SIST EN ISO 20505:2025
(Main)Fine ceramics (advanced ceramics, advanced technical ceramics) - Mechanical properties of ceramic composites at room temperature - Determination of the interlaminar shear strength and shear modulus of continuous-fibre-reinforced composites by the compression of double-notched test pieces and by the Iosipescu test (ISO 20505:2023)
Fine ceramics (advanced ceramics, advanced technical ceramics) - Mechanical properties of ceramic composites at room temperature - Determination of the interlaminar shear strength and shear modulus of continuous-fibre-reinforced composites by the compression of double-notched test pieces and by the Iosipescu test (ISO 20505:2023)
This document specifies a method for the determination of interlaminar shear strength at ambient temperature by the compression of a double-notched test piece and a method for the determination of interlaminar shear strength and modulus at ambient temperature by the Iosipescu test. This document applies to all ceramic matrix composites with a continuous fibre reinforcement, having unidirectional (1D), bidirectional (2D) and multidirectional (xD, with x > 2) fibre architecture, where a major part of reinforcements is a stack of plies.
This document is applicable to material development, material comparison, quality assurance, characterization, reliability and design data generation. The simpler compression test method of a double-notched test piece is applicable only when the shear strength has to be measured.
Hochleistungskeramik - Mechanische Eigenschaften von keramischen Verbundwerkstoffen bei Raumtemperatur - Bestimmung der Scherfestigkeit und des Schubmoduls endlosfaserverstärkter Verbundwerkstoffe durch Druckbeanspruchung von doppeltgekerbten Proben und durch den Iosipescu-Test (ISO 20505:2023)
Céramiques techniques - Propriétés mécaniques des céramiques composites à température ambiante - Détermination de la résistance au cisaillement interlaminaire et du module de cisaillement des composites renforcés par des fibres continues, par la compression d’éprouvettes à double entaille et par l’essai Iosipescu (ISO 20505:2023)
Fina keramika (sodobna keramika, sodobna tehnična keramika) - Mehanske lastnosti keramičnih kompozitov pri sobni temperaturi - Določevanje medplastne strižne trdnosti in strižnega modula kompozitov, ojačanih z neprekinjenimi vlakni, s stiskanjem preizkušancev z dvojnim vrezom in z Iosipescujevim preskusom (ISO 20505:2023)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-maj-2025
Fina keramika (sodobna keramika, sodobna tehnična keramika) - Mehanske
lastnosti keramičnih kompozitov pri sobni temperaturi - Določevanje medplastne
strižne trdnosti in strižnega modula kompozitov, ojačanih z neprekinjenimi vlakni,
s stiskanjem preizkušancev z dvojnim vrezom in z Iosipescujevim preskusom (ISO
20505:2023)
Fine ceramics (advanced ceramics, advanced technical ceramics) - Mechanical
properties of ceramic composites at room temperature - Determination of the
interlaminar shear strength and shear modulus of continuous-fibre-reinforced composites
by the compression of double-notched test pieces and by the Iosipescu test (ISO
20505:2023)
Hochleistungskeramik - Mechanische Eigenschaften von keramischen
Verbundwerkstoffen bei Raumtemperatur - Bestimmung der Scherfestigkeit und des
Schubmoduls endlosfaserverstärkter Verbundwerkstoffe durch Druckbeanspruchung von
doppeltgekerbten Proben und durch den Iosipescu-Test (ISO 20505:2023)
Céramiques techniques - Propriétés mécaniques des céramiques composites à
température ambiante - Détermination de la résistance au cisaillement interlaminaire et
du module de cisaillement des composites renforcés par des fibres continues, par la
compression d’éprouvettes à double entaille et par l’essai Iosipescu (ISO 20505:2023)
Ta slovenski standard je istoveten z: EN ISO 20505:2025
ICS:
81.060.30 Sodobna keramika Advanced ceramics
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN ISO 20505
EUROPEAN STANDARD
NORME EUROPÉENNE
February 2025
EUROPÄISCHE NORM
ICS 81.060.30 Supersedes EN 658-4:2003
English Version
Fine ceramics (advanced ceramics, advanced technical
ceramics) - Mechanical properties of ceramic composites
at room temperature - Determination of the interlaminar
shear strength and shear modulus of continuous-fibre-
reinforced composites by the compression of double-
notched test pieces and by the Iosipescu test (ISO
20505:2023)
Céramiques techniques - Propriétés mécaniques des Hochleistungskeramik - Mechanische Eigenschaften
céramiques composites à température ambiante - von keramischen Verbundwerkstoffen bei
Détermination de la résistance au cisaillement Raumtemperatur - Bestimmung der Scherfestigkeit
interlaminaire et du module de cisaillement des und des Schubmoduls endlosfaserverstärkter
composites renforcés par des fibres continues, par la Verbundwerkstoffe durch Druckbeanspruchung von
compression d'éprouvettes à double entaille et par doppeltgekerbten Proben und durch den Iosipescu-
l'essai Iosipescu (ISO 20505:2023) Test (ISO 20505:2023)
This European Standard was approved by CEN on 24 February 2025.
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, Türkiye 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
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 20505:2025 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
European foreword
The text of ISO 20505:2023 has been prepared by Technical Committee ISO/TC 206 "Fine ceramics” of
the International Organization for Standardization (ISO) and has been taken over as EN ISO 20505:2025
by Technical Committee CEN/TC 184 “Advanced technical ceramics” the secretariat of which is held by
DIN.
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 August 2025, and conflicting national standards shall
be withdrawn at the latest by August 2025.
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 658-4:2003.
Any feedback and questions on this document should be directed to the users’ national standards body.
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, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 20505:2023 has been approved by CEN as EN ISO 20505:2025 without any modification.
INTERNATIONAL ISO
STANDARD 20505
Second edition
2023-10
Fine ceramics (advanced ceramics,
advanced technical ceramics) —
Mechanical properties of ceramic
composites at room temperature —
Determination of the interlaminar
shear strength and shear modulus
of continuous-fibre-reinforced
composites by the compression of
double-notched test pieces and by the
Iosipescu test
Céramiques techniques — Propriétés mécaniques des céramiques
composites à température ambiante — Détermination de la
résistance au cisaillement interlaminaire et du module de cisaillement
des composites renforcés par des fibres continues, par la compression
d’éprouvettes à double entaille et par l’essai Iosipescu
Reference number
ISO 20505:2023(E)
ISO 20505:2023(E)
© ISO 2023
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
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Published in Switzerland
ii
ISO 20505:2023(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 4
4.1 General . 4
4.2 Double-notched test . 4
4.3 Iosipescu test . 4
5 Apparatus . 5
5.1 Test machine . 5
5.2 Load train . 5
5.2.1 Generalities . 5
5.2.2 Test fixtures . 6
5.3 Strain gauges for Iosipescu test specimen . 8
5.4 Data acquisition . 9
5.5 Dimension-measuring devices . 9
6 Test specimens . 9
6.1 Double-notched test piece . 9
6.2 Iosipescu test piece . 11
7 Test specimen preparation .12
7.1 Machining and preparation . 12
7.2 Bonding of the gauges . 12
7.3 Number of test specimens .12
8 Test procedures .12
8.1 Displacement rate .12
8.2 Measurement of test specimen dimensions . 13
8.3 Testing technique . 13
8.3.1 Specimen mounting . 13
8.3.2 Measurements . 14
8.4 Test validity . 15
9 Calculation of results .16
9.1 Shear strength . 16
9.1.1 Double-notched test piece . 16
9.1.2 Iosipescu test piece .
...
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