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1、BRITISH STANDARD AEROSPACE SERIES BS EN 2560: 1998 Carbon fibre preimpregnates Determination of the resin flow The European Standard EN 2560:1998 has the status of a British Standard ICS 49.025.40 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 01:29:37 GMT+00:00 2006, Uncontrolled Copy, (c)
2、BSI BS EN 2560:1998 This British Standard, having been prepared under the direction of the Engineering Sector Board, was published under the authority of the Standards Board and comes into effect on 15 October 1998 BSI 05-1999 ISBN 0 580 30393 4 National foreword This British Standard is the English
3、 language version of EN 2560:1998. The UK participation in its preparation was entrusted to Technical Committee ACE/64, Aerospace structural reinforced plastics, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enq
4、uiries 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. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The Br
5、itish Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A Brit
6、ish Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a fron
7、t cover, an inside front cover, pages i and ii, the EN title page, pages 2 to 7 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication
8、 Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 01:29:37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 2560:1998 BSI 05-1999i Contents Page National forewordInside front cover Foreword2 Text of EN 25603 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 01:29:37 G
9、MT+00:00 2006, Uncontrolled Copy, (c) BSI ii blank Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 01:29:37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 2560 July 1998 ICS 49.025.60 Descriptors: Aircraft industry, preimpregnated products, car
10、bon fibres, tests, determination, flow, resins, test specimen, procedure English version Aerospace series Carbon fibre preimpregnates Determination of the resin flow Srie arospatiale Primprgns de fibres de carbone Dtermination de lcoulement de rsine Luft- und Raumfahrt Kohlenstoffaser-Prepregs Besti
11、mmung des Harzflusses This European Standard was approved by CEN on 15 May 1998. 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 lists and b
12、ibliographical references concerning such national standards may be obtained on application to the Central Secretariat 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 responsibilit
13、y of a CEN member into its own language and notified to the Central Secretariat 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, Netherlands
14、, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1998 CEN All rights of exploitation in any form and by any means reserv
15、ed worldwide for CEN national Members. Ref. No. EN 2560:1998 E Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 01:29:37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 2560:1998 BSI 05-1999 2 Foreword This European Standard has been prepared by the European Association of Aerospace Manufacturer
16、s (AECMA). After inquiries and votes carried out in accordance with the rules of this Association, this Standard has received the approval of the National Associations and the Official Services of the member countries of AECMA, prior to its presentation to CEN. This European Standard shall be given
17、the status of a national standard, either by publication of an identical text or by endorsement, at the latest by January 1999, and conflicting national standards shall be withdrawn at the latest by January 1999. According to the CEN/CENELEC Internal Regulations, the national standards organizations
18、 of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Contents Page Foreword2 1Scop
19、e3 2Normative references3 3Principle3 4Apparatus3 5Specimens3 6Procedure3 7Expression of results7 8Test report7 Figure 1 Example of cut-out plan for a three-ply specimen from a fabric sample4 Figure 2 Example of cut-out plan for a five-ply specimen from a narrow fabric sample5 Figure 3 Example of cu
20、t-out plan for a three-ply specimen from a sample of unidirectional tape6 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 01:29:37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 2560:1998 BSI 05-19993 1 Scope This standard specifies a method for determining the resin flow of carbon fibre preim
21、pregnates for aerospace applications. 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 reference
22、s, 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. EN 2558, Aerospace series Carbon fibre preimpregnates Determi
23、nation of the volatile content. EN 2743, Aerospace series Reinforced plastics Standard procedures for conditioning prior to testing1). 3 Principle Determination of the difference of the specimen mass per unit area before and after curing under specified conditions of temperature and pressure. 4 Appa
24、ratus 4.1 Balance accurate to 0,1 mg 4.2 Template of standard specimen 4.3 Ancillary items such as sharp knife and tweezers 4.4 Device capable of maintaining the specified temperature to 5 C and the specified pressure to 5 %. 4.5 Metal plates not less than 200 mm 200 mm and approximately 1,6 mm thic
25、k 4.6 Laboratory timer 4.7 Auxiliary materials: glass fabric, ca. six plies, 200 mm 200 mm, style 181 or similar; perforated polyvinyl fluoride (PVF) film, 0,1 mm thickness, 200 mm 200 mm; glass fabric coated with polytetrafluoroethylene (PTFE), two plies, 200 mm 200 mm. 4.8 Template or punch for cu
26、tting cured specimens. 5 Specimens 5.1 Shape and dimensions The specimen, of square shape, shall be made up of at least three plies of preimpregnate and have a total mass of at least 12 g. The dimension of the sides shall be (100 1) mm. The plies shall be assembled by crossing alternatively each lay
27、er: each fabric layer having its diagonals parallel to the warp yarns; each layer of unidirectional sheet or tape having one of its sides parallel to the fibre direction. Other specimens may be used, subject to agreement between the user and manufacturer, on condition that they have an area of 100 c
28、m2 with a tolerance of 2 %. 5.2 Number and distribution At least two specimens shall be used. The plies from which these are made shall be evenly distributed and cut along a straight line covering the width of the sample. See Figure 1 and Figure 2 for woven fabrics and Figure 3 for unidirectional sh
29、eet or tape. 6 Procedure 6.1 Conditioning 6.1.1 Preimpregnates stored at ambient temperature The amount of preimpregnate required for testing shall be sampled and conditioned in the test atmosphere (see 6.2) for a minimum of 2 h, unless otherwise specified. 6.1.2 Preimpregnates stored below ambient
30、temperature The preimpregnate, suitably packed in an airtight and solvent resistant bag to prevent moisture pick-up, shall be allowed to reach ambient temperature over a period of time depending on its mass. This time shall not be less than 8 h. When the material has reached ambient temperature, the
31、 amount required for testing shall be sampled and then conditioned in the test atmosphere (see 6.2) for a minimum of 2 h, unless otherwise specified. 6.2 Test atmosphere EN 2743-B 1) Published as AECMA pre-standard at the date of publication of this standard. Licensed Copy: sheffieldun sheffieldun,
32、na, Fri Nov 03 01:29:37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 2560:1998 4 BSI 05-1999 Figure 1 Example of cut-out plan for a three-ply specimen from a fabric sample Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 01:29:37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 2560:1998 BSI 05-
33、19995 Figure 2 Example of cut-out plan for a five-ply specimen from a narrow fabric sample Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 01:29:37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 2560:1998 6 BSI 05-1999 6.3 Time interval between conditioning and testing After conditioning, the
34、sample shall be maintained in the test atmosphere. Unless otherwise specified, tests shall be carried out within 6 h. 6.4 Tests Cut the necessary number of plies from the preimpregnate, using the appropriate template. Remove the separating film(s) and carefully superimpose the preimpregnate plies, o
35、riented alternately at 0/90, to form a uniform pack and give a specimen of total mass within the range specified in 5.1. Weigh the specimen to 1 mg (mo) and then assemble the pack between the two metal plates (see 4.5), starting with the bottom layer: one layer PTFE coated glass fabric; three layers
36、 glass bleeder fabric; one layer perforated PVF film; specimen; one layer perforated PVF film; three layers glass bleeder fabric; one layer PTFE coated glass fabric. Locate the assembly between the platens of the device (see 4.4) heated at the specified temperature and apply the specified pressure i
37、n less than 10 s, then maintain it for the specified period. NOTETemperature of the platens, pressure applied to the assembly and period of application are specified on the relevant prepreg data sheet. Remove the assembly from the device. Allow it to cool down in the test atmosphere (see 6.2). Remov
38、e the perforated PVF films and bleeder fabrics. Cut out a square of sides (70 0,7) mm from the centre of the cured specimen and weigh this to 1 mg (m1). Subject to agreement between the user and manufacturer, a circle with a diameter of (50 1) mm may be substituted for the square. Figure 3 Example o
39、f cut-out plan for a three-ply specimen from a sample of unidirectional tape Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 01:29:37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 2560:1998 BSI 05-19997 7 Expression of results 7.1 Uncorrected resin flow where: Calculate the arithmetic mean of
40、 the values obtained for F1. 7.2 Resin flow corrected for volatile content where: Calculate the arithmetic mean of the values obtained for F2. 8 Test report It shall include the following: number of this standard; all data ensuring the traceability of the material (trade mark, identification marking
41、, date of receipt, batch number, etc.); all information regarding the sampling procedure; specimen dimensions if these differ from 5.1; shape of the area cut-out from the cured specimen (see 6.4); period of conditioning; exposure time at the test atmosphere; temperature of the platens pressure and p
42、eriod of application; arithmetic mean of the uncorrected resin flow (and corrected resin flow, if required); individual values; any incident which may have affected the results. F1is the uncorrected resin flow as a percentage of the initial mass, m0is the initial mass of the specimen, in grams, m1is
43、 the mass of the square or circle cut out from the cured specimen, in grams, S1is the original area of the specimen, in square millimetres, S2is the area of the square or circle cut out from the cured specimen, in square millimetres. F2is the corrected resin flow as a percentage of the initial mass;
44、 m0is the initial mass of the specimen, in grams; m1is the mass of the square or circle cut out from the cured specimen, in grams, S1is the original area of the specimen, in square millimetres, S2is the area of the square or circle cut out from the cured specimen, in square millimetres. Vis the vola
45、tile content, determined according to EN 2558, in per cent. Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 01:29:37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 2560: 1998 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body resp
46、onsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter. Revisions British Standards are updated by amendment or revision. Users of British Standards should make sure that they possess the latest amen
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