.
Les méthodes sont utilisées pour étudier le comportement en traction des éprouvettes et pour déterminer la résistance en traction, le module d’élasticité en traction, les coefficients de Poisson et d’autres aspects de la relation contrainte/déformation en traction dans les conditions définies.
La méthode d’essai convient à tous les systèmes de matrices polymères renforcées de fibres unidirectionnelles conformes aux exigences établies dans le présent document, y compris le mode de rupture.
La méthode convient à la fois aux composites à matrices thermoplastiques et thermodurcissables, y compris les matériaux préimprégnés (prepregs). Les renforts concernés comprennent les fibres de carbone, les fibres de verre, les fibres d’aramide et autres fibres similaires. La géométrie des renforts comprend les fibres ou stratifils unidirectionnels (c’est-à-dire parfaitement alignés) et les tissus et rubans unidirectionnels.
Normalement, la méthode ne convient pas aux matériaux multidirectionnels composés de plusieurs couches unidirectionnelles assemblées sous des angles différents (voir l’ISO 527-4).

Polimerni materiali - Ugotavljanje nateznih lastnosti - 5. del: Preskusni pogoji za enostransko z vlakni ojačene polimerne kompozite (ISO 527-5:2021)

Ta dokument določa preskusne pogoje za določanje nateznih lastnosti enostransko z vlakni ojačanih polimernih kompozitov na podlagi splošnih načel, opredeljenih v standardu ISO 527-1.
OPOMBA: Izotropno in ortotropno ojačani materiali so zajeti v standardu ISO 527-4.
Uporabljene so metode za preučevanje nateznih lastnosti preskušancev ter za ugotavljanje natezne trdnosti, nateznega modula, Poissonovega razmerja in drugih vidikov razmerja natezna napetost/deformacija pri določenih pogojih.
Preskusna metoda je primerna za vse polimerne matrične sisteme, enostransko ojačane z vlakni, ki izpolnjujejo zahteve, vključno z vrsto odpovedi, določeno v tem dokumentu.
Metoda je primerna za kompozite s termoplastičnimi ali termoreaktivnimi matricami, vključno s predhodno impregniranimi materiali. Zajete ojačitve vključujejo ogljikova vlakna, steklena vlakna, aramidna vlakna in druga podobna vlakna. Zajete geometrije ojačitve vključujejo enostranska (tj. popolnoma poravnana) vlakna in rovinge ter enostranske tkanine in trakove.
Metoda običajno ni primerna za večstranske materiale, sestavljene iz več enostranskih
plasti pod različnimi koti (glej ISO 527-4).

General Information

• Status: Published
• Public Enquiry End Date: 22-Sep-2020
• Publication Date: 23-Dec-2021
• ICS: 83.120 - Reinforced plastics
• Technical Committee: IPMA - Polimer materials and products
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 15-Dec-2021
• Due Date: 19-Feb-2022
• Completion Date: 24-Dec-2021
• Ref Project: EN ISO 527-5:2021 - Plastics - Determination of tensile properties - Part 5: Test conditions for unidirectional fibre-reinforced plastic composites (ISO 527-5:2021)

Relations

• Replaces: SIST EN ISO 527-5:2009 - Plastics - Determination of tensile properties - Part 5: Test conditions for unidirectional fibre-reinforced plastic composites (ISO 527-5:2009)
• Effective Date: 15-Dec-2021
• Replaces: SIST EN ISO 527-5:2009 - Plastics - Determination of tensile properties - Part 5: Test conditions for unidirectional fibre-reinforced plastic composites (ISO 527-5:2009)
• Effective Date: 08-Jun-2022

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN ISO 527-5:2022
01-februar-2022
Nadomešča:
SIST EN ISO 527-5:2009
Polimerni materiali - Ugotavljanje nateznih lastnosti - 5. del: Preskusni pogoji za
enostransko z vlakni ojačene polimerne kompozite (ISO 527-5:2021)
Plastics - Determination of tensile properties - Part 5: Test conditions for unidirectional
fibre-reinforced plastic composites (ISO 527-5:2021)
Kunststoffe - Bestimmung der Zugeigenschaften - Teil 5: Prüfbedingungen für
unidirektional faserverstärkte Kunststoffverbundwerkstoffe (ISO 527-5:2021)
Plastiques - Détermination des propriétés en traction - Partie 5 : Conditions d'essai pour
les composites plastiques renforcés de fibres unidirectionnelles (ISO 527-5:2021)
Ta slovenski standard je istoveten z: EN ISO 527-5:2021
ICS:
83.120 Ojačani polimeri Reinforced plastics
SIST EN ISO 527-5:2022 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN ISO 527-5:2022

---------------------- Page: 2 ----------------------
SIST EN ISO 527-5:2022


EN ISO 527-5
EUROPEAN STANDARD

NORME EUROPÉENNE

December 2021
EUROPÄISCHE NORM
ICS 83.120 Supersedes EN ISO 527-5:2009
English Version

Plastics - Determination of tensile properties - Part 5: Test
conditions for unidirectional fibre-reinforced plastic
composites (ISO 527-5:2021)
Plastiques - Détermination des propriétés en traction - Kunststoffe - Bestimmung der Zugeigenschaften - Teil
Partie 5 : Conditions d'essai pour les composites 5: Prüfbedingungen für unidirektional faserverstärkte
plastiques renforcés de fibres unidirectionnelles (ISO Kunststoffverbundwerkstoffe (ISO 527-5:2021)
527-5:2021)
This European Standard was approved by CEN on 4 October 2021.

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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, 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
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 527-5:2021 E
worldwide for CEN national Members.

---------------------- Page: 3 ----------------------
SIST EN ISO 527-5:2022
EN ISO 527-5:2021 (E)
Contents Page
European foreword . 3

2

---------------------- Page: 4 ----------------------
SIST EN ISO 527-5:2022
EN ISO 527-5:2021 (E)
European foreword
This document (EN ISO 527-5:2021) has been prepared by Technical Committee ISO/TC 61 "Plastics" in
collaboration with Technical Committee CEN/TC 249 “Plastics” 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 June 2022, and conflicting national standards shall be
withdrawn at the latest by June 2022.
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.
This document supersedes EN ISO 527-5:2009.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 527-5:2021 has been approved by CEN as EN ISO 527-5:2021 without any modification.

3

---------------------- Page: 5 ----------------------
SIST EN ISO 527-5:2022

---------------------- Page: 6 ----------------------
SIST EN ISO 527-5:2022
INTERNATIONAL ISO
STANDARD 527-5
Third edition
2021-11
Plastics — Determination of tensile
properties —
Part 5:
Test conditions for unidirectional
fibre-reinforced plastic composites
Plastiques — Détermination des propriétés en traction —
Partie 5: Conditions d'essai pour les composites plastiques renforcés
de fibres unidirectionnelles
Reference number
ISO 527-5:2021(E)
© ISO 2021

---------------------- Page: 7 ----------------------
SIST EN ISO 527-5:2022
ISO 527-5:2021(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2021
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
  © ISO 2021 – All rights reserved

---------------------- Page: 8 ----------------------
SIST EN ISO 527-5:2022
ISO 527-5:2021(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 5
5 Apparatus . 5
6 Test specimens . 5
6.1 Shape and dimensions . 5
6.1.1 General . 5
6.1.2 Type A specimen (for longitudinal direction) . 7
6.1.3 Type B specimen (for transverse direction) . 7
6.2 Preparation of specimens . 7
6.2.1 General . 7
6.2.2 End tabs . 7
6.2.3 Application of end tabs . 7
6.3 Gauge marks . 7
6.4 Checking the specimens . 7
7 Number of specimens . .8
8 Conditioning . 8
9 Procedure .8
9.1 Test atmosphere . 8
9.2 Measurement of specimen dimensions . 8
9.3 Clamping . 8
9.4 Prestresses . . 8
9.5 Setting of extensometers and strain gauges and placing of gauge marks . 8
9.6 Test speed . 8
9.7 Recording of data . 8
10 Calculation and expression of results . 8
10.1 Calculation of all properties for parallel sided specimens (Type A and B) . 8
11 Precision . 9
12 Test report . 9
Annex A (informative) Alignment of specimens .10
Annex B (informative) Use of unbonded tabs and conditions for gripping tab-less specimens
using fine grip faces .12
Annex C (normative) Specimen preparation for type A and type B .15
Bibliography .17
iii
© ISO 2021 – All rights reserved

---------------------- Page: 9 ----------------------
SIST EN ISO 527-5:2022
ISO 527-5:2021(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to
the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 13,
Composites and reinforcement fibres, in collaboration with the European Committee for Standardization
(CEN) Technical Committee CEN/TC 249, Plastics, in accordance with the Agreement on technical
cooperation between ISO and CEN (Vienna Agreement).
This third edition cancels and replaces the second edition (ISO 527-5:2009), which has been technically
revised. The main changes compared to the previous edition are as follows:
— gripping force or pressure (e.g. via torque or manometer depending on gripping system used) has
been adjusted;
— a new Annex B (Use of unbonded tabs and conditions for gripping tab-less specimens using fine grip
faces) has been added.
A list of all parts in the ISO 527 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
iv
  © ISO 2021 – All rights reserved

---------------------- Page: 10 ----------------------
SIST EN ISO 527-5:2022
INTERNATIONAL STANDARD ISO 527-5:2021(E)
Plastics — Determination of tensile properties —
Part 5:
Test conditions for unidirectional fibre-reinforced plastic
composites
1 Scope
This document specifies the test conditions for the determination of the tensile properties of
unidirectional fibre-reinforced plastic composites, based upon the general principles given in ISO 527-1.
NOTE Isotropic and orthotropic reinforced materials are covered by ISO 527-4.
The methods are used to investigate the tensile behaviour of the test specimens and for determining
the tensile strength, tensile modulus, Poisson's ratios and other aspects of the tensile stress-strain
relationship under the conditions defined.
The test method is suitable for all polymer matrix systems reinforced with unidirectional fibres and
which meet the requirements, including failure mode, set out in this document.
The method is suitable for composites with either thermoplastic or thermosetting matrices, including
preimpregnated materials (prepregs). The reinforcements covered include carbon fibres, glass fibres,
aramid fibres and other similar fibres. The reinforcement geometries covered include unidirectional
(i.e. completely aligned) fibres and rovings and unidirectional fabrics and tapes.
The method is not normally suitable for multidirectional materials composed of several unidirectional
layers at different angles (see ISO 527-4).
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.
ISO 527-1:2019, Plastics — Determination of tensile properties — Part 1: General principles
ISO 1268 (all parts), Fibre-reinforced plastics — Methods of producing test plates
ISO 2818, Plastics — Preparation of test specimens by machining
ISO 16012, Plastics — Determination of linear dimensions of test specimens
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
1
© ISO 2021 – All rights reserved

---------------------- Page: 11 ----------------------
SIST EN ISO 527-5:2022
ISO 527-5:2021(E)
3.1
gauge length
L
0
initial distance between the gauge marks on the central part of the test specimen
Note 1 to entry: It is expressed in millimetres (mm).
Note 2 to entry: The values of the gauge length that are indicated for the specimen types in the different parts of
ISO 527 represent the maximum relevant gauge length.
[SOURCE: ISO 527-1:2019, 3.1]
3.2
thickness
h
smaller initial dimension of the rectangular cross-section in the central part of a test specimen
Note 1 to entry: It is expressed in millimetres (mm).
[SOURCE: ISO 527-1:2019, 3.2]
3.3
width
b
1
larger initial dimension of the rectangular cross-section in the central part of a test specimen
Note 1 to entry: It is expressed in millimetres (mm).
[SOURCE: ISO 527-1:2019, 3.3]
3.4
test speed
v
rate of separation of the gripping jaws
Note 1 to entry: It is expressed in millimetres per minute (mm/min).
[SOURCE: ISO 527-1:2019, 3.5]
3.5
stress
σ
normal force per unit area of the original cross-section within the gauge length (3.1)
Note 1 to entry: It is expressed in megapascals (MPa).
Note 2 to entry: In order to differentiate from the true stress related to the actual cross-section of the specimen,
this stress is frequently called “engineering stress”.
Note 3 to entry: σ for type A specimens is defined as σ and for type B specimens as σ (see 3.9, Figure 2 and
1 2
Clause 6 for definitions of these directions).
[SOURCE: ISO 527-1:2019, 3.6, modified — Domain “” and Note 3 to entry has been added.]
3.5.1
strength
σ
m
maximum stress observed during a tensile test
Note 1 to entry: It is expressed in megapascals (MPa).
Note 2 to entry: σ for type A specimens is defined as σ and for type B specimens as σ .
m m1 m2
2
  © ISO 2021 – All rights reserved

---------------------- Page: 12 ----------------------
SIST EN ISO 527-5:2022
ISO 527-5:2021(E)
[SOURCE: ISO 527-1:2019, 3.6.2]
3.6
strain
ε
increase in length per unit original length of the gauge
Note 1 to entry: For type A specimens, ε is defined as ε and for type B specimens as ε .
1 2
Note 2 to entry: It is expressed as a dimensionless ratio, or as a percentage (%).
[SOURCE: ISO 527-1:2019, 3.7]
3.6.1
strain at strength
failure strain
ε
m
strain at which the strength (3.5.1) is reached
Note 1 to entry: For type A specimens, ε is defined as ε and for type B specimens as ε .
m m1 m2
Note 2 to entry: It is expressed as a dimensionless ratio, or as a percentage (%).
[SOURCE: ISO 527-1:2019, 3.7.3]
3.7
tensile modulus
modulus of elasticity in tension
E
slope of the stress-strain curve σ(ε) in the interval between the two strains ε‘ = 0,05 % and ε‘’ = 0,25 %
(see Figure 1)
Note 1 to entry: It is expressed in megapascals (MPa).
Note 2 to entry: It may be calculated either as the chord modulus or as the slope of a linear least-squares
regression line in this interval.
...

SLOVENSKI STANDARD
oSIST prEN ISO 527-5:2020
01-september-2020
Polimerni materiali - Ugotavljanje nateznih lastnosti - 5. del: Preskusni pogoji za
enostransko z vlakni ojačene polimerne kompozite (ISO/DIS 527-5:2020)
Plastics - Determination of tensile properties - Part 5: Test conditions for unidirectional
fibre-reinforced plastic composites (ISO/DIS 527-5:2020)
Kunststoffe - Bestimmung der Zugeigenschaften - Teil 5: Prüfbedingungen für
unidirektional faserverstärkte Kunststoffverbundwerkstoffe (ISO/DIS 527-5:2020)
Plastiques - Détermination des propriétés en traction - Partie 5 : Conditions d'essai pour
les composites plastiques renforcés de fibres unidirectionnelles (ISO/DIS 527-5:2020)
Ta slovenski standard je istoveten z: prEN ISO 527-5
ICS:
83.120 Ojačani polimeri Reinforced plastics
oSIST prEN ISO 527-5:2020 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
oSIST prEN ISO 527-5:2020

---------------------- Page: 2 ----------------------
oSIST prEN ISO 527-5:2020
DRAFT INTERNATIONAL STANDARD
ISO/DIS 527-5
ISO/TC 61/SC 13 Secretariat: JISC
Voting begins on: Voting terminates on:
2020-07-01 2020-09-23
Plastics — Determination of tensile properties —
Part 5:
Test conditions for unidirectional fibre-reinforced plastic
composites
Plastiques — Détermination des propriétés en traction —
Partie 5: Conditions d'essai pour les composites plastiques renforcés de fibres unidirectionnelles
ICS: 83.120
THIS DOCUMENT IS A DRAFT CIRCULATED
This document is circulated as received from the committee secretariat.
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
ISO/CEN PARALLEL PROCESSING
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 527-5:2020(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
©
PROVIDE SUPPORTING DOCUMENTATION. ISO 2020

---------------------- Page: 3 ----------------------
oSIST prEN ISO 527-5:2020
ISO/DIS 527-5:2020(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2020
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Fax: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved

---------------------- Page: 4 ----------------------
oSIST prEN ISO 527-5:2020
ISO/DIS 527-5:2020(E)

Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 4
5 Apparatus . 4
6 Test specimens. 4
6.1 Shape and dimensions . 4
6.1.1 General. 4
6.1.2 Type A specimen (for longitudinal direction) . 7
6.1.3 Type B specimen (for transverse direction) . 7
6.2 Preparation of specimens . 7
6.2.1 General. 7
6.2.2 End tabs . 7
6.2.3 Application of end tabs . 7
6.3 Gauge marks . 7
6.4 Checking the specimens . 7
7 Number of specimens . 8
8 Conditioning . 8
9 Procedure. 8
9.1 Test atmosphere . 8
9.2 Measurement of specimen dimensions . 8
9.3 Clamping . 8
9.4 Prestresses . 8
9.5 Setting of extensometers and strain gauges and placing of gauge marks . 8
9.6 Test speed . 8
9.7 Recording of data . 8
10 Calculation and expression of results . 8
10.1 Calculation of all properties for parallel sided specimens (Type A and B) . 8
11 Precision . 9
12 Test report . 9
Annex A (normative) Specimen preparation (type A and B) .10
Annex B (informative) Alignment of specimens .12
Annex C (informative) Use of unbonded tabs and conditions for gripping tab-less
specimens using fine grip faces .13
Bibliography .16
© ISO 2020 – All rights reserved iii

---------------------- Page: 5 ----------------------
oSIST prEN ISO 527-5:2020
ISO/DIS 527-5:2020(E)

Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/ patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www .iso .org/
iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 13,
Composites and reinforcement fibres.
This third edition cancels and replaces the second edition (ISO 527-5:2009), of which it constitutes a
revision. The main changes are as follows:
— Adjustment of gripping force or pressure (e.g. via torque or manometer depending on gripping
system used)
— Implementation of annex C (Unbonded tabs or gripping condition without tabs using fine grip face),
Consideration is being given to the use of Type 4 specimen in ISO 527 Part 4 in a future revision
following an international interlaboratory round robin on testing unidirectional materials in the 90º
direction.
A list of all parts in the ISO 527 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2020 – All rights reserved

---------------------- Page: 6 ----------------------
oSIST prEN ISO 527-5:2020
DRAFT INTERNATIONAL STANDARD ISO/DIS 527-5:2020(E)
Plastics — Determination of tensile properties —
Part 5:
Test conditions for unidirectional fibre-reinforced plastic
composites
1 Scope
1.1 This part of ISO 527 specifies the test conditions for the determination of the tensile properties of
unidirectional fibre-reinforced plastic composites, based upon the general principles given in Part 1.
1.2 The methods are used to investigate the tensile behaviour of the test specimens and for determining
the tensile strength, tensile modulus, Poisson's ratios and other aspects of the tensile stress/strain
relationship under the conditions defined.
1.3 The test method is suitable for all polymer matrix systems reinforced with unidirectional fibres
and which meet the requirements, including failure mode, set out in this part of ISO 527.
The method is suitable for composites with either thermoplastic or thermosetting matrices, including
preimpregnated materials (prepregs). The reinforcements covered include carbon fibres, glass fibres,
aramid fibres and other similar fibres. The reinforcement geometries covered include unidirectional
(i.e. completely aligned) fibres and rovings and unidirectional fabrics and tapes.
The method is not normally suitable for multidirectional materials composed of several unidirectional
layers at different angles (see ISO 527 4).
1.4 The method is performed using one of two different types of test specimen, depending on
the direction of the applied stress relative to the fibre direction (see Clause 6) and depending on the
application of end tabs.
2 Normative references
The following referenced documents are indispensable for the application 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.
ISO 527-1, Plastics — Determination of tensile properties — Part 1: General principles
ISO 527-4, Plastics — Determination of tensile properties — Part 4: Test conditions for isotropic and
orthotropic fibre-reinforced plastic composites
ISO 1268 (all parts), Fibre-reinforced plastics — Methods of producing test plates
ISO 2818, Plastics — Preparation of test specimens by machining
ISO 3534-1, Statistics — Vocabulary and symbols — Part 1: General statistical terms and terms used in
probability
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
© ISO 2020 – All rights reserved 1

---------------------- Page: 7 ----------------------
oSIST prEN ISO 527-5:2020
ISO/DIS 527-5:2020(E)

3.1
gauge length
See ISO 527-1, Subclause 3.1.
3.2
thickness
h
See ISO 527-1, subclause 3.2
3.3
width
b
See ISO 527-1, subclause 3.3
3.4
speed of testing
See ISO 527-1, Subclause 3.5.
3.5
tensile stress
σ (engineering)
See ISO 527-1, Subclause 4.3, except that σ for type A specimens is defined as σ and for type B specimens
1
as σ (see Clause 6 for details of type A and B specimens).
2
3.5.1
tensile strength
σ
M
See ISO 527-1, Subclause 4.3.3, except that σ for type A specimens is defined as σ and for type B
M M1
specimens as σ .
M2
3.6
tensile strain
ε
increase in length per unit length of the original gauge length
Note 1 to entry: For type A specimens, ε is defined as ε and for type B specimens as ε .
1 2
Note 2 to entry: It is expressed as a dimensionless ratio or in percent.
3.7
tensile strain at tensile strength
tensile failure strain
ε
M
tensile strain at the point corresponding to the tensile strength of the specimen
Note 1 to entry: For type A specimens, ε is defined as ε and for type B specimens as ε .
M M1 M2
Note 2 to entry: It is expressed as a dimensionless ratio or in percent.
3.8
modulus of elasticity in tension
Young's modulus
E
See ISO 527-1, Subclause 4.6, except that E for type A specimens is defined as E and for type B
1
specimens as E .
2
Note 1 to entry: The strain values used are as given in ISO 527-1, Subclause 3.9, i.e. ε′ = 0,000 5 and ε′′ = 0,002 5
(see Figure 1), unless alternative values are given in the material or technical specifications.
2 © ISO 2020 – All rights reserved

---------------------- Page: 8 ----------------------
oSIST prEN ISO 527-5:2020
ISO/DIS 527-5:2020(E)

3.9
Poisson's ratio
μ
See ISO 527-1, Subclause 3.10, except that for type A specimens μ is defined as μ and μ as μ , using
b 12 h 13
the coordinates shown in Figure 2, and for type B specimens μ is defined as μ and μ as μ .
b 21 h 23
3.10
specimen coordinate axes
coordinate axes for the material under test, as shown in Figure 2, the direction parallel to the fibres
being defined as the “1”-direction and the direction perpendicular to them (in the plane of the fibres) as
the “2”-direction
Note 1 to entry: The “1”-direction is also referred to as the 0° or longitudinal direction and the “2”-direction as
the 90° or transverse direction.
Key
X strain, ε
Y stress, σ
a
Slope E.
Figure 1 — Stress-strain curve
© ISO 2020 – All rights reserved 3

---------------------- Page: 9 ----------------------
oSIST prEN ISO 527-5:2020
ISO/DIS 527-5:2020(E)

Figure 2 — Unidirectionally reinforced plastic composite showing axes of symmetry
4 Principle
See ISO 527-1, Clause 4.
5 Apparatus
See ISO 527-1, Clause 5, except for the following:
The micrometre or its equivalent (see ISO 16012) shall read t
...