BS EN 3783-2013 Aerospace series Fibre composite materials Normalisation of fibre dominated mechanical properties《航空航天系列 纤维复合材料 受机械性能控制的纤维的正常化》.pdf

1、BSI Standards PublicationBS EN 3783:2013Aerospace series Fibrecomposite materials Normalisation of fibredominated mechanicalpropertiesBS EN 3783:2013 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 3783:2013. The UK participation in its preparation was entrusted

2、 to TechnicalCommittee ACE/65, Non-metallic materials for aerospace purposes.A list of organizations represented on this committee can 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 correc

3、t application. The British Standards Institution 2013.Published by BSI Standards Limited 2013ISBN 978 0 580 82943 7 ICS 49.025.40 Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strat

4、egy Committee on 31 August 2013.Amendments/corrigenda issued since publicationDate Text affectedBS EN 3783:2013EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 3783 August 2013 ICS 49.025.40 English Version Aerospace series - Fibre composite materials - Normalisation of fibre dominated mechanica

5、l properties Srie arospatiale - Matriaux composites base de fibres - Standardisation des caractristiques mcaniques lies aux fibres Luft- und Raumfahrt - Faserverbundwerkstoffe - Normierung von faserabhngigen mechanischen Eigenschaften This European Standard was approved by CEN on 8 May 2013. CEN mem

6、bers 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 bibliographical references concerning such national standards may be obtained on applicat

7、ion 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 responsibility of a CEN member into its own language and notified to the CEN-CENELEC Manage

8、ment 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 Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,

9、 Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 B

10、russels 2013 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 3783:2013: EBS EN 3783:2013EN 3783:2013 (E) 2 Contents Page Foreword 3 1 Scope and field of application 4 2 Normative references 4 3 Principle 4 4 Designation 4 5 Procedu

11、re .5 6 Test report 6 BS EN 3783:2013EN 3783:2013 (E) 3 Foreword This document (EN 3783:2013) has been prepared by the Aerospace and Defence Industries Association of Europe - Standardization (ASD-STAN). After enquiries and votes carried out in accordance with the rules of this Association, this Sta

12、ndard has received the approval of the National Associations and the Official Services of the member countries of ASD, prior to its presentation to CEN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the lates

13、t by February 2014, and conflicting national standards shall be withdrawn at the latest by February 2014. 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

14、such patent rights. 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, Former Yugoslav Republic of Ma

15、cedonia, 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. BS EN 3783:2013EN 3783:2013 (E) 4 1 Scope and field of application

16、This standard describes the procedure for normalisation of fibre dominated mechanical properties. The procedure is valid for carbon, glass and aramid reinforced laminates. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispe

17、nsable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 2329, Aerospace series Textile glass fibre preimpregnates Test method for the determination of mass per unit

18、area EN 2557, Aerospace series Carbon fibre preimpregnates Determination of mass per unit area EN 2564, Aerospace series Carbon fibre laminates Determination of the fibre-, resin- and void contents 3 Principle When presenting mechanical data in which the characteristic is mostly dependent upon the f

19、ibre, it is usual to adjust the result to a specific fibre volume. The method consists of the measurement or calculation of the fibre content by volume of the test laminates or specimens. This fibre content is then used to adjust the results of mechanical tests which depend, in a linear relationship

20、, upon the fibre volume content. The results are corrected to a predefined nominal content using the rule of mixtures. 4 Designation EXAMPLE Description block Normalisation of properties Identity block EN3783B Number of this standard Method (see 5) BS EN 3783:2013EN 3783:2013 (E) 5 5 Procedure 5.1 F

21、ibre volume content (Vf) determination 5.1.1 Method A (carbon fibre composite only) The fibre content (Vf) in % on the test laminate is measured by digestion of representative specimens cut from the same laminate as that used for the mechanical tests to be adjusted. The method to be used is that def

22、ined in EN 2564. The average fibre volume obtained for the laminate is the result to be used for correction (see 5.2). 5.1.2 Method B and C Measure the thickness (t1) in mm of the test laminate as an average of 10 uniformly spaced readings using a 6 mm to 8 mm diameter flat faced micrometer. If this

23、 thickness is divided by the number of plies used for the laminate, the measured cure ply thickness in mm is obtained (tp). 5.1.2.1 Method B Using the product declared nominal cured ply thickness (tn) as defined in the material specification, the fibre volume (Vf) in % for the laminate is calculated

24、 using the equation: npnfVttV = (1) Where Vnin % is the nominal fibre volume as defined in the material specification and upon which the nominal cured ply thickness is based. 5.1.2.2 Method C Because of accepted tolerances in prepreg fibre mass per unit area, a certain inaccuracy in fibre volume est

25、imation will result when using method B above. This variable can be eliminated by using true fibre weight measured on the prepreg sample before laminating. Measure the fibre mass per unit area (Mf) in g/m2of a suitably representative sample of prepreg according to EN 2329 or EN 2557 (as appropriate)

26、. The theoretical cured ply thickness (t2) in mm can now be calculated by the equation: 1ff210=nVpMt (2) Where Vnis as defined in 5.1.2.1 above and pfis the average fibre density (in g/cm3) of the batch (or batches) used fprthe material in question. The laminate fibre volume content is calculated by

27、 the equation: np2fVttV = (3) or pf1ff10tpMV=(4) BS EN 3783:2013EN 3783:2013 (E) 6 NOTE Methods B and C require that no fibres be displaced in the laminating process owing to lateral movement of fibres during consolidation. 5.2 Correction of results The characteristics which are to be corrected to a

28、 nominal fibre content shall be defined in the material specification. These characteristics shall be those which are dominated by the reinforcement (such as tensile, flexural or compression strength and modulus). Unless stated in the technical specification, the proportion of fibres (which dominate

29、s the property) shall be greater than 20 % in the test direction. Where specified, each result is to be corrected by multiplying the value by the factor k: fnVVk = (6) Where Vnin % is the nominal fibre volume as defined in the material specification. This correction is only valid for fibre volumes c

30、lose to the nominal, that is to say, according to the following requirement: 2,0nnfVVV(7) Unless otherwise stated in the material specification, the value of Vfobtained by method B is to be used. 6 Test report The test report shall contain the information required by the appropriate test method. In

31、addition, the following information shall also be included. 6.1 Individual and mean corrected results. 6.2 The method used (A, B or C). 6.3 The laminate fibre volume (Vf). 6.4 The nominal fibre volume (Vn) to which the results have been normalised. This page deliberately left blankBSI is the nationa

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