BS ISO 19630-2017 Fine ceramics (advanced ceramics advanced technical ceramics) Methods of test for reinforcements Determination of tensile properties of filaments at ambient tempe.pdf

1、BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06Fine ceramics (advanced ceramics, advanced technical ceramics) Methods of test for reinforcements Determination of tensile properties of filaments at ambient temperatureBS ISO 19630:2017 ISO 2017Fine ceramics (advanced

2、ceramics, advanced technical ceramics) Methods of test for reinforcements Determination of tensile properties of filaments at ambient temperatureCramiques techniques Mthodes dessai pour renforts Dtermination des proprits en traction du filament temprature ambianteINTERNATIONAL STANDARDISO19630First

3、edition2017-07Reference numberISO 19630:2017(E)National forewordThis British Standard is the UK implementation of ISO 19630:2017.The UK participation in its preparation was entrusted to Technical Committee RPI/13, Advanced technical ceramics.A list of organizations represented on this committee can

4、be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2017 Published by BSI Standards Limited 2017ISBN 978 0 580 86687 6ICS 81.060.30Complia

5、nce with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 July 2017.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS ISO 19630:2017 ISO 2017F

6、ine ceramics (advanced ceramics, advanced technical ceramics) Methods of test for reinforcements Determination of tensile properties of filaments at ambient temperatureCramiques techniques Mthodes dessai pour renforts Dtermination des proprits en traction du filament temprature ambianteINTERNATIONAL

7、 STANDARDISO19630First edition2017-07Reference numberISO 19630:2017(E)BS ISO 19630:2017ISO 19630:2017(E)ii ISO 2017 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2017, Published in SwitzerlandAll rights reserved. Unless otherwise specified, no part of this publication may be reproduced or util

8、ized 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 ISOs member body in the country of the requester.ISO copyrigh

9、t officeCh. de Blandonnet 8 CP 401CH-1214 Vernier, Geneva, SwitzerlandTel. +41 22 749 01 11Fax +41 22 749 09 47copyrightiso.orgwww.iso.orgBS ISO 19630:2017ISO 19630:2017(E)Foreword iv1 Scope . 12 Normative references 13 Terms, definitions and symbols 14 Principle 35 Apparatus . 36 Test specimens 37

10、Test specimen preparation 38 Number of test specimens 59 Test procedure 59.1 Displacement rate 59.2 Determination of the gauge length 59.3 Determination of the initial cross-section area 59.4 Testing technique 59.4.1 General 59.4.2 Load cell. 59.4.3 Test specimen mounting . 59.4.4 Measurements 69.4.

11、5 Test validity 610 Calculation of results . 610.1 Tensile strength 610.1.1 Determination of maximum tensile force 610.1.2 Calculation of tensile strength . 610.2 Calculation of the load train compliance, Cl610.3 Strain . 710.4 Young modulus 810.5 Fracture strain . 811 Test report . 9Bibliography .1

12、0 ISO 2017 All rights reserved iiiContents PageBS ISO 19630:2017ISO 19630:2017(E)ForewordISO (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

13、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

14、 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 crite

15、ria 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 elements of this document may be the subject

16、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 received (see www .iso .org/ patents).Any trade

17、name used in this document is information given for the convenience of users and does not constitute an endorsement.For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence

18、 to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL: www .iso .org/ iso/ foreword .html.This document was prepared by Technical Committee ISO/TC 206, Fine ceramics.iv ISO 2017 All rights reservedBS ISO 19630:2017INTERNATIONAL STANDARD ISO

19、19630:2017(E)Fine ceramics (advanced ceramics, advanced technical ceramics) Methods of test for reinforcements Determination of tensile properties of filaments at ambient temperature1 ScopeThis document specifies the conditions for the determination of tensile properties of single filaments of ceram

20、ic fibre such as tensile strength, Young modulus and fracture strain. The method applies to continuous ceramic filaments taken from tows, yarns, braids and knittings, which have strain to fracture less than or equal to 5 %.The method does not apply to carbon fibres that exhibit nonlinear stress-stra

21、in curve. The method does not apply to checking the homogeneity of strength properties of fibres, nor to assessing the effects of volume under stress. Statistical aspects of filament failure are not included.2 Normative referencesThe following documents are referred to in the text in such a way that

22、 some or all of their content constitutes requirements 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.ISO 7500-1, Metallic materials Calibration and verification of stati

23、c uniaxial testing machines Part 1: Tension/compression testing machines Calibration and verification of the force-measuring systemISO 19634, Fine ceramics (advanced ceramics, advanced technical ceramics) Ceramic composites Notations and symbolsISO 20501, Fine ceramics (advanced ceramics, advanced t

24、echnical ceramics) Weibull statistics for strength dataEN 1007-1, Advanced technical ceramics Ceramic composites Methods of test for reinforcements Part 1: Determination of size contentEN 1007-3, Advanced technical ceramics Ceramic composites Methods of test for reinforcements Part 3: Determination

25、of filament diameter and cross-section area3 Terms, definitions and symbolsFor the purposes of this document, the terms, definitions and symbols given in ISO 19634 and the following apply.ISO and IEC maintain terminological databases for use in standardization at the following addresses: IEC Electro

26、pedia: available at h t t p :/ www .electropedia .org/ ISO Online browsing platform: available at h t t p :/ www .iso .org/ obp3.1gauge lengthL0initial distance between two reference points on the filament ISO 2017 All rights reserved 1BS ISO 19630:2017ISO 19630:2017(E)3.2test specimen lengthLfiniti

27、al distance between the gripped ends of the filament3.3initial cross-section areaA0initial area of the cross section of the filament within the gauge length (3.1)3.4maximum tensile forceFmhighest recorded tensile force on the test specimen when tested to failure3.5tensile stresstensile force support

28、ed by the test specimen divided by the initial cross-section area (3.3)3.6tensile strengthmratio of the maximum tensile force to the initial cross-section area (3.3)3.7longitudinal deformationLincrease of the gauge length (3.1) during the tensile test3.8total complianceCtinverse of the slope in the

29、linear part of the tensile force-displacement curve3.9load train complianceClratio of the cross-head displacement excluding any test specimen contribution to the corresponding force during the tensile test3.10strainratio of the longitudinal deformation (3.7) to the gauge length (3.1)3.11fracture str

30、ainmstrain at failure of the test specimen3.12Young modulusEslope of the linear part of the tensile stress-strain curve3.13elementary unitsmallest commercially available unit of a given productNote 1 to entry: For fibre, this is usually a spool.2 ISO 2017 All rights reservedBS ISO 19630:2017ISO 1963

31、0:2017(E)4 PrincipleA ceramic filament is loaded in tension. The test is performed at constant displacement rate up to failure. Force and cross-head displacement are measured and recorded simultaneously. When required, the longitudinal deformation is derived from the cross-head displacement using a

32、compliance correction.5 Apparatus5.1 Test machine, which shall be equipped with a system for measuring the force applied to the test specimen which shall conform to grade 1 according to ISO 7500-1. Additionally, the machine shall be equipped with a system for measuring the cross-head displacement wi

33、th accuracy better than 1 m.5.2 Load train, in which the grips shall align the test specimen with the direction of the force. Slippage of the filament in the grips shall be prevented.5.3 Adhesive, such as epoxy resin or sealing wax, for fixing the filament ends to the grip.5.4 Data recording system,

34、 which, when calibrated, may be used to record force-displacement curves. The use of a digital data recording system is recommended.6 Test specimensSpecimens with a gauge length of 25 mm shall be used to establish the force-displacement curves.Specimens with a gauge length of 10 mm and 50 mm shall b

35、e used to determine the load train compliance, Cl.The tolerance on the gauge length is 1 mm.7 Test specimen preparationExtreme care shall be taken during test specimen preparation to ensure that the procedure is repeatable from test specimen to test specimen and to avoid handling damage.NOTE 1 The i

36、ntroduction of damage during test specimen preparation may result in the weakening of the filament.During test specimen preparation, and in particular when extracting a filament from the tow, the ratio of the amount of damaged filaments to the total number of extracted filaments should be minimized.

37、NOTE 2 An example of a device to prevent damage during test specimen manipulation and mounting is shown in Figure 1. This test specimen preparation uses a window tab of thin paper, metal or plastic cut. The length of the window is equal to the gauge length of the filament test specimen. A suitable a

38、dhesive, such as epoxy resin, cement or sealing wax, is used for affixing the filament to the ends of the mounting tab.NOTE 3 Another device that can be used to prevent damage during test specimen manipulation and mounting is shown in Figure 2. ISO 2017 All rights reserved 3BS ISO 19630:2017ISO 1963

39、0:2017(E)Dimensions in millimetresKey1 filament2 glueL1L210 0,5 30 1 25 0,5 45 1 50 0,5 70 1 Figure 1 Assembly of a test specimenKey1 alumina tubes 4 ceramic cement2 temporary screw attachment 5 alumina rod3 test specimen Figure 2 Alternative assembly of a test specimen4 ISO 2017 All rights reserved

40、BS ISO 19630:2017ISO 19630:2017(E)8 Number of test specimensPrepare at least 20 test specimens from each elementary unit to enable 20 measurements to be made.Removal of any size present makes it easier to prepare good specimens. The size shall be removed in accordance with EN 1007-1.For the determin

41、ation of strain-related properties, three additional tests at each gauge length of 10 mm and 50 mm are required in order to establish load train compliance, Cl.If a statistical evaluation is required, the number of test specimens at a gauge length of 25 mm shall be in accordance with ISO 20501.NOTE

42、Compliance determination is not required if only strength needs to be determined.9 Test procedure9.1 Displacement rateA displacement rate that allows specimen rupture within 1 min shall be used.The displacement rate and the loading mode shall be reported.9.2 Determination of the gauge lengthThe gaug

43、e length is measured to an accuracy of 0,1 mm.9.3 Determination of the initial cross-section areaThe initial cross-section area is measured in accordance with EN 1007-3.NOTE In principle, the initial cross-section area is to be determined on the filament to be tested. In practice, this can be achiev

44、ed by sampling the lengths to be tested from a single filament at intermittent locations and using the parts in between for cross-section measurement. This assumes that for the lengths of filament to be tested, the cross section does not vary significantly with the length.An alternative method consi

45、sts of measuring the filament cross section after fracture from a transverse cross section taken from the part of the grips still containing embedded filament. In this case, care has to be taken not to damage the filament during preparation and handling.9.4 Testing technique9.4.1 GeneralPerform the

46、following steps in a sequential order.9.4.2 Load cellZero the load cell.9.4.3 Test specimen mountingMount the specimen in the load train with its longitudinal axis coinciding with that of the test machine. Care shall be taken not to induce torsional loads or surface damage to the filament. Before ap

47、plying the load, i.e. with the mounting unstrained, cut or burn through both sides of the window tab at mid-gauge. If burning is used, care shall be taken to avoid exposing the specimen to the flame. As the filament is very fragile, the test specimen breaks occasionally during this step. ISO 2017 Al

48、l rights reserved 5BS ISO 19630:2017ISO 19630:2017(E)9.4.4 Measurements Set the cross-head speed. Record the force versus cross-head displacement curve up to failure.9.4.5 Test validityThe following circumstances invalidate a test: failure to specify and record test conditions; any slippage in the l

49、oad train as evidenced by a drop in the force/displacement curve, before reaching the maximum tensile force; fracture strain exceeding 5 %.Failure exactly at the mounting tabs invalidates only the determination of the strength and strain to failure.10 Calculation of results10.1 Tensile strength10.1.1 Determination of maximum tensile forceThe maximum tensile force on the test specimen, Fm, is obtained from the maximum force value taken from the force versus