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1、BRITISH STANDARD BS EN 658-5:2002 Advanced technical ceramics Mechanical properties of ceramic composites at room temperature Part 5: Determination of interlaminar shear strength by short span bend test (three points) The European Standard EN 658-5:2002 has the status of a British Standard ICS 81.06
2、0.30 ? Copyright British Standards Institution Reproduced by IHS under license with BSI - Uncontrolled Copy Document provided by IHS Licensee=Bureau Veritas/5959906001, 11/08/2004 05:15:21 MST Questions or comments about this message: please call the Document Policy Group at 303-397-2295. -,-,- BS E
3、N 658-5:2002 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 28 February 2003 BSI 28 February 2003 ISBN 0 580 41348 9 National foreword This British Standard is the official English language version of EN 658-5:2002. It supersedes DD ENV 658-
4、5:1993 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee RPI/13, Advanced technical ceramics, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The Britis
5、h Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Onlin
6、e. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsibl
7、e international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, t
8、he EN title page, pages 2 to 9 and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments Copyright British Standards Institution Reproduced by IHS under license with BSI - Uncontrolled Co
9、py Document provided by IHS Licensee=Bureau Veritas/5959906001, 11/08/2004 05:15:21 MST Questions or comments about this message: please call the Document Policy Group at 303-397-2295. -,-,- EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 658-5 December 2002 ICS 81.060.30Supersedes ENV 658-5:19
10、93 English version Advanced technical ceramics - Mechanical properties of ceramic composites at room temperature - Part 5: Determination of interlaminar shear strength by short span bend test (three points) Cramiques techniques avances - Proprits mcaniques des cramiques composites temprature ambiant
11、e - Partie 5: Dtermination de la rsistance au cisaillement interlaminaire par essai de flexion sur appuis rapprochs (trois points) Hochleistungskeramik - Mechanische Eigenschaften von keramischen Verbundwerkstoffen bei Raumtemperatur - Teil 5: Bestimmung der Scherfestigkeit im Drei-Punkt- Biegeversu
12、ch mit kurzem Auflagerabstand This European Standard was approved by CEN on 16 October 2002. 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
13、 lists and bibliographical references concerning such national standards may be obtained on application to the 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 res
14、ponsibility of a CEN member into its own language and notified to the Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Mal
15、ta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2002 CENAll rights of exploitation in any form and by any mean
16、s reserved worldwide for CEN national Members. Ref. No. EN 658-5:2002 E Copyright British Standards Institution Reproduced by IHS under license with BSI - Uncontrolled Copy Document provided by IHS Licensee=Bureau Veritas/5959906001, 11/08/2004 05:15:21 MST Questions or comments about this message:
17、please call the Document Policy Group at 303-397-2295. -,-,- EN 658-5:2002 (E) 2 Contents page Foreword3 1Scope 4 2Normative references 4 3Principle4 4Terms, definitions and symbols.4 5Apparatus .5 5.1Test machine5 5.2Test jig.5 5.3Dimension measuring devices.6 6Test specimens6 7Test specimen prepar
18、ation.6 7.1Machining .6 7.2Number of test specimens6 8Procedure .6 8.1Displacement rate6 8.2Measurement of test specimens 6 8.3Testing technique 7 8.3.1Test specimen mounting.7 8.3.2Measurements7 8.4Test validity 7 9Calculation of results 7 10Test report 8 Copyright British Standards Institution Rep
19、roduced by IHS under license with BSI - Uncontrolled Copy Document provided by IHS Licensee=Bureau Veritas/5959906001, 11/08/2004 05:15:21 MST Questions or comments about this message: please call the Document Policy Group at 303-397-2295. -,-,- w w w . b z f x w . c o m EN 658-5:2002 (E) 3 Foreword
20、 This document (EN 658-5:2002) 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 given the status of a national standard, either by publication of an identical text or by endorsement, at the l
21、atest by June 2003, and conflicting national standards shall be withdrawn at the latest by June 2003. This document supersedes ENV 658-5:1993. EN 658 Advanced technical ceramics Mechanical properties of ceramic composites at room temperature has six parts: Part 1: Determination of tensile properties
22、 Part 2: Determination of compressive properties Part 3: Determination of flexural strength Part 4: Determination of interlaminar shear strength by compression loading of notched test specimens Part 5: Determination of interlaminar shear strength by short span bend test (three-points) Part 6: Determ
23、ination of interlaminar shear strength by double-punch shearing According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greec
24、e, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Copyright British Standards Institution Reproduced by IHS under license with BSI - Uncontrolled Copy Document provided by IHS Licensee=Bureau Veritas/5959906001, 11/08/200
25、4 05:15:21 MST Questions or comments about this message: please call the Document Policy Group at 303-397-2295. -,-,- w w w . b z f x w . c o m EN 658-5:2002 (E) 4 1 Scope This part of this European Standard specifies the conditions for determination of the interlaminar shear strength of ceramic mat
26、rix composite materials with continuous fibre reinforcement at room temperature, by subjecting a test specimen to a short-span bend test (three points). This method applies to all ceramic matrix composites with a continuous fibre reinforcement unidirectional (1D) and bidirectional (2D) and tridirect
27、ional (xD, with 2 x 3) as defined in ENV 13233. Two other methods for the determination of shear strength are given in further parts of EN 658. NOTE 1The interlaminar shear characteristics can vary significantly depending on test specimen preparation and dimensions, rate of application of the test f
28、orce, surface condition, etc NOTE 2However, results obtained by this part of EN 658 cannot be compared with results obtained by the two other methods. NOTE 3Care should be exercised in interpreting the results of the method to obtain absolute values of the interlaminar shear strength of ceramic matr
29、ix composites for design purposes. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text, and the publications are listed hereafter. For dated references
30、, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies (including amendments). ENV 13233:1998, Advanced technical cera
31、mics Ceramic composites Notations and symbols. EN ISO 7500-1:1999, Metallic materials - Verification of static uniaxial testing machines - Part 1: Tension/compression testing machines (ISO 7500-1:1999). ISO 3611, Micrometer callipers for external measurement. 3 Principle The test consists of measuri
32、ng the force required to fracture a test specimen subjected to a short-span, three point bend test. The geometry of loading in the direction normal to the plies (direction 3) and the test specimen dimensions shall be such that failure occurs in the form of interlaminar shear in plane (1,2). The test
33、 is performed at constant crosshead displacement rate. 4 Terms, definitions and symbols For the purposes of this European Standard, the following terms, definitions and symbols and those given in ENV 13233:1998 apply. 4.1 shear failure force, F the maximum force required to produce interlaminar shea
34、r failure when test specimen is subjected to three-points short span bend test Copyright British Standards Institution Reproduced by IHS under license with BSI - Uncontrolled Copy Document provided by IHS Licensee=Bureau Veritas/5959906001, 11/08/2004 05:15:21 MST Questions or comments about this me
35、ssage: please call the Document Policy Group at 303-397-2295. -,-,- w w w . b z f x w . c o m EN 658-5:2002 (E) 5 4.2 interlaminar shear strength, ILSSb ratio calculated on the basis of the shear failure force and the shear loaded area NOTEThe notation ILSS is supplemented by a small letter referrin
36、g to the test method described ; in this case ILSSb for the interlaminar shear strength obtained from a short span bend test. 5 Apparatus 5.1 Test machine The test machine shall be equipped with a system for recording the force applied to the test specimen. The machine shall conform to grade 1 in EN
37、 ISO 7500-1:1999. 5.2 Test jig The test jig is composed of two parts, linked to the fixed and mobile parts of the machine. It has two outer support rollers and one inner support roller. The cylindrical rollers shall have a diameter of 4 mm to 10 mm. Their length shall be at least equal to the width
38、of the test specimen. They shall be made of a material with a hardness at least equal to that of the test specimen. The axes of the rollers shall be parallel to within 0,01 mm/mm. The outer rollers shall be free to rotate (see Figure 1). Two rollers shall be free to pivot around an axis parallel to
39、the longitudinal direction of the test specimen, in order to adapt to the non-parallelism of the upper and lower faces of unmachined test specimens (see Figure 1). The distance between rollers shall be in accordance with clause 6. The inner roller shall be centred with respect to the outer rollers t
40、o within 0,2 mm. Key 1 Pivoting loading roller 2 Rolling and pivoting support roller 3 Rolling but non pivoting support roller Figure 1 Test jig Copyright British Standards Institution Reproduced by IHS under license with BSI - Uncontrolled Copy Document provided by IHS Licensee=Bureau Veritas/59599
41、06001, 11/08/2004 05:15:21 MST Questions or comments about this message: please call the Document Policy Group at 303-397-2295. -,-,- w w w . b z f x w . c o m EN 658-5:2002 (E) 6 5.3 Dimension measuring devices Devices used for measuring linear dimensions of the test specimen shall be accurate to 0
42、,1 mm. Micrometres shall be in accordance with ISO 3611. 6 Test specimens Recommended test specimen dimensions are given in Table 1. Table 1 Recommended test specimen dimensions Dimensions in millimetres 1D, 2D, xDTolerance lt , total length 20 to 25 1 h, thickness3 1 b, width10 0,1 S, support span1
43、5 0,1 Plane parallelism of machined parts0,05 NOTEThe support span of 15 mm is derived from the test specimen thickness of 3 mm given in Table 1. If a different thickness is used the span should be changed according to: S = 5 h 1 7 Test specimen preparation 7.1 Machining During cutting out, care sha
44、ll be taken to ensure that the test specimen axes coincide with the fibre directions. Machining parameters which avoid damage to the material shall be established and documented. These parameters shall be adhered to during test specimen preparation. 7.2 Number of test specimens At least five valid t
45、est results (see 8.4) are required. NOTEIf statistical evaluation is required, the number of test specimens should be in accordance with ENV 843-5. 8 Procedure 8.1 Displacement rate Use a constant cross head displacement rate which allows test specimen failure within 1 min. The displacement rate sha
46、ll be reported. NOTEGenerally, a displacement rate between 0,5 mm/min and 1 mm/min is used. 8.2 Measurement of test specimens Measure the width and thickness to the nearest 0,1 mm in the centre and at each end of the test specimen and report the arithmetic means of the measurements. Copyright Britis
47、h Standards Institution Reproduced by IHS under license with BSI - Uncontrolled Copy Document provided by IHS Licensee=Bureau Veritas/5959906001, 11/08/2004 05:15:21 MST Questions or comments about this message: please call the Document Policy Group at 303-397-2295. -,-,- w w w . b z f x w . c o m E
48、N 658-5:2002 (E) 7 8.3 Testing technique 8.3.1 Test specimen mounting The test specimen shall be installed in the test jig centred with respect to the rollers and with its longitudinal axis perpendicular to the axes of the rollers. NOTEIt is recommended to use a tool for this purpose. Zero the load cell output. When required, a small preload can be applied in order to maintain correct positioning of