Advanced technical ceramics - Mechanical properties of ceramic composites at room temperature - Part 5: Determination of interlaminar shear strength by short span bend test (three points)

This part of EN 658 specifies the conditions for the determination of the interlaminar shear strength matrix composite materials with continuous fibre reinforcement at ambient temperature, by subjecting a test specimen to a short-span, three points, bend test. The method applies to unidirectionally and bidirectionally reinforced ceramic matrix composites, as well as to tridirectional composites with weak reinforcement in the third direction.

Hochleistungskeramik - Mechanische Eigenschaften von keramischen Verbundwerkstoffen bei Raumtemperatur - Teil 5: Bestimmung der Scherfestigkeit im Drei-Punkt-Biegeversuch mit kurzem Auflagerabstand

In diesem Teil von prEN 658 sind die Bedingungen zu Bestimmung der interlaminaren Scherfestigkeit von endlosfaserverstärkten Verbundwerkstoffen mit keramischer Matrix bei Raumtemperatur durch Belastung von Proben mit kurzem Auflagerabstand im Drei-Punkt-Biegeversuch festgelegt. Dieses Verfahren ist für endlosfaserverstärkte keramische Verbundwerkstoffe mit unidirektionaler, bidirektionaler und bei tridirektionaler Faserverstärkung mit schwacher Verstärkung in der dritten Richtung anzuwenden.

Céramiques techniques avancées - Propriétés mécaniques des céramiques composites à température ambiante - Partie 5: Détermination de la résistance au cisaillement interlaminaire par essai de flexion sur appuis rapprochés (trois points)

La présente partie de cette Norme européenne spécifie les conditions de la détermination de la résistance au cisaillement interlaminaire des matériaux composites à matrice céramique à renfort continu, à la température ambiante, en soumettant une éprouvette à un essai de flexion sur appuis rapprochés (trois points). Cette méthode s'applique à tous les composites à matrice céramique à renforts continus unidirectionnels (1D), bidirectionnels (2D) et tridirectionnels, (xD, avec 2 < x < 3), définis dans l'ENV 13233.
Deux autres méthodes de détermination de la résistance au cisaillement sont données dans les autres parties de l'EN 658.
NOTE 1   Les caractéristiques de cisaillement interlaminaire peuvent varier de manière non négligeable selon la préparation et les dimensions de l'éprouvette, la vitesse d'application de la force d'essai, l'aspect de la surface, etc.
NOTE 2   Cependant, les résultats obtenus dans la présente partie de l'EN 658 ne peuvent être comparés avec les résultats obtenus selon les deux autres méthodes.
NOTE 3   Il convient d'être prudent en interprétant les résultats de la méthode proposée pour obtenir des valeurs absolues de la résistance au cisaillement interlaminaire des composites à matrice céramique à des fins de conception.

Advanced technical ceramics - Mechanical properties of ceramic composites at room temperature - Part 5: Determination of interlaminar shear strength by short span bend test (three points)

General Information

Status
Published
Publication Date
03-Dec-2002
ICS
81.060.30 - Advanced ceramics
Technical Committee
CEN/TC 184 - Advanced technical ceramics
Drafting Committee
CEN/TC 184/SC 1 - Ceramic composites
Current Stage
9093 - Decision to confirm - Review Enquiry
Start Date
01-Apr-2025
Completion Date
14-Apr-2025
Mandate
M/BC/CEN/90/4 - Request concerning the realisation of a standardization programme in the field of advanced technical ceramics
Ref Project
SIST EN 658-5:2004 - Advanced technical ceramics - Mechanical properties of ceramic composites at room temperature - Part 5: Determination of interlaminar shear strength by short span bend test (three points)

Relations

Replaces
ENV 658-5:1993 - Advanced technical ceramics - Mechanical properties of ceramic composites at room temperature - Part 5: Determination of shear strength by short span bend test (three-point)
Effective Date
22-Dec-2008

Overview

EN 658-5:2002 (CEN) defines a standardized laboratory method to determine the interlaminar shear strength (ILSS) of ceramic matrix composites with continuous fibre reinforcement at room temperature. The test uses a short-span, three-point bend configuration to induce interlaminar shear failure in unidirectional (1D), bidirectional (2D) and certain tridirectional (xD) ceramic composites. The document is part of the EN 658 family covering mechanical properties of advanced technical ceramics.

Key topics and technical requirements

  • Test principle: Measure the maximum force (F) that causes interlaminar shear during a short-span three-point bend; test at constant crosshead displacement.
  • Calculation: ILSS (MPa) = 3F / (4 b h), where F = shear failure force (N), b = mean specimen width (mm), h = mean specimen thickness (mm).
  • Specimen dimensions (recommended):
    • Thickness h = 3 mm
    • Width b = 10 mm
    • Support span S = 15 mm (S = 5 h − 1 if h differs)
    • Total length l0 = 20 to 25 mm
    • Plane parallelism after machining ≤ 0.05 mm
  • Apparatus:
    • Test machine meeting EN ISO 7500-1 grade 1 for force measurement accuracy.
    • Test jig with two outer support rollers and one loading roller; roller diameter 4–10 mm; roller axes parallel within 0.01 mm/mm; inner roller centered within 0.2 mm.
    • Measuring devices accurate to 0.1 mm (micrometers per ISO 3611).
  • Procedure requirements:
    • Constant displacement rate chosen to cause failure within ~1 minute (typically 0.5–1 mm/min).
    • At least five valid test results required.
    • Record force vs. time, specimen dimensions, failure mode and fracture location.
  • Validity and limitations:
    • Tests invalid if conditions, fracture mode/location, or other key data are not recorded.
    • Note: results from this method are not directly comparable with ILSS values from other EN 658 methods; exercise care when using values for design.

Applications and users

EN 658-5 is used by:

  • Materials and mechanical test laboratories validating ceramic matrix composite performance.
  • R&D teams developing advanced technical ceramics and composite processing methods.
  • Quality assurance and certification bodies verifying interlaminar shear behavior.
  • Engineers in industries employing CMCs (aerospace, energy & turbines, automotive braking and high‑temperature components) who need standardized comparative data for material selection.

Practical value: standardized ILSS data help assess laminar integrity, compare processing routes, and screen materials for shear-sensitive applications.

Related standards

  • EN 658 (Parts 1–6) - other mechanical tests for ceramic composites (tensile, compressive, flexural, other ILSS methods)
  • ENV 13233:1998 - notations and symbols for ceramic composites
  • EN ISO 7500-1:1999 - verification of testing machines
  • ISO 3611 - micrometer callipers
  • ENV 843-5 - statistical analysis guidance for ceramic tests

Keywords: EN 658-5:2002, interlaminar shear strength, ILSS, ceramic matrix composites, short-span three-point bend test, advanced technical ceramics, CEN.

Frequently Asked Questions

EN 658-5:2002 is a standard published by the European Committee for Standardization (CEN). Its full title is "Advanced technical ceramics - Mechanical properties of ceramic composites at room temperature - Part 5: Determination of interlaminar shear strength by short span bend test (three points)". This standard covers: This part of EN 658 specifies the conditions for the determination of the interlaminar shear strength matrix composite materials with continuous fibre reinforcement at ambient temperature, by subjecting a test specimen to a short-span, three points, bend test. The method applies to unidirectionally and bidirectionally reinforced ceramic matrix composites, as well as to tridirectional composites with weak reinforcement in the third direction.

This part of EN 658 specifies the conditions for the determination of the interlaminar shear strength matrix composite materials with continuous fibre reinforcement at ambient temperature, by subjecting a test specimen to a short-span, three points, bend test. The method applies to unidirectionally and bidirectionally reinforced ceramic matrix composites, as well as to tridirectional composites with weak reinforcement in the third direction.

EN 658-5:2002 is classified under the following ICS (International Classification for Standards) categories: 81.060.30 - Advanced ceramics. The ICS classification helps identify the subject area and facilitates finding related standards.

EN 658-5:2002 has the following relationships with other standards: It is inter standard links to ENV 658-5:1993. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

EN 658-5:2002 is associated with the following European legislation: Standardization Mandates: M/BC/CEN/90/4. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.

You can purchase EN 658-5:2002 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of CEN standards.

Standards Content (Sample)


SLOVENSKI STANDARD
01-januar-2004
1DGRPHãþD
SIST ENV 658-5:2000
Advanced technical ceramics - Mechanical properties of ceramic composites at
room temperature - Part 5: Determination of interlaminar shear strength by short
span bend test (three points)
Advanced technical ceramics - Mechanical properties of ceramic composites at room
temperature - Part 5: Determination of interlaminar shear strength by short span bend
test (three points)
Hochleistungskeramik - Mechanische Eigenschaften von keramischen
Verbundwerkstoffen bei Raumtemperatur - Teil 5: Bestimmung der Scherfestigkeit im
Drei-Punkt-Biegeversuch mit kurzem Auflagerabstand
Céramiques techniques avancées - Propriétés mécaniques des céramiques composites
a température ambiante - Partie 5: Détermination de la résistance au cisaillement
interlaminaire par essai de flexion sur appuis rapprochés (trois points)
Ta slovenski standard je istoveten z: EN 658-5:2002
ICS:
81.060.30 Sodobna keramika Advanced ceramics
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 658-5
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2002
ICS 81.060.30 Supersedes ENV 658-5:1993
English version
Advanced technical ceramics - Mechanical properties of ceramic
composites at room temperature - Part 5: Determination of
interlaminar shear strength by short span bend test (three
points)
Céramiques techniques avancées - Propriétés mécaniques Hochleistungskeramik - Mechanische Eigenschaften von
des céramiques composites à température ambiante - keramischen Verbundwerkstoffen bei Raumtemperatur -
Partie 5: Détermination de la résistance au cisaillement Teil 5: Bestimmung der Scherfestigkeit im Drei-Punkt-
interlaminaire par essai de flexion sur appuis rapprochés Biegeversuch mit kurzem Auflagerabstand
(trois points)
This European Standard was approved by CEN on 16 October 2002.
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 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 Management Centre has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2002 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 658-5:2002 E
worldwide for CEN national Members.

Contents
page
Foreword.3
1 Scope .4
2 Normative references .4
3 Principle.4
4 Terms, definitions and symbols.4
5 Apparatus .5
5.1 Test machine .5
5.2 Test jig.5
5.3 Dimension measuring devices .6
6 Test specimens .6
7 Test specimen preparation .6
7.1 Machining .6
7.2 Number of test specimens.6
8 Procedure .6
8.1 Displacement rate .6
8.2 Measurement of test specimens .6
8.3 Testing technique .7
8.3.1 Test specimen mounting.7
8.3.2 Measurements.7
8.4 Test validity .7
9 Calculation of results .7
10 Test report .8
Foreword
This document (EN 658-5:2002) has been prepared by Technical Committee CEN /TC 184, "Advanced technical
ceramics", the secretariat of which is held by BSI.
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 2003, and conflicting national standards shall be withdrawn at the latest by
June 2003.
This document supersedes ENV 658-5:1993.
EN 658 'Advanced technical ceramics – Mechanical properties of ceramic composites at room temperature' has six
parts:
 Part 1: Determination of tensile properties
 Part 2: Determination of compressive properties
 Part 3: Determination of flexural strength
 Part 4: Determination of interlaminar shear strength by compression loading of notched test specimens
 Part 5: Determination of interlaminar shear strength by short span bend test (three-points)
 Part 6: Determination of interlaminar shear strength by double-punch shearing
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland,
France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain,
Sweden, Switzerland and the United Kingdom.
1 Scope
This part of this European Standard specifies the conditions for determination of the interlaminar shear strengt
...

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