DIN EN 1007-5-2010 en 3769 Advanced technical ceramics - Ceramic composites - Methods of test for reinforcements - Part 5 Determination of distribution of tensile strength and of t.pdf

1、June 2010 Translation by DIN-Sprachendienst.English price group 11No 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 8

2、1.060.30!$i-d“1701065www.din.deDDIN EN 1007-5Advanced technical ceramics Ceramic composites - Methods of test for reinforcements Part 5: Determination of distribution of tensile strength and of tensilestrain to failure of filaments within a multifilament tow at ambienttemperatureEnglish translation

3、of DIN EN 1007-5:2010-06Hochleistungskeramik Keramische Verbundwerkstoffe - Verfahren zur Prfung der Faserverstrkungen Teil 5: Bestimmung der Verteilung von Zugfestigkeit und Zugdehnung von Fasern imFaserbndel bei RaumtemperaturEnglische bersetzung von DIN EN 1007-5:2010-06Cramiques techniques avanc

4、es Cramiques composites - Mthodes dessai pour les renforts Partie 5: Dtermination de la distribution de la rsistance en traction et de la dformationde traction la rupture des filaments dans un fil temprature ambianteTraduction anglaise de DIN EN 1007-5:2010-06SupersedesDIN EN 1007-5:2003-10www.beuth

5、.deDocument comprises pagesIn case of doubt, the German-language original shall be considered authoritative.2006.10 DIN EN 1007-5:2010-06 A comma is used as the decimal marker. National foreword This standard has been prepared by Technical Committee CEN/TC 184 “Advanced technical ceramics” (Secretar

6、iat: BSI, United Kingdom). The responsible German body involved in its preparation was the Normenausschuss Materialprfung (Materials Testing Standards Committee), Working Committee NA 062-02-94 AA Prfung von Hochleistungskeramik Keramische Verbundwerkstoffe. EN 1007 consists of the following parts,

7、under the general title Advanced technical ceramics Ceramic composites Methods of test for reinforcements: Part 1: Determination of size content Part 2: Determination of linear density Part 3: Determination of filament diameter and cross-section area Part 4: Determination of tensile properties of fi

8、laments at ambient temperature Part 5: Determination of distribution of tensile strength and of tensile strain to failure of filaments within a multifilament tow at ambient temperature Part 6: Determination of tensile properties of filaments at high temperature Part 7: Determination of the distribut

9、ion of tensile strength and of tensile strain to failure of filaments within a multifilament tow at high temperature The International and European Standards referred to in clause 2 and in the bibliography of this standard have been published as the corresponding DIN EN Standards. The CEN Technical

10、Report referred to in clause 2 corresponds as follows: CEN/TR 13233 DIN-Fachbericht CEN/TR 13233 Amendments This standard differs from DIN EN 1007-5:2003-10 as follows: a) The text in clause 1 “Scope” has been reformulated. b) The former clause 5 has been replaced with clause 3 “Terms and definition

11、s” and extended. Previous editions DIN V ENV 1007-5: 1998-12 DIN EN 1007-5: 2003-10 National Annex NA (informative) Bibliography DIN-Fachbericht CEN/TR 13233, Advanced technical ceramics Notations and symbols 2 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 1007-5 March 2010 ICS 81.060.30 Supe

12、rsedes EN 1007-5:2003English Version Advanced technical ceramics - Ceramic composites - Methods of test for reinforcements - Part 5: Determination of distribution of tensile strength and of tensile strain to failure of filaments within a multifilament tow at ambient temperature Cramiques techniques

13、avances - Cramiques composites - Mthodes dessais pour les renforts - Partie 5: Dtermination de la distribution de la rsistance en traction et de la dformation de traction la rupture des filaments dans un fil temprature ambiante Hochleistungskeramik - Keramische Verbundwerkstoffe - Verfahren zur Prfu

14、ng der Faserverstrkungen - Teil 5: Bestimmung der Verteilung von Zugfestigkeit und Zugdehnung von Fasern im Faserbndel bei Raumtemperatur This European Standard was approved by CEN on 13 February 2010. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the cond

15、itions 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 Management Centre or to any CEN member. This European Standard exists in thr

16、ee 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 Management Centre has the same status as the official versions. CEN members are the national standards bodies of

17、Austria, Belgium, Bulgaria, Croatia, 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.

18、EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2010 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1007-5:2010: EEN 1007-5:

19、2010 (E) 2 Contents page Foreword 31 Scope 42 Normative references 43 Terms and definitions . 44 Principle . 65 Significance and use . 66 Apparatus . 66.1 Tensile testing equipment 66.2 Load train . 66.3 Data recording . 77 Test specimens 77.1 General . 77.2 Window type specimen . 77.3 Cylindrical e

20、nd type specimen . 88 Test specimen preparation . 88.1 General . 88.2 Window type specimen . 88.3 Cylindrical end type specimen . 98.4 Number of test specimens . 98.5 Determination of the initial cross sectional area . 98.6 Determination of the gauge length 109 Testing technique 109.1 Test specimen

21、mounting 109.2 Selection of strain rate 109.3 Measurement . 119.4 Determination of load train compliance 119.5 Test validity 1110 Calculation of results 1110.1 Calculation of the parasitic load train compliances 1110.2 Determination of true origin . 1210.3 Construction of envelope curve and determin

22、ation of instantaneous compliance Ct,j1210.4 Probability of filament rupture . 1310.5 Distribution of filament strain 1310.5.1 Calculation of filament strain . 1310.5.2 Distribution of filament strain 1310.6 Distribution of filament strength 1410.6.1 Initial cross sectional area . 1410.6.2 Elastic m

23、odulus (Youngs modulus) of the tow . 1410.6.3 Calculation of filament strength and filament strength distribution 1510.7 Average filament rupture strain and average filament rupture strength . 1510.8 Overall average filament rupture strain and overall average filament rupture strength . 1510.9 Calcu

24、lation of tow strength 1611 Test report 16Bibliography 18DIN EN 1007-5:2010-06 EN 1007-5:2010 (E) 3 Foreword This document (EN 1007-5:2010) 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 give

25、n the status of a national standard, either by publication of an identical text or by endorsement, at the latest by September 2010, and conflicting national standards shall be withdrawn at the latest by September 2010. Attention is drawn to the possibility that some of the elements of this document

26、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 EN 1007-5:2003. EN 1007 Advanced technical ceramics Ceramic composites Methods of test for reinforcements has 7 parts: Part 1: Determination o

27、f size content Part 2: Determination of linear density Part 3: Determination of filament diameter and cross-section area Part 4: Determination of tensile properties of filaments at ambient temperature Part 5: Determination of distribution of tensile strength and of tensile strain to failure of filam

28、ents within a multifilament tow at ambient temperature Part 6: Determination of tensile properties of filaments at high temperature Part 7: Determination of the distribution of tensile strength and of tensile strain to failure of filaments within a multifilament tow at high temperature According to

29、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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latv

30、ia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. DIN EN 1007-5:2010-06 EN 1007-5:2010 (E) 4 1 Scope This European Standard specifies the conditions, apparatus and procedure for determining the dis

31、tribution of tensile strength and tensile strain to failure of ceramic filaments in multifilament tows at ambient temperature. This European Standard applies to tows of continuous ceramic filaments, which are assumed to act freely and independently under loading, and behave linearly elastic up to fa

32、ilure. 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. EN 1007-2, Advanced

33、 technical ceramics Ceramic composites Methods of test for reinforcement Part 2: Determination of linear density CEN/TR 13233:2007, Advanced technical ceramics Notations and symbols ISO 10119, Carbon fibre Determination of density 3 Terms and definitions For the purposes of this document, the terms

34、and definitions given in CEN/TR 13233:2007 and the following apply. 3.1 gauge length L0initial distance between two reference points on the tow NOTE Usually the gauge length is taken as the distance between the gripped ends of the tow. 3.2 initial cross sectional area A0sum of the cross sectional ar

35、eas of all the filaments in the tow 3.3 tow elongation L increase of the gauge length between the two reference points on the tow 3.4 tow strain ratio of the tow elongation L to the gauge length Lo3.5 tow maximum tensile force Ftow highest recorded tensile force on the test specimen when tested to f

36、ailure DIN EN 1007-5:2010-06 EN 1007-5:2010 (E) 5 3.6 tow strength towratio of the tow maximum tensile force to the cross sectional area of all unbroken filaments at maximum tensile force, Ftow3.7 force at step j Fjforce applied on the test specimen at step j 3.8 filament strain jstrain at step j in

37、 the non-linear parts of the force-displacement graph 3.9 filament stress jratio of the tensile force to the cross sectional area of all unbroken filaments at step j in the non-linear parts of the force-displacement curve 3.10 average filament rupture strain rstatistical average rupture strain of th

38、e filaments in the tow for each test determined from the Weibull strain distribution parameters of the filaments 3.11 overall average filament rupture strain rarithmetic mean of the average filament rupture strains 3.12 average filament strength rstatistical average strength of the filaments in the

39、tow for each test determined from the Weibull strength distribution parameters of the filaments 3.13 overall average filament strength rarithmetic mean of the average filament strengths 3.14 compliances 3.14.1 initial total compliance Ctinverse slope of the linear part of the force-displacement curv

40、e 3.14.2 instantaneous total compliance Ct,jinverse slope of the secant at any point j in the non-linear part of the force-displacement curve DIN EN 1007-5:2010-06 EN 1007-5:2010 (E) 6 NOTE The slope is taken from a line through any point of the force-displacement curve and the intersection point of

41、 the line of the initial total compliance with the abscissa (true origin). 3.14.3 load train compliance Clratio of the cross head displacement to the force, excluding any contribution of the test specimen to the displacement during the tensile test 3.14.4 compliance of the tow Ctowinstantaneous tota

42、l compliance of the tow at maximum tensile force 4 Principle A multifilament tow is loaded in tension. The test is performed at a constant displacement rate up to failure of all fibres. Force and cross-head displacement are measured and recorded simultaneously. When required, the longitudinal deform

43、ation is derived from the cross-head displacement using a compliance correction. From the force-displacement curve, the two-parameter Weibull distribution of the rupture strain and the distribution of the rupture strength of the filaments are obtained by sampling the non-linear parts of the curve at

44、 discrete intervals j, which correspond to an increasing number of failed filaments in the tow. The test duration is limited to reduce time dependent effects. 5 Significance and use The measurement of strain directly on the tow is difficult, so it is usually achieved indirectly via a compliance meas

45、urement that includes contributions of the loading train, grips, tab materials, etc. When it is possible to measure the tow elongation directly (by using a suitable extensometer system) this correction is not needed. The calculation of the results in Clause 10 also applies in this case by setting th

46、e load train compliance equal to zero. The evaluation method is based on an analysis of the non-linear increasing and decreasing parts of the force-displacement curve, which are caused by progressive filament failure during the test. The occurrence of these stages is promoted by a higher stiffness o

47、f the loading and gripping system. This method of evaluation is only applicable when the force-displacement curve shows these non-linear parts. The distribution of filament rupture strains does not depend on the number of filaments in the tow and is hence not affected by the number of filaments that

48、 are broken before the test. The determination of the filament strength distribution and of the elastic modulus necessitates knowledge of the initial cross sectional area of the tow. Because the number of unbroken filaments within the tow prior to the test is usually unknown, the values for the fila

49、ment strength and for the elastic modulus necessarily represent lower bounds to these quantities. Also, the variation in filament diameter, which affects the strength values, is not accounted for. 6 Apparatus 6.1 Tensile testing equipment The test machine shall be equipped with a system for measuring the force ap