SIST EN 658-3:2004
(Main)Advanced technical ceramics - Mechanical properties of ceramic composites at room temperature - Part 3: Determination of flexural strength
Advanced technical ceramics - Mechanical properties of ceramic composites at room temperature - Part 3: Determination of flexural strength
This part of EN 658 specifies the conditions for the determination of the flexural strength of ceramic matrix composite materials with continuous fibre reinforcement, under three-point or four-point bending at ambient temperature. This standard applies to all ceramic matrix composites with a continuous fibre reinforcement, unidirectional (1D), bidirectional (2D), and tridirectional xD with (2 < x <= 3), loaded along one principal axis of reinforcement.
Hochleistungskeramik - Mechanische Eigenschaften von keramischen Verbundwerkstoffen bei Raumtemperatur - Teil 3: Bestimmung der Biegefestigkeit
Dieser Teil von EN 658 legt ein Verfahren zur Bestimmung der Biegefestigkeit von endlosfaserverstärkten Verbundwerkstoffen mit keramischer Matrix bei Raumtemperatur mittels Drei-Punkt- oder Vier-Punkt-Biegung fest. Dieses Verfahren gilt für alle keramischen Verbundwerkstoffe mit unidirektionaler (1D), bidirektionaler (2D) und tridirektionaler xD mit (2 < x < 3) Endlosfaserverstärkung, wie in ENV 13233 festgelegt, die parallel zu einer der Hauptachsen der Faserverstärkung beansprucht werden.
ANMERKUNG Das Prüfverfahren sollte nicht angewendet werden, um absolute Festigkeitskennwerte für Konstruktionszwecke zu ermitteln.
Céramiques techniques avancées - Propriétés mécaniques des céramiques composites a température ambiante - Détermination de la résistance en flexion
La présente partie de l'EN 658 décrit une méthode permettant de déterminer la résistance a la flexion des matériaux composites a matrice céramique et a renforts de fibres continus par un essai de flexion en trois points ou en quatre points a température ambiante. Cette méthode s'applique a tous les matériaux composites a matrice céramique a renforts de fibres continus, unidirectionnels (1D), renforcés dans le plan (2D) et multidirectionnels xD avec (2 < x 3), conformément a l'ENV 13233, sollicités suivant un axe principal de renfort.
NOTE Il convient de ne pas utiliser la méthode pour obtenir des valeurs absolues de résistance a des fins conceptuelles.
Advanced technical ceramics - Mechanical properties of ceramic composites at room temperature - Part 3: Determination of flexural strength
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 658-3:2004
01-januar-2004
1DGRPHãþD
SIST ENV 658-3:2000
Advanced technical ceramics - Mechanical properties of ceramic composites at
room temperature - Part 3: Determination of flexural strength
Advanced technical ceramics - Mechanical properties of ceramic composites at room
temperature - Part 3: Determination of flexural strength
Hochleistungskeramik - Mechanische Eigenschaften von keramischen
Verbundwerkstoffen bei Raumtemperatur - Teil 3: Bestimmung der Biegefestigkeit
Céramiques techniques avancées - Propriétés mécaniques des céramiques composites
a température ambiante - Détermination de la résistance en flexion
Ta slovenski standard je istoveten z: EN 658-3:2002
ICS:
81.060.30 Sodobna keramika Advanced ceramics
SIST EN 658-3:2004 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
SIST EN 658-3:2004
---------------------- Page: 2 ----------------------
SIST EN 658-3:2004
EUROPEAN STANDARD
EN 658-3
NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2002
ICS 81.060.30
Supersedes ENV 658-3:1992
English version
Advanced technical ceramics - Mechanical properties of ceramic
composites at room temperature - Part 3: Determination of
flexural strength
Céramiques techniques avancées - Propriétés mécaniques Hochleistungskeramik - Mechanische Eigenschaften von
des céramiques composites à température ambiante - keramischen Verbundwerkstoffen bei Raumtemperatur -
Détermination de la résistance en flexion Teil 3: Bestimmung der Biegefestigkeit
This European Standard was approved by CEN on 6 July 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 658-3:2002 E
worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN 658-3:2004
EN 658-3:2002 (E)
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 Data recording system .5
5.4 Dimension measuring devices .5
6 Test specimens .5
7 Test specimen preparation .6
7.1 Machining and preparation.6
7.2 Number of test specimens.6
8 Test procedures .7
8.1 Displacement rate .7
8.2 Measurement of dimensions .7
8.3 Testing technique .7
8.4 Test validity .8
9 Calculation of results .8
9.1 Test specimen origin .8
9.2 Flexural strength.8
10 Test report .9
Bibliography .11
2
---------------------- Page: 4 ----------------------
SIST EN 658-3:2004
EN 658-3:2002 (E)
Foreword
This document (EN 658-3:2002) 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 February 2003, and conflicting national standards shall be withdrawn at the latest
by February 2003.
This document supersedes ENV 658-3:1992.
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.
EN 658 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.
3
---------------------- Page: 5 ----------------------
SIST EN 658-3:2004
EN 658-3:2002 (E)
1 Scope
This part of EN 658 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 < or = 3) as defined in ENV 13233, loaded along one principal
axis of reinforcement.
NOTE The method should not be used to obtain absolute values of strength for design purposes.
2 Normative references
This European Standard incorporates by dated or undated reference, provisions from other publications. These
normative references are cited at the appropriate places in the text, and the publications are listed hereafter. For
dated references, subsequent amendments to or revisions of any of these publications apply to this European
Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the
publication referred to applies (including amendments).
EN ISO 7500-1, Metallic materials - Verification of static uniaxial testing machines - Part 1: Tension/compression
testing machines (ISO 7500-1:1999).
ENV 13233,
ISO 3611, Micrometer callipers for external measurements.
3 Principle
A test specimen of specified dimensions is flexion loaded to fracture in such a way that failure occurs in tension or
compression along one principal axis of reinforcement. The test is performed at constant crosshead displacement
rate.
4 Terms, definitions and symbols
For the purposes of this European Standard, the following terms, definitions and symbols and those given in
ENV 13233 apply.
4.1
maximum flexural force, F
m
highest recorded force in a flexural test on the test specimen when tested to failure
4.2
flexural stress, s
the nominal stress on the outer surface of the test specimen, calculated at mid-span
NOTE This stress is conventionally calculated according to the beam theory, whose basic assumptions cannot be met by
ceramic matrix composite materials.
4.3
flexural strength, s
f,m
maximum flexural stress applied to a test specimen that fractures during a flexural test
4
---------------------- Page: 6 ----------------------
SIST EN 658-3:2004
EN 658-3:2002 (E)
5 Apparatus
5.1 Test machine
The machine shall be equipped w
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.