SIST EN ISO 17161:2016

Fine ceramics (advanced ceramics, advanced technical ceramics) - Ceramic composites - Determination of the degree of misalignment in uniaxial mechanical tests (ISO 17161:2014)

ISO 17161:2014 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, and to give indications in order to correct defects such as torsion and bending.
ISO 17161:2014 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 principal axis of reinforcement. This limit depends on the sensitivity of each type of composite to the misalignment defect.

Hochleistungskeramik - Keramische Verbundwerkstoffe - Bestimmung der Fluchtungsfehler bei mechanischen Prüfungen mit einachsiger Beanspruchung (ISO 17161:2014)

Diese Internationale Norm beschreibt ein Verfahren:
—   zur Verifizierung der Fluchtungsfehler des Krafteinleitungssystems einer Prüfmaschine, indem ein Referenzprobekörper gleichmäßig auf Zug oder Druck beansprucht wird; und
—   um Hinweise zu Fehlern zu liefern, z. B. Torsions- und Biegefehler, um diese zu korrigieren.
Diese Internationale Norm ist nicht vorgesehen, um eine quantitative und zulässige Grenze anzugeben vor der Prüfung von Verbundwerkstoffen mit keramischer Matrix und unidirektionaler (1D), bidirektionaler (2D) sowie mehrdirektionaler (xD, mit 2 < x ≤ 3) Faserverstärkung, die entlang einer der Verstärkungshauptachsen beansprucht werden. Diese Grenze hängt von der Empfindlichkeit des jeweiligen Verbundwerkstoffes gegenüber den Fluchtungsfehlern ab.
ANMERKUNG 1   Diese Grenze wird zwischen Prüfstelle und Auftraggeber vereinbart.
ANMERKUNG 2   Monolithische Keramikwerkstoffe sind gegenüber Fluchtungsfehlern sehr empfindlich, während Verbundwerkstoffe mit keramischer Matrix (en: ceramic matrix composite, CMC) im Allgemeinen eine nur mäßige Empfindlichkeit aufweisen.

Céramiques techniques - Céramiques composites - Détermination du degré de non-alignement lors des essais mécaniques uniaxiaux (ISO 17161:2014)

L'ISO 17161:2014 décrit une procédure pour vérifier le degré de non-alignement du système de mise en charge des machines d'essai au moyen d'une éprouvette de référence soumise à un chargement uniforme de traction ou de compression et pour donner des indications afin de corriger des défauts tels que la torsion et la flexion.
L'ISO 17161:2014 n'est pas conçue 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 d'un axe principal de renforcement. Cette limite dépend de la sensibilité de chaque type de composite au défaut d'alignement.

Fina keramika (sodobna keramika, sodobna tehnična keramika) - Keramični kompoziti - Ugotavljanje stopnje neporavnanosti pri enoosnih mehanskih preskusih (ISO 17161:2014)

Ta mednarodni standard opisuje postopek
– za preverjanje stopnje neporavnanosti vozička za nalaganje preskusnih strojev z uporabo referenčnega preskusnega primerka, enotno naloženega v raztezanje ali v stiskanje, in – za podajanje indikacij z namenom odpravljanja pomanjkljivosti, kot sta torzija in zvijanje. Ta mednarodni standard ni namenjen za zagotavljanje količinske in sprejemljive omejitve pred preskušanjem keramičnih matričnih kompozitov z ojačitvijo vlaken: enosmerno (1D), dvosmerno (2D) in trismerno (xD, z 2 < x ≤ 3), naloženih vzdolž ene glavne osi ojačitve. Ta omejitev je odvisna od občutljivosti posamezne vrste kompozita na učinek neporavnanosti.

General Information

• Status: Published
• Public Enquiry End Date: 29-Nov-2015
• Publication Date: 16-May-2016
• ICS: 81.060.30 - Advanced ceramics
• Technical Committee: I13 - Imaginarni 13
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 06-May-2016
• Due Date: 11-Jul-2016
• Completion Date: 17-May-2016
• Ref Project: EN ISO 17161:2016 - Fine ceramics (advanced ceramics, advanced technical ceramics) - Ceramic composites - Determination of the degree of misalignment in uniaxial mechanical tests (ISO 17161:2014)

Relations

• Replaces: SIST-TS CEN/TS 15867:2009 - Advanced technical ceramics - Ceramic composites - Guide to the determination of the degree of misalignment in uniaxial mechanical tests
• Effective Date: 01-Jun-2016

Overview - EN ISO 17161:2016 (ISO 17161:2014)

EN ISO 17161:2016 specifies a practical procedure to verify and detect misalignment of the load train in uniaxial mechanical tests of ceramic composites. The standard uses a rectangular reference test specimen equipped with strain gauges to reveal defects such as torsion and bending (C- and S-type). It gives indications to correct these defects prior to testing ceramic matrix composites (CMCs), but it does not prescribe universal quantitative acceptance limits - those limits must be agreed between the testing laboratory and the customer.

Keywords: EN ISO 17161:2016, ceramic composites, misalignment, uniaxial mechanical tests, CMC, strain gauges, load train.

Key topics and technical requirements

• Purpose: Verify degree of misalignment of the load train and provide correction guidance for torsion and bending defects.
• Reference specimen: Rectangular cross-section specimen with specified gauge locations (10 strain gauges, including a rosette) to measure local strains and defect magnitudes.
• Loading conditions: Specimen is loaded in tension or compression to a level corresponding to 10% of the nominal load capacity of the load cell used for CMC tests; the stress must not exceed 50% of the specimen material’s elastic limit.
• Defect types measured:
  • C-type (bending) - angle between grip loading axes,
  • S-type (bending) - parallel axis offset distance,
  • Torsion - angle between gripping planes.
• Data and correction: Compare strain gauge outputs with values from precomputed charts (numerical simulations) to determine and correct misalignment.
• Apparatus and calibration: Test machine and load train must match the configuration used for subsequent CMC tests and conform to ISO 7500-1 for force measurement verification.
• Specimen validity checks: Periodic verification of strain gauge response by comparing Young’s modulus at each gauge location to the original value; differences should not exceed 5% (recommended annually).

Applications and users

This standard is intended for:

• Test laboratories and calibration facilities performing mechanical testing of ceramic matrix composites (CMCs),
• Manufacturers and R&D teams of advanced ceramics and ceramic composites,
• Quality assurance and certification bodies that must ensure test-machine alignment before mechanical property evaluation.

Practical value: ensures reliable, repeatable uniaxial test results by detecting and enabling correction of load-train misalignment that can bias strength, stiffness, or failure-mode data.

Related standards

• ISO 7500-1 - Verification of static uniaxial testing machines (force-measuring system)
• ISO 3611 - Micrometers for external measurements
• ISO/IEC 17025 - Competence of testing and calibration laboratories
• CEN/TR 13233:2007 - Notations and symbols for advanced technical ceramics

Using EN ISO 17161:2016 helps laboratories minimize misalignment-induced errors in uniaxial testing of advanced ceramics and CMCs, improving test reliability and customer confidence.

Standards Content (Sample)

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01-junij-2016
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Fine ceramics (advanced ceramics, advanced technical ceramics) - Ceramic composites
- Determination of the degree of misalignment in uniaxial mechanical tests (ISO
17161:2014)
Hochleistungskeramik - Keramische Verbundwerkstoffe - Bestimmung der
Fluchtungsfehler bei mechanischen Prüfungen mit einachsiger Beanspruchung (ISO
17161:2014)
Céramiques techniques - Céramiques composites - Détermination du degré de non-
alignement lors des essais mécaniques uniaxiaux (ISO 17161:2014)
Ta slovenski standard je istoveten z: EN ISO 17161:2016
ICS:
81.060.30 Sodobna keramika Advanced ceramics
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 17161
EUROPEAN STANDARD
NORME EUROPÉENNE
April 2016
EUROPÄISCHE NORM
ICS 81.060.30 Supersedes CEN/TS 15867:2009
English Version
Fine ceramics (advanced ceramics, advanced technical
ceramics) - Ceramic composites - Determination of the
degree of misalignment in uniaxial mechanical tests (ISO
17161:2014)
Céramiques techniques - Céramiques composites - Hochleistungskeramik - Keramische
Détermination du degré de non-alignement lors des Verbundwerkstoffe - Bestimmung der
essais mécaniques uniaxiaux (ISO 17161:2014) Fluchtungsfehler bei mechanischen Prüfungen mit
einachsiger Beanspruchung (ISO 17161:2014)
This European Standard was approved by CEN on 25 March 2016.

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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2016 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 17161:2016 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
The text of ISO 17161:2014 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 17161:2016
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 October 2016, and conflicting national standards shall
be withdrawn at the latest by October 2016
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.
This document supersedes CEN/TS 15867:2009.
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, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 17161:2014 has been approved by CEN as EN ISO 17161:2016 without any modification.
INTERNATIONAL ISO
STANDARD 17161
First edition
2014-04-01
Fine ceramics (advanced ceramics,
advanced technical ceramics) —
Ceramic composites — Determination
of the degree of misalignment in
uniaxial mechanical tests
Céramiques techniques — Céramiques composites — Détermination
du degré de non-alignement lors des essais mécaniques uniaxiaux
Reference number
ISO 17161:2014(E)
©
ISO 2014
ISO 17161:2014(E)
© ISO 2014
All rights reserved. Unless otherwise specified, 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 the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
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Published in Switzerland
ii © ISO 2014 – All rights reserved

ISO 17161:2014(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
3.1 General . 1
3.2 Type of defects . 2
4 Principle . 2
5 Apparatus . 3
5.1 Test machine . 3
5.2 Load train. 4
5.3 Strain gauges . 4
5.4 Data recording system . 4
5.5 Micrometers . 4
6 Reference test specimens . 4
7 Reference test specimen preparation . 6
7.1 Adhesion of strain gauges . 6
7.2 Reference test specimen validity . 6
8 Test procedure . 6
8.1 General . 6
8.2 Correction of the torsion defect . 6
8.3 Correction of the C defect . 7
8.4 Correction of the S defect . 8
8.5 Final verification before starting a series of measurements on CMCs . 9
9 Test report . 9
Bibliography .10
ISO 17161:2014(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to
...