CEN/TS 15867:2009
(Main)Advanced technical ceramics - Ceramic composites - Guide to the determination of the degree of misalignment in uniaxial mechanical tests
Advanced technical ceramics - Ceramic composites - Guide to the determination of the degree of misalignment in uniaxial mechanical tests
This document is a guide that describes a procedure:
to verify the degree of misalignment of the load train of the test machines using a reference test specimen uniformly loaded in tension or in compression;
to give indications in order to correct defects such as torsion and bending.
This document is not intended to provide a quantitative and acceptable limit, before the testing of ceramic matrix composites with a fibre reinforcement: unidirectional (1D), bidirectional (2D) and tridirectional (xD, with 2 < x 3) loaded along one principle axis of reinforcement. This limit depends on the sensitivity of each type of composite to the misalignment defect.
NOTE 1 This limit is to be defined between the testing establishment and the customer.
NOTE 2 Monolithic ceramics are very sensitive to misalignment defects, while CMCs (ceramic matrix composite) in general are moderately sensitive to them.
Hochleistungskeramik - Keramische Verbundwerkstoffe - Anleitung zur Bestimmung der Fluchtungsfehler bei mechanischen Prüfungen mit einachsiger Beanspruchung
Diese Technische Spezifikation enthält eine Anleitung zur:
⎯ Prüfung des Grades der Fehlausrichtung (die Größe des Fluchtungsfehlers) des Krafteinleitungssystems
einer Prüfmaschine, indem eine Referenzprobe einer gleichmäßigen Zug- oder Druckbeanspruchung
ausgesetzt wird;
- Korrektur von Fehlern, z. B. von Torsions- und Biegefehlern.
In diesem Dokument wird keine quantitative Grenze und keine Annahmegrenze für Fluchtungsfehler
angegeben, bevor Verbundwerkstoffe mit keramischer Matrix und unidirektionaler (1D), bidirektionaler (2D)
sowie dreidirektionaler (xD, mit 2 < x ≤ 3) Faserverstärkung einer Prüfung unter einer Beanspruchung entlang
einer der Verstärkungshauptachsen unterzogen werden. Diese Grenze hängt von der Empfindlichkeit des
jeweiligen Verbundwerkstoffs gegenüber Fluchtungsfehlern ab.
ANMERKUNG 1 Diese Grenze ist zwischen Prüfstelle und Kunden zu vereinbaren.
ANMERKUNG 2 Gegenüber Fluchtungsfehlern sind monolithische Keramiken sehr empfindlich, während Verbundwerkstoffe
mit keramischer Matrix (CMCs) im Allgemeinen eine nur mäßige Empfindlichkeit zeigen.
Céramiques techniques avancées - Céramiques composites - Guide pour déterminer le degré de non-alignement des essais mécaniques uniaxiaux
La présente Spécification Technique contient des lignes directrices relatives à :
- la vérification du degré de non-alignement du système de mise en charge des machines d’essai au
moyen dune éprouvette de référence subissant une tension ou une compression uniforme ;
- la correction des défauts dus à la torsion et à la flexion, par exemple.
Le présent document nest pas conçu pour fournir une limite quantitative acceptable avant les essais sur les
composites à matrice céramique avec un renfort de fibres : unidirectionnel (1D), bidirectionnel (2D) et
tridirectionnel (xD, avec 2 < x ≤ 3) le long dun axe principal de renfort. Cette limite dépend de la sensibilité de
chaque type de composite au défaut dalignement.
NOTE 1 Cette limite doit être définie entre létablissement dessai et le client.
NOTE 2 Les céramiques monolithiques sont très sensibles aux défauts dalignement, tandis que les composites à
matrice céramique (CMC) y sont généralement modérément sensibles.
Sodobna tehnična keramika - Keramični kompoziti - Vodilo za ugotavljanje stopnje neporavnanosti pri enoosnih mehanskih preskusih
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-maj-2009
6RGREQDWHKQLþQDNHUDPLND.HUDPLþQLNRPSR]LWL9RGLOR]DXJRWDYOMDQMHVWRSQMH
QHSRUDYQDQRVWLSULHQRRVQLKPHKDQVNLKSUHVNXVLK
Advanced technical ceramics - Ceramic composites - Guide to the determination of the
degree of misalignment in uniaxial mechanical tests
Hochleistungskeramik - Keramische Verbundwerkstoffe - Anleitung zur Bestimmung der
Fluchtungsfehler bei mechanischen Prüfungen mit einachsiger Beanspruchung
Céramiques techniques avancées - Céramiques composites - Guide pour déterminer le
degré de non-alignement des essais mécaniques uniaxiaux
Ta slovenski standard je istoveten z: CEN/TS 15867:2009
ICS:
81.060.30 Sodobna keramika Advanced ceramics
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
TECHNICAL SPECIFICATION
CEN/TS 15867
SPÉCIFICATION TECHNIQUE
TECHNISCHE SPEZIFIKATION
March 2009
ICS 81.060.30
English Version
Advanced technical ceramics - Ceramic composites - Guide to
the determination of the degree of misalignment in uniaxial
mechanical tests
Céramiques techniques avancées - Céramiques Hochleistungskeramik - Keramische Verbundwerkstoffe -
composites - Guide pour déterminer le degré de non- Anleitung zur Bestimmung der Fluchtungsfehler bei
alignement des essais mécaniques uniaxiaux mechanischen Prüfungen mit einachsiger Beanspruchung
This Technical Specification (CEN/TS) was approved by CEN on 3 February 2009 for provisional application.
The period of validity of this CEN/TS is limited initially to three years. After two years the members of CEN will be requested to submit their
comments, particularly on the question whether the CEN/TS can be converted into a European Standard.
CEN members are required to announce the existence of this CEN/TS in the same way as for an EN and to make the CEN/TS available
promptly at national level in an appropriate form. It is permissible to keep conflicting national standards in force (in parallel to the CEN/TS)
until the final decision about the possible conversion of the CEN/TS into an EN is reached.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, 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: Avenue Marnix 17, B-1000 Brussels
© 2009 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN/TS 15867:2009: E
worldwide for CEN national Members.
Contents Page
Foreword .3
1 Scope .4
2 Normative references .4
3 Terms and definitions .4
4 Principle .5
5 Apparatus .6
5.1 Test machine .6
5.2 Strain gauges .6
5.3 Data recording system .7
5.4 Micrometers .7
6 Reference test specimens .7
7 Reference test specimens preparation .9
7.1 Adhesion of strain gauges .9
7.2 Reference test specimen validity .9
8 Test procedure .9
8.1 General .9
8.2 Correction of the torsion defect .9
8.3 Correction of the C defect . 10
8.4 Correction of the S defect . 11
8.5 Final verification before starting a series of measurements on CMCs . 12
9 Test report . 12
Bibliography . 14
Foreword
This document (CEN/TS 15867:2009) has been prepared by Technical Committee CEN/TC 184 “Advanced
technical ceramics”, the secretariat of which is held by BSI.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to announce this Technical Specification: Austria, Belgium, Bulgaria, 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 the United Kingdom.
1 Scope
This Technical Specification provides guidance on:
verifying the degree of misalignment of the load train of test machines, using a reference test specimen
uniformly loaded in tension or in compression;
correcting for defects caused by, e.g. torsion and bending.
This document is not intended to provide a quantitative and acceptable limit before the testing of ceramic
matrix composites with a fibre reinforcement: unidirectional (1D), bidirectional (2D) and tridirectional (xD, with
2 < x ≤ 3) loaded along one principle axis of reinforcement. This limit depends on the sensitivity of each type
of composite to the misalignment defect.
NOTE 1 This limit is to be defined between the testing establishment and the customer.
NOTE 2 Monolithic ceramics are very sensitive to misalignment defects, while ceramic matrix composites (CMCs) in
general are moderately sensitive to them.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
CEN/TR 13233:2007, Advanced technical ceramics — Notations and symbols
EN ISO 7500-1, Metallic materials — Verification of static uniaxial testing machines — Part 1:
Tension/compression testing machines — Verification and calibration of the force measuring system
(ISO 7500-1:2004)
EN ISO/IEC 17025, General requirements for the competence of testing and calibration laboratories
(ISO/IEC 17025:2005)
ISO 3611, Micrometer callipers for external measurement
3 Terms and definitions
For the purposes of this document, the terms and definitions given in CEN/TR 13233:2007 and the following
apply.
3.1
calibrated length
l
part of the reference test specimen which has a uniform and minimum cross section area
3.2
width
b
width of the reference test specimen in the calibrated length
3.3
thickness
h
thickness of the reference test specimen in the calibrated length
3.4 Type of defects
3.4.1
C type magnitude
ΘΘΘΘ
angle between the loading axis of each of the two grips (see Figure 1)
3.4.2
S type magnitude
d
distance between the loading axis when they are parallel (see Figure 2)
3.4.3
torsion defect magnitude
ΦΦΦΦ
angle between the gripping planes (see Figure 3)
4 Principle
A rectangular cross section of a r
...
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