DIN EN ISO 17140-2016 Fine ceramics (advanced ceramics advanced technical ceramics) - Mechanical properties of ceramic composites at room temperature - Determination of fatigue pro.pdf

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1、October 2016 English price group 12No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 81.060.30!%(“2579905www.din.deDI

2、N EN ISO 17140Fine ceramics (advanced ceramics, advanced technical ceramics) Mechanical properties of ceramic composites at room temperature Determination of fatigue properties at constant amplitude (ISO 17140:2014);English version EN ISO 17140:2016,English translation of DIN EN ISO 17140:2016-10Hoc

3、hleistungskeramik Mechanische Eigenschaften von keramischen Verbundwerkstoffen bei Raumtemperatur Bestimmung der Ermdungseigenschaften bei konstanter Amplitude (ISO 17140:2014);Englische Fassung EN ISO 17140:2016,Englische bersetzung von DIN EN ISO 17140:2016-10Cramiques techniques Proprits mcanique

4、s des cramiques composites temprature ambiante Dtermination des proprits de fatigue amplitude constante (ISO 17140:2014);Version anglaise EN ISO 17140:2016,Traduction anglaise de DIN EN ISO 17140:2016-10SupersedesDIN EN 15156:200610www.beuth.deDocument comprises 22 pagesDTranslation by DIN-Sprachend

5、ienst.In case of doubt, the German-language original shall be considered authoritative.10.16 DIN EN ISO 17140:2016-10 2 A comma is used as the decimal marker. National foreword The text of ISO 17140:2014 has been prepared by Technical Committee ISO/TC 206 “Fine ceramics” and has been taken over as E

6、N ISO 17140:2016 by Technical Committee CEN/TC 184 “Advanced technical ceramics” (Secretariat: DIN, Germany). The responsible German body involved in its preparation was DIN-Normenausschuss Materialprfung (DIN Standards Committee Materials Testing), Working Committee NA 062-02-94 AA Prfung von Hochl

7、eistungskeramik Keramische Verbundwerkstoffe. The DIN Standards corresponding to the International Standards and publications referred to in this document are as follows: ISO 3611 DIN EN ISO 3611 ISO 7500-1 DIN EN ISO 7500-1 ISO 9513 DIN EN ISO 9513 ISO 14544 DIN EN ISO 14544 ISO 14574 DIN EN ISO 14

8、574 CEN/TR 13233 DIN-Fachbericht CEN/TR 13233 Amendments This standard differs from DIN EN 15156:2006-10 as follows: a) in Clause 7 “Test specimens”, a recommendation for the shape of specimens made of 1D composites has been included; b) the former NOTE to Subclause 9.2.3 has been incorporated as no

9、rmative text; c) ISO 17140:2014 has been adopted. Previous editions DIN EN 15156: 2006-10 DIN EN ISO 17140:2016-10 3 National Annex NA (informative) Bibliography DIN EN ISO 3611, Geometrical Product Specifications (GPS) Dimensional measuring equipment: Micrometers for external measurements Design an

10、d metrological characteristics DIN EN ISO 7500-1, Metallic materials Calibration and verification of static uniaxial testing machines Part 1: Tension/compression testing machines Calibration and verification of the force-measuring system DIN EN ISO 9513, Metallic materials Calibration of extensomete

11、r systems used in uniaxial testing DIN EN ISO 14544, Fine ceramics (advanced ceramics, advanced technical ceramics) Mechanical properties of ceramic composites at high temperature Determination of compression properties DIN EN ISO 14574, Fine ceramics (advanced ceramics, advanced technical ceramics)

12、 Mechanical properties of ceramic composites at high temperature Determination of tensile properties DIN-Fachbericht CEN/TR 13233, Advanced technical ceramics Notations and symbols DIN EN ISO 17140:2016-10 4 This page is intentionally blank EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 17

13、140 April 2016 ICS 81.060.30 Supersedes EN 15156:2006English Version Fine ceramics (advanced ceramics, advanced technical ceramics) - Mechanical properties of ceramic composites at room temperature - Determination of fatigue properties at constant amplitude (ISO 17140:2014) Cramiques techniques - Pr

14、oprits mcaniques des cramiques composites temprature ambiante - Dtermination des proprits de fatigue amplitude constante (ISO 17140:2014) Hochleistungskeramik - Mechanische Eigenschaften von keramischen Verbundwerkstoffen bei Raumtemperatur - Bestimmung der Ermdungseigenschaften bei konstanter Ampli

15、tude (ISO 17140:2014) 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

16、 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 r

17、esponsibility 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

18、 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 andUnited Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE N

19、ORMALISATION EUROPISCHES KOMITEE FR 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 worldwide for CEN national Members. Ref. No. EN ISO 17140:2016 EContents PageEuropean foreword 31 Scope . 52 Normativ

20、e references 53 Terms and definitions . 53.1 General . 53.2 Cyclic fatigue phenomena 74 Principle 95 Significance and use 96 Apparatus 106.1 Fatigue test machine . 106.2 Load train 106.3 Extensometer 116.4 Data recording system . 116.5 Micrometers . 117 Test specimens. 118 Test specimen preparation

21、. 128.1 Machining and preparation . 128.2 Number of test specimens 129 Test procedure . 129.1 Measurement of test specimen dimensions . 129.2 Testing technique . 139.3 Test validity . 1310 Calculation of results 1410.1 Time to failure, tf.10.2 Damage parameters. 1410.3 Residual properties 1411 Test

22、report 16Annex A (informative) Schematic evolution of E .18DIN EN ISO 17140:2016-10 EN ISO 17140:2016 (E) 2Foreword 414European foreword The text of ISO 17140:2014 has been prepared by Technical Committee ISO/TC 206 “Fine ceramics” of the International Organization for Standardization (ISO) and has

23、been taken over as EN ISO 17140:2016 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 Octobe

24、r 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 r

25、ights. This document supersedes EN 15156:2006. 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, For

26、mer 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 17140

27、:2014 has been approved by CEN as EN ISO 17140:2016 without any modification. DIN EN ISO 17140:2016-10 EN ISO 17140:2016 (E)3 ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing Internation

28、al 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,

29、 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

30、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 the possibility that some of the el

31、ements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations recei

32、ved (see www.iso.org/patents). Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adh

33、erence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informationThe committee responsible for this document is ISO/TC 206, Fine ceramics.DIN EN ISO 17140:2016-10 EN ISO 17140:2016 (E) 4 1 ScopeThis International Standard specifies the

34、conditions for the determination of properties at constant-amplitude of load or strain in uniaxial tension/tension or in uniaxial tension/compression cyclic fatigue of ceramic matrix composite materials (CMCs) with fibre reinforcement at room temperature.This International Standard applies to all ce

35、ramic matrix composites with fibre reinforcement, unidirectional (1D), bi-directional (2D), and tri-directional (xD, where 2 2) reinforcementDimensions in millimetres1D, 2D, and xD Tolerancel, calibrated length 30 to 80 0,5h, thickness 2 0,2b1, width in the calibrated length (x 2)8 to 20 0,2b2, widt

36、h B2= b1with = 1,2 to 2 0,2r, radius (x 2) 30 2Parallelism of machined parts 0,05 8 Test specimen preparation8.1 Machining and preparationDuring cutting out, care shall be taken to align the test specimen axis with the desired fibre related loading axis.Machining parameters which avoid damage to the

37、 material shall be established and documented. These parameters shall be adhered to during test specimen preparation.8.2 Number of test specimensAt least three valid test results, as specified in 9.3, are required for any condition.9 Test procedure9.1 Measurement of test specimen dimensionsThe cross

38、-section area shall be determined at the centre of the specimen and at each end of the gauge length.Dimensions shall be measured to an accuracy of 0,01 mm. The arithmetic means of the measurements shall be used for calculations.DIN EN ISO 17140:2016-10 EN ISO 17140:2016 (E) 12 9.2 Testing technique9

39、.2.1 Specimen mountingInstall the test specimen in the gripping system with its longitudinal axis coincident with that of the test machine.Care shall be taken not to induce flexural or torsional loads in the test specimen.9.2.2 Setting the extensometerIf used, install the extensometer centrally with

40、in the calibrated length.9.2.3 Measurements zero the load cell; zero the extensometer, if applicable; set the maximum number of cycles, N; for method A, set the maximum and minimum stress values; for method B, set the maximum and minimum strain values; set the frequency and the wave shape; start the

41、 fatigue test: for method A, in load control mode; for method B, in strain control mode; record the number of cycles, N, or Nf; if an extensometer is used, record the stress-strain loops up to the total number of cycles.A specific computer program is recommended to control the test. Depending on the

42、 computerized facilities used, all the loops can be recorded. If this is not possible, the following sequence can be used to record stress versus strain: every cycle for the first 10 cycles; one cycle every 10 cycles between 10 cycles and 100 cycles; one cycle every 100 cycles between 100 cycles and

43、 1 000 cycles; one cycle every 1 000 cycles between 1 000 cycles and 10 000 cycles; etc.9.3 Test validityThe following circumstances shall invalidate a test for the determination of the lifetime duration: failure to specify and record test conditions; specimen slippage in the grips.In addition, the

44、following circumstances shall invalidate a test for the determination of the damage parameter: extensometer slippage;DIN EN ISO 17140:2016-10 EN ISO 17140:2016 (E)13 extensometer drift.10 Calculation of results10.1 Time to failure, tfCalculate the time to failure in accordance with the following for

45、mula:tNfffhours()=3600whereNfis the number of cycles required to obtain failure of the test specimen;f is the frequency, in hertz (Hz).10.2 Damage parametersCalculate the damage parameter, Dn, for each recorded cycle, n, in accordance with the following formula:DEEnn,app1,app=1 whereDnis the damage

46、parameter at the nthfatigue cycle;En,appis the secant modulus at the nthfatigue loop (see Figure 4);E1,appis the secant modulus at the first fatigue loop (see Figure 4);En,appis equal to maxmaxnresidual(see Figure 4).nresidualis equal to unll+2see Figure 4 b).The damage parameters, Dn, nmax, nresidu

47、al, can be plotted versus the number of cycles, N. For N, a log scale is almost always used, although a linear scale can also be used. Figures 4 a) to c) represent three cases of cyclic fatigue of CMCs.NOTE Annex A shows the schematic evolution of E under different circumstances of damage and creep.10.3 Residual propertiesWhen rupture does not occur before the end of the test, the test specimen shall be tested to rupture in accordance with ISO 14574 or ISO 15733.DIN EN ISO 17140:2016-10 EN ISO 17140:2016 (E) 14 21E1 appEn app34na) R = 02134E0E1 appEn appnb) R 0Key1 strain ()2 stress (