EN 843-2:2006

Advanced technical ceramics - Mechanical properties of monolithic ceramics at room temperature - Part 2: Determination of Young's modulus, shear modulus and Poisson's ratio

This part of EN 843 specifies methods for determining the elastic moduli, specifically Young’s modulus, shear modulus and Poisson’s ratio, of advanced monolithic technical ceramics at room temperature. This European Standard prescribes four alternative methods for determining some or all of these three parameters:
A   The determination of Young’s modulus by static flexure of a thin beam in three- or four-point flexure.
B   The determination of Young’s modulus by forced longitudinal resonance, or Young’s modulus, shear modulus and Poisson’s ratio by forced flexural and torsional resonance, of a thin beam.
C    The determination of Young’s modulus, shear modulus and Poisson’s ratio from the time-of-flight of an ultrasonic pulse.
D   The determination of Young’s modulus from the fundamental natural frequency of a struck bar (impulse excitation method).
All the test methods assume the use of homogeneous test pieces of linear elastic materials.
NOTE 1   Not all ceramic materials are equally and linearly elastic in tension and compression, such as some porous materials and some piezoelectric materials.
With the exception of Method C, the test assumes that the test piece has isotropic elastic properties. Method C may be used to determine the degree of anisotropy by testing in different orientations.
NOTE 2   An ultrasonic method for dealing with anisotropic materials (ceramic matrix composites) can be found in
ENV 14186 (see Bibliography). An alternative to Method D for isotropic materials using disc test pieces is given in
Annex A.
NOTE 3   At high porosity levels all of the methods except Method C can become inappropriate. The methods are only suitable for a maximum grain size (see EN 623-3), excluding deliberately added whiskers, of less than 10 % of the minimum dimension of the test piece.
NOTE 4   The different methods given in this European Standard can produce slightly different results on the same material owing to differences between quasi-isothermal quasi-static an

Hochleistungskeramik - Mechanische Eigenschaften monolithischer Keramik bei Raumtemperatur - Teil 2: Bestimmung des Elastizitätsmoduls, Schubmoduls und der Poissonzahl

Dieser Teil von EN 843 legt Verfahren zur Bestimmung der elastischen Moduln, speziell des
Elastizitätsmoduls, des Schubmoduls und der Poissonzahl von keramischen Hochleistungswerkstoffen bei
Raumtemperatur fest. Die Norm legt vier alternativ anwendbare Verfahren für die Bestimmung eines oder aller
dieser drei Parameter fest:
A Bestimmung des Elastizitätsmoduls durch statische Biegung eines dünnen Stabes bei Drei- oder Vier-
Punkt-Biegung.
B Bestimmung des Elastizitätsmoduls durch erzwungene longitudinale Schwingung oder des
Elastizitätsmoduls, Schubmoduls und der Poissonzahl durch erzwungene Biege- oder Torsions-
schwingungen eines dünnen Stabes.
C Bestimmung des Elastizitätsmoduls, Schubmoduls und der Poissonzahl aus der Laufzeit eines
Ultraschallimpulses.
D Bestimmung des Elastizitätsmoduls durch die Grundeigenschwingung eines angestoßenen Stabes (Stoß-
oder Impulsanregungs-Verfahren).
Alle Prüfverfahren setzen aus homogenen linearelastischen Werkstoffen gefertigte Probekörper voraus.
ANMERKUNG 1 Nicht alle Keramikwerkstoffe sind bei Zugspannung und Druck gleichmäßig und linear elastisch,
beispielsweise einige poröse und piezoelektrische Werkstoffe.
Mit Ausnahme von Verfahren C wird bei der Prüfung vorausgesetzt, dass der Probekörper isotrope elastische
Eigenschaften besitzt. Verfahren C kann angewendet werden, um den Grad an Anisotropie in unterschied-
lichen Richtungen zu bestimmen.
ANMERKUNG 2 Ein Ultraschallverfahren zur Prüfung von anisotropen Werkstoffen (Verbundwerkstoffe mit keramischer
Matrix) ist in ENV 14186 gegeben.
Bei hohen Porositätsgraden können sich alle Verfahren als ungeeignet erweisen. Die maximale Korngröße
(siehe EN 623-3), ausgenommen absichtlich eingebrachte Whisker, muss 10 % kleiner als das kleinste Maß
des Probekörpers sein.

Céramiques techniques avancées - Propriétés mécaniques des céramiques monolithiques à température ambiante - Partie 2: Détermination du module de Young, du module de cisaillement et du coefficient de Poisson

La présente partie de l’EN 843 spécifie des méthodes de détermination des modules élastiques, notamment du module de Young, du module de cisaillement et du coefficient de Poisson des céramiques techniques avancées monolithiques à température ambiante. La présente Norme européenne prescrit quatre méthodes au choix permettant de déterminer la totalité de ces trois paramètres ou certains :
A   Détermination du module de Young par flexion statique d’une barre mince en trois et quatre points.
B   Détermination du module de Young par résonance longitudinale forcée ou du module de Young, du module de cisaillement et du coefficient de Poisson par résonance forcée en flexion et en torsion d’une barre mince.
C   Détermination du module de Young, du module de cisaillement et du coefficient de Poisson à partir du temps de vol d’une impulsion ultrasonique.
D   Détermination du module de Young à partir de la fréquence naturelle fondamentale de la barre percutée (méthode d’excitation par impulsions).
Toutes ces méthodes d’essai supposent l’utilisation d’éprouvettes homogènes en matériaux présentant une élasticité linéaire.
NOTE 1   Les matériaux céramiques ne présentent pas tous la même élasticité linéaire en traction et en compression, comme par exemple certains matériaux poreux et certains matériaux piézoélectriques.
Sauf pour la méthode C, l’essai suppose que l’éprouvette a des propriétés élastiques isotropes. La méthode C peut être utilisée pour déterminer le degré d’anisotropie en procédant aux essais dans différentes orientations.
NOTE 2   L’ENV 14186 [1] spécifie une méthode par ultrasons pour traiter les matériaux anisotropes (composites à matrice céramique). L’annexe A présente une méthode autre que la méthode D pour les matériaux isotropes et ce, à l’aide d’éprouvettes en forme de disques.

Sodobna tehnična keramika - Monolitna keramika - Mehanske lastnosti pri sobni temperaturi – 2. del: Določevanje elastičnega modula (Youngov modul), strižnega modula in Poissonovega števila

General Information

• Status: Published
• Publication Date: 12-Dec-2006
• ICS: 81.060.30 - Advanced ceramics
• Technical Committee: CEN/TC 184 - Advanced technical ceramics
• Drafting Committee: CEN/TC 184/WG 3 - Monolithic ceramics
• Current Stage: 9020 - Submission to 2 Year Review Enquiry - Review Enquiry
• Start Date: 15-Jul-2024
• Completion Date: 15-Jul-2024
• 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 843-2:2007 - Advanced technical ceramics - Mechanical properties of monolithic ceramics at room temperature - Part 2: Determination of Young's modulus, shear modulus and Poisson's ratio

Relations

• Replaces: ENV 843-2:1995 - Advanced technical ceramics - Monolithic ceramics - Mechanical properties at room temperature - Part 2: Determination of elastic moduli
• Effective Date: 22-Dec-2008

Standards Content (Sample)

SLOVENSKI STANDARD
01-maj-2007
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SIST ENV 843-2:2000
6RGREQDWHKQLþQDNHUDPLND0RQROLWQDNHUDPLND0HKDQVNHODVWQRVWLSULVREQL
WHPSHUDWXUL±GHO'RORþHYDQMHHODVWLþQHJDPRGXOD PRGXODLQ3RLVVRQRYHJDãWHYLOD
Advanced technical ceramics - Mechanical properties of monolithic ceramics at room
temperature - Part 2: Determination of Young's modulus, shear modulus and Poisson's
ratio
Hochleistungskeramik - Mechanische Eigenschaften monolithischer Keramik bei
Raumtemperatur - Teil 2: Bestimmung des Elastizitätsmoduls, Schubmoduls und der
Poissonzahl
Céramiques techniques avancées - Propriétés mécaniques des céramiques
monolithiques a température ambiante - Partie 2: Détermination du module d'Young, du
module de cisaillement et du coefficient de Poisson
Ta slovenski standard je istoveten z: EN 843-2:2006
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 843-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2006
ICS 81.060.30 Supersedes ENV 843-2:1995
English Version
Advanced technical ceramics - Mechanical properties of
monolithic ceramics at room temperature - Part 2: Determination
of Young's modulus, shear modulus and Poisson's ratio
Céramiques techniques avancées - Propriétés mécaniques Hochleistungskeramik - Mechanische Eigenschaften
des céramiques monolithiques à température ambiante - monolithischer Keramik bei Raumtemperatur - Teil 2:
Partie 2: Détermination du module d'Young, du module de Bestimmung des Elastizitätsmoduls, Schubmoduls und der
cisaillement et du coefficient de Poisson Poissonzahl
This European Standard was approved by CEN on 11 November 2006.
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 Central Secretariat 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 Central Secretariat has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,
Slovakia, Slovenia, 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
© 2006 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 843-2:2006: E
worldwide for CEN national Members.

Contents Page
Foreword.4
1 Scope.5
2 Normative references.5
3 Terms and definitions .6
4 Method A: Static flexure method.6
4.1 Principle.6
4.2 Apparatus.7
4.3 Test pieces.8
4.4 Procedure.8
4.5 Calculations.11
4.6 Measurement uncertainty.13
5 Method B: Resonance method.13
5.1 Principle.13
5.2 Apparatus.13
5.3 Test pieces.14
5.4 Procedure.16
5.5 Calculations.18
5.6 Measurement uncertainty.20
6 Method C: Ultrasonic method.20
6.1 Principle.20
6.2 Apparatus.20
6.3 Test pieces.22
6.4 Test method.22
6.5 Calculations.23
6.6 Measurement uncertainty.23
7 Method D: Impulse excitation method.24
7.1 Principle.24
7.2 Apparatus.24
7.3 Test pieces.24
7.4 Procedure.24
7.5 Calculations.27
7.6 Measurement uncertainty.27
8 Report.28
8.1 General.28
8.2 Method A.28
8.3 Method B.28
8.4 Method C.29
8.5 Method D.29
Annex A (informative) Impact excitation method applied to disc test pieces.30
A.1 Scope.30
A.2 Apparatus.30
A.3 Test pieces.30
A.4 Principle.30
A.5 Method.31
A.6 Calculations.32
A.7 Interferences.32
A.8 Measurement uncertainty.33
A.9 Report.33
Annex B (informative) Round-robin validation of test methods .37
B.1 Objectives.37
B.2 Materials.37
B.3 Test facilities.37
B.4 Results.37
B.5 Conclusions.38
Bibliography.39

Foreword
This document (EN 843-2:2006) 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 2007, and conflicting national standards shall be withdrawn at
the latest by June 2007.
This document supersedes ENV 843-2:1995.
EN 843 Advanced technical ceramics — Mechanical properties of monolithic ceramics at room temperature
comprises six parts:
Part 1: Determination of flexural strength
Part 2: Determination of Young’s modulus, shear modulus and Poisson’s ratio
Part 3: Determination of subcritical crack growth parameters from constant stressing rate flexural strength
tests
Part 4: Vickers, Knoop and Rockwell superficial hardness
Part 5: Statistical analysis
Part 6: Guidance for fractographic investigation
At the time of publication of this Revision of Part 2, Part 6 was available as a Technical Specification.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden,
Switzerland and United Kingdom.
1 Scope
This part of EN 843 specifies methods for determining the elastic moduli, specifically Young’s modulus, shear
modulus and Poisson’s ratio, of advanced monolithic technical ceramics at room temperature. This European
Standard prescribes four alternative methods for determining some or all of these three parameters:
A The determination of Young’s modulus by static flexure of a thin beam in three- or four-point flexure.
B The determination of Young’s modulus by forced longitudinal resonance, or Young’s modulus, shear
modulus and Poisson’s ratio by forced flexural and torsional resonance, of a thin beam.
C The determination of Young’s modulus, shear modulus and Poisson’s ratio from the time-of-flight of an
ultrasonic pulse.
D The determination of Young’s modulus from the fundamental natural frequency of a struck bar (impulse
excitation method).
All the test methods assume the use of homogeneous test pieces of linear elastic materials.
NOTE 1 Not all ceramic materials are equally and linearly elastic in tension and compression, such as some porous
materials and some piezoelectric materials.
With the exception of Method C, the test assumes that the test piece has isotropic elastic properties. Method C
may be used to determine the degree of anisotropy by testing in different orientations.
NOTE 2 An ultrasonic method for dealing with anisotropic materials (ceramic matrix composites) can be found in
ENV 14186 [1]. An alternat
...