prEN ISO 17138
(Main)Fine ceramics (advanced ceramics, advanced technical ceramics) - Mechanical properties of ceramic composites at room temperature - Determination of flexural strength (ISO/DIS 17138:2025)
Fine ceramics (advanced ceramics, advanced technical ceramics) - Mechanical properties of ceramic composites at room temperature - Determination of flexural strength (ISO/DIS 17138:2025)
ISO 17138:2014 describes a method for the determination of the flexural strength of ceramic matrix composite materials with continuous fibre reinforcement, under three-point or four-point bend at room temperature. This method applies to all ceramic matrix composites with a continuous fibre reinforcement, unidirectional (1D), bidirectional (2D), and tridirectional xD with (2 < x ≤ 3) as defined in CEN/TR 13233, loaded along one principal axis of reinforcement.
Hochleistungskeramik - Mechanische Eigenschaften von keramischen Verbundwerkstoffen bei Raumtemperatur - Bestimmung der Biegefestigkeit (ISO/DIS 17138:2025)
Céramiques techniques - Propriétés mécaniques des composites céramiques à température ambiante - Détermination de la résistance en flexion (ISO/DIS 17138:2025)
L'ISO 17138:2014 décrit une méthode permettant de déterminer la résistance en flexion des matériaux composites à matrice céramique et à renforts de fibres continus par un essai de flexion en trois ou quatre points à température ambiante. Cette méthode s'applique à tous les composites à matrice céramique à renforts de fibres continus, unidirectionnels (1D), renforcés dans le plan (2D) et multidirectionnels xD avec (2 < x ≤ 3), conformément au CEN/TR 13233, sollicités suivant un axe principal de renfort.
Fina keramika (sodobna keramika, sodobna tehnična keramika) - Mehanske lastnosti keramičnih kompozitov pri sobni temperaturi - Ugotavljanje upogibne trdnosti (ISO/DIS 17138:2025)
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Standards Content (Sample)
SLOVENSKI STANDARD
01-april-2025
Fina keramika (sodobna keramika, sodobna tehnična keramika) - Mehanske
lastnosti keramičnih kompozitov pri sobni temperaturi - Ugotavljanje upogibne
trdnosti (ISO/DIS 17138:2025)
Fine ceramics (advanced ceramics, advanced technical ceramics) - Mechanical
properties of ceramic composites at room temperature - Determination of flexural
strength (ISO/DIS 17138:2025)
Hochleistungskeramik - Mechanische Eigenschaften von keramischen
Verbundwerkstoffen bei Raumtemperatur - Bestimmung der Biegefestigkeit (ISO/DIS
17138:2025)
Céramiques techniques - Propriétés mécaniques des composites céramiques à
température ambiante - Détermination de la résistance en flexion (ISO/DIS 17138:2025)
Ta slovenski standard je istoveten z: prEN ISO 17138
ICS:
81.060.30 Sodobna keramika Advanced ceramics
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
DRAFT
International
Standard
ISO/DIS 17138
ISO/TC 206
Fine ceramics (advanced ceramics,
Secretariat: JISC
advanced technical ceramics) —
Voting begins on:
Mechanical properties of ceramic
2025-02-10
composites at room temperature —
Voting terminates on:
Determination of flexural strength
2025-05-05
Céramiques techniques — Propriétés mécaniques des composites
céramiques à température ambiante — Détermination de la
resistance en flexion
ICS: 81.060.30
THIS DOCUMENT IS A DRAFT CIRCULATED
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IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
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This document is circulated as received from the committee secretariat.
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Reference number
ISO/DIS 17138:2025(en)
DRAFT
ISO/DIS 17138:2025(en)
International
Standard
ISO/DIS 17138
ISO/TC 206
Fine ceramics (advanced ceramics,
Secretariat: JISC
advanced technical ceramics) —
Voting begins on:
Mechanical properties of ceramic
composites at room temperature —
Voting terminates on:
Determination of flexural strength
Céramiques techniques — Propriétés mécaniques des composites
céramiques à température ambiante — Détermination de la
resistance en flexion
ICS: 81.060.30
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
© ISO 2025
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
STANDARDS MAY ON OCCASION HAVE TO
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Published in Switzerland Reference number
ISO/DIS 17138:2025(en)
ii
ISO/DIS 17138:2025(en)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Significance and use . 1
4 Terms, definitions, and symbols . 2
5 Principle . 2
6 Apparatus . 2
6.1 Test machine .2
6.2 Test fixture .2
6.3 Data recording system .3
6.4 Dimension measuring devices .3
7 Test specimens . 3
8 Test specimen preparation . 4
8.1 Machining and preparation .4
8.2 Number of test specimens .4
9 Test procedures . 4
9.1 Displacement rate .4
9.2 Measurement of dimensions .4
9.2.1 Test specimen dimensions .4
9.2.2 Distances between supporting rollers.4
9.3 Testing technique .4
9.3.1 Test specimen mounting .4
9.3.2 Measurements .5
9.4 Test validity .5
9.5 Calculation of results .5
9.5.1 General .5
9.5.2 Three-point bend .5
9.5.3 Four-point bend .6
10 Test report . 6
Bibliography . 8
iii
ISO/DIS 17138:2025(en)
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 on the meaning of ISO specific terms and expressions related to conformity assessment,
as well as information about ISO's adherence to the WTO principles in the Technical Barriers to Trade (TBT)
see the following URL: Foreword - Supplementary information
The committee responsible for this document is ISO/TC 206, Fine ceramics.
iv
DRAFT International Standard ISO/DIS 17138:2025(en)
Fine ceramics (advanced ceramics, advanced technical
ceramics) — Mechanical properties of ceramic composites at
room temperature — Determination of flexural strength
1 Scope
This International Standard describes a method for the determination of the flexural strength of ceramic
matrix composite materials with continuous fibre reinforcement, under three-point or four-point bend
at room temperature. This method applies to all ceramic matrix composites with a continuous fibre
reinforcement, unidirectional (1D), bidirectional (2D), and tridirectional xD with (2 < x ≤ 3) as defined in
ISO 19634, loaded along one principal axis of reinforcement.
NOTE The method is not intended to be used to obtain absolute values of strength for design purposes.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
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 3611, Geometrical product specifications (GPS) — Dimensional measuring equipment — Design and
metrological characteristics of micrometers for external measurements
ISO 19634, Advanced technical ceramics — Ceramic composites — Notations and symbols
3 Significance and use
Flexural tests are used for strength estimation for linear elastic brittle materials, for which tensile testing
presents practical difficulties. They are never used for
...
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