DIN EN ISO 20504-2016 Fine ceramics (advanced ceramics advanced technical ceramics) - Test method for compressive behaviour of continuous fibre-reinforced composites at room temper.pdf

1、October 2016 English price group 14No 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!%nL“2577541www.din.deD

2、IN EN ISO 20504Fine ceramics (advanced ceramics, advanced technical ceramics) Test method for compressive behaviour of continuous fibrereinforced composites at room temperature (ISO 20504:2006);English version EN ISO 20504:2016,English translation of DIN EN ISO 20504:2016-10Hochleistungskeramik Best

3、immung der Eigenschaften unter Druck von endlosfaserverstrkten Verbundwerkstoffen bei Raumtemperatur (ISO 20504:2006);Englische Fassung EN ISO 20504:2016,Englische bersetzung von DIN EN ISO 20504:2016-10Cramiques techniques Mthode dessai de rsistance la compression des composites renforcs de fibres

4、continues temprature ambiante (ISO 20504:2006);Version anglaise EN ISO 20504:2016,Traduction anglaise de DIN EN ISO 20504:2016-10SupersedesDIN EN 6582:200303www.beuth.deDocument comprises 30 pagesDTranslation by DIN-Sprachendienst.In case of doubt, the German-language original shall be considered au

5、thoritative.10.16 DIN EN ISO 20504:2016-10 2 A comma is used as the decimal marker. National foreword The text of ISO 20504:2006 has been prepared by Technical Committee ISO/TC 206 “Fine ceramics” and has been taken over as EN ISO 20504:2016 by Technical Committee CEN/TC 184 “Advanced technical cera

6、mics” (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 Hochleistungskeramik Keramische Verbundwerkstoffe. The DIN Standards correspondi

7、ng to the International Standards 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 14126 DIN EN ISO 14126 Amendments This standard differs from DIN EN 658-2:2003-03 as follows: a) further terms and definitions have been i

8、ncluded in Clause 3; b) in Subclause 5.3.2, recommendations for the dimensions of strain gauges have been included; c) in Figure 1, an example of anti-buckling guides has been added; d) Clause 9 “Calculation of results” has been supplemented by 9.5 “Buckling stress”, 9.6 “Rounding of results” and 9.

9、7 “Mean and standard deviation”; e) Clause 10 “Test report” has been expanded; f) Annex A “Illustration of elastic modulus”, Annex B “Alignment verification” and Annex C “Compressive force limits to ensure true compressive failure” have been added; g) ISO 20504:2006 has been adopted. Previous editio

10、ns DIN V ENV 658-2: 1993-05 DIN EN 658-2: 2003-03 DIN EN ISO 20504:2016-10 3 National Annex NA (informative) Bibliography DIN EN ISO 3611, Geometrical Product Specifications (GPS) Dimensional measuring equipment: Micrometers for external measurements Design and metrological characteristics DIN EN IS

11、O 7500-1, Metallic materials Verification of static uniaxial testing machines Part 1: Tension/compression testing machines Verification and calibration of the force-measuring system DIN EN ISO 9513, Metallic materials Calibration of extensometer systems used in uniaxial testing DIN EN ISO 14126, Fib

12、re-reinforced plastic composites Determination of compressive properties in the in-plane direction DIN EN ISO 20504:2016-10 4 This page is intentionally blank EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 20504 April 2016 ICS 81.060.30 Supersedes EN 658-2:2002English Version Fine ceramics

13、 (advanced ceramics, advanced technical ceramics) - Test method for compressive behaviour of continuous fibre-reinforced composites at room temperature (ISO 20504:2006) Cramiques techniques - Mthode dessai de rsistance la compression des composites renforcs de fibres continues temprature ambiante (I

14、SO 20504:2006)Hochleistungskeramik - Bestimmung der Eigenschaften unter Druck von endlosfaserverstrkten Verbundwerkstoffen bei Raumtemperatur(ISO20504:2006) This European Standard was approved by CEN on 25 March 2016. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which st

15、ipulate 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 Europea

16、n 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 t

17、he 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, Roman

18、ia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey andUnited Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION 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 a

19、ny means reserved worldwide for CEN national Members. Ref. No. EN ISO 20504:2016 EContents Page European foreword. 3 1 Scope . 5 2 Normative references . 5 3 Terms and definitions. 5 4 Principle. 7 5 Apparatus 8 5.1 Test machine . 8 5.2 Load train. 8 5.3 Strain measurement . 8 5.3.1 General. 8 5.3.2

20、 Strain gauges 8 5.3.3 Extensometry 9 5.4 Data recording system . 9 5.5 Dimension measuring devices 9 6 Test specimens . 9 6.1 General. 9 6.2 Compression between platens.10 6.3 Test specimen used with grips . 11 7 Test specimen preparation 14 7.1 Machining and preparation 14 7.2 Number of test speci

21、mens. 14 8 Test procedure 14 8.1 Test mode and rate. 14 8.2 Measurement of test specimen dimensions 15 8.3 Buckling. 15 8.4 Testing technique . 15 8.4.1 Test specimen mounting . 15 8.4.2 Extensometers 15 8.4.3 Measurements. 16 8.5 Test validity . 16 9 Calculation of results . 16 9.1 Test specimen or

22、igin 16 9.2 Compressive strength 16 9.3 Strain at maximum compressive force. 17 9.4 Proportionality ratio or pseudo-elastic modulus, elastic modulus . 17 9.5 Buckling stress . 18 9.6 Rounding of results 18 9.7 Mean and standard deviation 18 10 Test report . 19 Annex A (informative) Illustration of e

23、lastic modulus 20 Annex B (normative) Alignment verification . 22 Annex C (normative) Compressive force limits to ensure true compressive failure 24 DIN EN ISO 20504:2016-10 EN ISO 20504:2016 (E) 2Foreword. 4 European foreword The text of ISO 20504:2006 has been prepared by Technical Committee ISO/T

24、C 206 “Fine ceramics” of the International Organization for Standardization (ISO) and has been taken over as EN ISO 20504:2016 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 stand

25、ard, 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.

26、 CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 658-2:2002. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: A

27、ustria, 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, Sw

28、eden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 20504:2006 has been approved by CEN as EN ISO 20504:2016 without any modification. DIN EN ISO 20504:2016-10 EN ISO 20504:2016 (E) 3 Foreword ISO (the International Organization for Standardization) is a worldwide fe

29、deration 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 com

30、mittee. 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. International Standards are drafted in accord

31、ance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard require

32、s approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 20504 was prepared by Technical

33、Committee ISO/TC 206, Fine ceramics. DIN EN ISO 20504:2016-10 EN ISO 20504:2016 (E) 4 1 Scope This International Standard describes procedures for determination of the compressive behaviour of ceramic matrix composite materials with continuous fibre reinforcement at room temperature. This method app

34、lies to all ceramic matrix composites with a continuous fibre reinforcement, uni-directional (1D), bi-directional (2D) and tri-directional (xD, with 2 x u 3), tested along one principal axis of reinforcement. This method may also be applied to carbon-fibre-reinforced carbon matrix composites (also k

35、nown as: carbon/carbon or C/C). Two cases of testing are distinguished: compression between platens and compression using grips. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For

36、 undated references, the latest edition of the referenced document (including any amendments) applies. 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 3611, Mic

37、rometer callipers for external measurements ISO 9513, Metallic materials Calibration of extensometers used in uniaxial testing ISO 14126, Fibre-reinforced plastic composites Determination of compressive properties in the in-plane direction ASTM E1012, Standard Practice for Verification of Test Frame

38、 and Specimen Alignment Under Tensile and Compressive Axial Force Application 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 gauge section part of the test specimen which has uniform and minimum cross-sectional area 3.2 gauge section length

39、l length of the gauge section DIN EN ISO 20504:2016-10 EN ISO 20504:2016 (E) 5 3.3 initial gauge length Loinitial distance between reference points on the test specimen in the gauge section before initiation of the test 3.4 final gauge length Lffinal distance between reference points on the test spe

40、cimen in the gauge section at the completion of the test 3.5 initial cross-sectional area Aoinitial area of the gauge sections cross-section 3.6 longitudinal deformation L change (contraction) of the initial gauge due to the application of a uniaxial compressive force NOTE The longitudinal deformati

41、on corresponding to the maximum force should be denoted as Lc,m. 3.7 compressive strain relative change in the gauge length defined as the ratio L/LoNOTE The compressive strain corresponding to the maximum force is denoted as c,m. 3.8 compressive force Fcuniaxial compressive force applied to a test

42、specimen 3.9 maximum compressive force Fc,mgreatest uniaxial compressive force applied to a test specimen when tested to failure 3.10 compressive stress compressive force supported by the test specimen at any time in the test divided by the initial cross-sectional area such that = Fc/Ao3.11 compress

43、ive strength Sc,mgreatest compressive stress applied to a test specimen when tested to failure 3.12 proportionality ratio or pseudo-elastic modulus Epslope of the linear region of the stress-strain curve, if any DIN EN ISO 20504:2016-10 EN ISO 20504:2016 (E) 6 NOTE Examination of the stress-strain c

44、urves for ceramic matrix composites allows definition of the following cases: Material with a linear region in the stress-strain curve. For ceramic matrix composites that have a mechanical behaviour characterised by a linear region, the proportionality ratio Epis defined as: ()21p1221,E =(1) where (

45、1, 1) and (2, 2) lie near the lower and the upper limits of the linear region of the stress-strain curve (see Figures A.1 and A.2). Material with non-linear region in the stress-strain curve. In this case only, stress-strain couples can be determined at specified stresses or specified strains. 3.13

46、elastic modulus E proportionality ratio or pseudo-elastic modulus, in the special case where the linearity starts near the origin See Figure A.2. 3.14 axial strain average of the longitudinal strain measured at the surface of the test specimen at specified locations See Annex B. 3.15 bending strain

47、difference between the longitudinal strain at a given longitudinal location on the test specimen surface and the axial strain at the same location See Annex B. 3.16 buckling force critical axially applied force at which an initially straight column assumes a curved shape 3.17 critical buckling stres

48、s critical axial compressive stress at which an initially straight column assumes a curved shape 4 Principle A test specimen of specified dimensions is loaded in compression. The compression test is usually performed at a constant cross-head displacement rate or at a constant deformation rate. NOTE Constant force rate is only allowed in the case of linear stress-strain behaviour up to failure. F