ISO 20144:2019

INTERNATIONAL ISO
STANDARD 20144
First edition
2019-07
Fibre-reinforced plastic composites —
Standard qualification plan (SQP) for
composite materials, including reduced
qualification plan (RQP) and extended
qualification plan (EQP) schemes
Composites plastiques renforcés de fibres — Plan de qualification
normalisé (PQN) pour matériaux composites, y compris les
programmes pour plan de qualification réduit (PQR) et plan de
qualification étendu (PQE)
Reference number
©
ISO 2019
© ISO 2019
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: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2019 – All rights reserved

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 3
4 Principle . 4
5 Test methods and specimen conditioning . 4
6 Test matrices and specimen sampling . 5
7 Apparatus . 6
8 Test plate preparation and specimen machining .11
9 Test requirements .11
9.1 Standard qualification plan .11
9.2 Extended qualification plan .11
9.3 Reduced qualification plan .11
10 Presentation of results — Standardized data sheets .11
11 Statistical analysis .12
12 Precision .12
13 Test report .14
Annex A (normative) Report sheets .15
Annex B (normative) Determination of statistical parameters.19
Bibliography .27
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.
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 2019 – All rights reserved

Introduction
This document has been prepared to provide suppliers, designers, end-users and regulators of fibre-
reinforced plastic/composite materials, with an initial qualification framework aimed at reducing the
substantial costs involved in qualifying materials against different bespoke company specifications,
with varying degrees of commonality. Indeed, the cost associated with qualifying materials can prevent
the use of new materials in certain applications or even the development of new materials themselves.
In addition, designers and end-users often find that appropriate data for materials selection and
preliminary design are not readily available or comparable. Widespread use of this document for initial
qualification is intended to lead to a reduction in qualification costs and increased availability of reliable
and robust materials data across a wide range of sectors and applications. It provides for more detailed
qualification procedures, including calculation of B-basis design allowable, compared to ISO 10350-2.
Material suppliers are intended to adopt this procedure for obtaining the required data to support
initial material selection and qualification; and to supply the specified data, in the format given in
Annex A, at the same time as release of the material evaluated. This will greatly extend the availability
of consistent and comparable materials data based on agreed individual, international test methods to
support users, fabricators and regulators.
Validation has been undertaken for thermoset systems, which are currently the most abundant and
[1]
established matrix-based systems. However, it is accepted that the calculations, and therefore the
property data, can also be applied to similar thermoplastic matrix-based systems.
Therefore, thermoplastic matrix-based systems can also be covered by the document, providing the
underpinning test method’s technical aspects are met regarding failure mode etc.; with the exclusion of
property tests specifically designed for uncured thermoset materials, where indicated.
It is noted that, simultaneously, the underpinning test methods are themselves being reviewed
for application to a wider range of fibre formats and matrices. Validation data will be added for
thermoplastic matrix-based systems when international precision trials are conducted.
INTERNATIONAL STANDARD ISO 20144:2019(E)
Fibre-reinforced plastic composites — Standard
qualification plan (SQP) for composite materials,
including reduced qualification plan (RQP) and extended
qualification plan (EQP) schemes
1 Scope
1.1 This document specifies a procedure for the initial qualification of composite materials in order
to allow quality control, material selection and preliminary design to be undertaken. It provides a single
procedure allowing quicker and lower cost qualification compared to multiple bi-lateral qualification
against different bespoke user needs. This document focuses on developing B-basis design allowables.
1.2 The procedure comprises a standard qualification plan (SQP) that includes the minimum common
test requirements for more highly anisotropic composite materials. Further test requirements are
encompassed in an extended qualification plan (EQP), which includes options representing specific in-
service features. A reduced qualification plan (RQP) scheme, using the same core structure of test plate
preparation and test methods as the SQP, is available for less highly anisotropic and tending towards
nominally isotropic composite materials.
1.3 The procedure is suitable for fibre-reinforced thermoset, and thermoplastic, based material
systems intended for structural or semi-structural applications. Individual test method standards
referred to in this document provide more details as to the classes and types of composite materials that
are covered in each case.
1.4 Annexes A and B are included to support presentation of the data obtained in a consistent database
and to provide statistical procedures for the determination of B-basis design allowables, respectively.
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 62, Plastics — Determination of water absorption
ISO 75-3, Plastics — Determination of temperature of deflection under load — Part 3: High-strength
thermosetting laminates and long-fibre-reinforced plastics
ISO 291, Plastics — Standard atmospheres for conditioning and testing
ISO 527-4, Plastics — Determination of tensile properties — Part 4: Test conditions for isotropic and
orthotropic fibre-reinforced plastic composites
ISO 527-5, Plastics — Determination of tensile properties — Part 5: Test conditions for unidirectional fibre-
reinforced plastic composites
ISO 1172, Textile-glass-reinforced plastics — Prepregs, moulding compounds and laminates —
Determination of the textile-glass and mineral-filler content — Calcination methods
ISO 1183 (all parts), Plastics — Methods for determining the density and relative density of non-
cellular plastic
ISO 1268 (all parts), Fibre-reinforced plastics — Methods of producing test plates
ISO 1675, Plastics — Liquid resins — Determination of density by the pyknometer method
ISO 2818, Plastics — Preparation of test specimens by machining
ISO 6603-2, Plastics — Determination of puncture impact behaviour of rigid plastics — Part 2: Instrumented
impact testing
ISO 6721-11, Plastics — Determination of dynamic mechanical properties — Part 11: Glass transition
temperature
ISO 9782, Plastics — Reinforced moulding compounds and prepregs — Determination of apparent volatile-
matter content
ISO 10119, Carbon fibre — Determination of density
ISO 10352, Fibre-reinforced plastics — Moulding compounds and prepregs — Determination of mass per
unit area
ISO 11357-1, Plastics — Differential scanning calorimetry (DSC) — Part 1: General principles Differential
scanning calorimetry (DSC) — Part 1: General principles
ISO 11357-2, Plastics — Differential scanning calorimetry (DSC) — Part 2: Determination of glass transition
temperature and glass transition step height
ISO 11359-2, Plastics — Thermomechanical analysis (TMA) — Part 2: Determination of coefficient of linear
thermal expansion and glass transition temperature
ISO 11667, Fibre-reinforced plastics — Moulding compounds and prepregs — Determination of resin,
reinforced-fibre and mineral-filler content — Dissolution methods
ISO 12815, Fibre-reinf
...