1、BSI Standards PublicationBS EN 6033:2015Aerospace series Carbonfibre reinforced plastics Test method Determinationof interlaminar fracturetoughness energy Mode I GICBS EN 6033:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 6033:2015.The UK participation in
2、 its preparation was entrusted to TechnicalCommittee ACE/65, Non-metallic materials for aerospace purposes.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users ar
3、e responsible for its correctapplication. The British Standards Institution 2015.Published by BSI Standards Limited 2015ISBN 978 0 580 82985 7ICS 49.025.40Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theSta
4、ndards Policy and Strategy Committee on 30 November 2015.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dBS EN 6033:2015EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 6033 November 2015 ICS 49.025.40 English Version Aerospace series - Carbon fibre reinforced plastics
5、- Test method - Determination of interlaminar fracture toughness energy - Mode I - GIC Srie arospatiale - Matires plastiques renforces de fibres de carbone - Mthode dessai - Dtermination de lnergie de tnacit en rupture interlaminaire - Mode I - GIC Luft- und Raumfahrt - Kohlenstoffaserverstrkte Kuns
6、tstoffe - Prfverfahren - Bestimmung der interlaminaren Energiefreisetzungsrate - Mode I - GICThis European Standard was approved by CEN on 10 August 2013. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the st
7、atus 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-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French,
8、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 Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cro
9、atia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey andU
10、nited Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2015 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No.
11、EN 6033:2015 EBS EN 6033:2015EN 6033:2015 (E) 2 Contents Page European foreword . 3 1 Scope 4 2 Normative references 4 3 Terms and definitions . 4 4 Principle of the method 4 5 Designation of the method . 5 6 Apparatus . 5 7 Test specimen . 5 8 Procedure. 6 9 Presentation of the results 7 10 Test re
12、port . 7 BS EN 6033:2015EN 6033:2015 (E) 3 European foreword This document (EN 6033:2015) 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 Standar
13、d 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 latest by
14、 May 2016, and conflicting national standards shall be withdrawn at the latest by May 2016. 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 such patent ri
15、ghts. 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 Macedonia, Franc
16、e, 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 6033:2015EN 6033:2015 (E) 4 1 Scope This standard specifies the procedure t
17、o determine the mode I interlaminar fracture toughness energy GICof carbon fibre composites manufactured from unidirectional tape or woven fabric. This standard does not give any directions necessary to meet health and safety requirements. It is the responsibility of the user of this standard to con
18、sult and establish appropriate health and safety precautions. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the
19、latest edition of the referenced document (including any amendments) applies. EN 2565, Aerospace series Preparation of carbon fibre reinforced resin panels for test purposes 1)EN 2743, Aerospace series Fibre reinforced plastics Standard procedures for conditioning prior to testing unaged materials E
20、N 6034, Aerospace series Carbon fibre reinforced plastics Test method Determination of interlaminar fracture toughness energy Mode II GIIC1)3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 interlaminar fracture toughness energy the interlamina
21、r fracture toughness energy is the energy per unit plate width which is necessary to produce an unit crack growth at an interlaminar crack between two plies of a laminate 3.2 Mode I the mode indicates the method by which the load is applied to produce the crack. A mode I crack extends as a result of
22、 peel forces perpendicular to the crack plane 3.3 GICGICis the designation of the interlaminar fracture toughness energy determined by a mode I test procedure 4 Principle of the method The precracked specimen is loaded continuously by peel-forces until a total propagated crack length of approximatel
23、y 100 mm has been achieved. During the crack propagation the loads and cross head displacement of the test machine will be recorded continuously. The interlaminar fracture toughness energy is calculated from the propagated crack length and the applied energy determined from the load cross head displ
24、acement diagram. 1) Published as ASD-STAN Prestandard at the date of publication of this standard. http:/www.asd-stan.org/ BS EN 6033:2015EN 6033:2015 (E) 5 5 Designation of the method The designation of the method used shall be drawn up according to the following example: Description block Carbon f
25、ibre reinforced plastic materials Determination of interlaminar fracture toughness energy Mode I GIC- test Identity block EN6033 Number of this standard NOTE If necessary, the code I9005 may be placed between the description block and the identity block. 6 Apparatus 6.1 Tensile testing machine, accu
26、rate to within 1 %, in the load range used. The misalignment of the grip faces must be less than 0,05 mm at 300 mm separation, increasing by less than 0,1 mm per metre at separations above 300 mm. Parallelism between loading heads should be better than 0,4 mm at any position of the cross head. 6.2 A
27、s tabs, bent aluminium strips of about 0,5 mm - 0,7 mm thick or hinged metallic tabs of about 1,0 mm to 1,5 mm thickness shall be used as shown in Figure 1. 6.3 A slide caliper with an accuracy to the nearest 0,05 mm. 6.4 Release film e.g. PTFE (Polytetrafluorethylene) foil of about (0,02 to 0,03) m
28、m thickness. 6.5 Microscope of magnification of 15-25. 7 Test specimen 7.1 Test specimen description The dimensions of the specimens shall be in accordance with Figure 1. If fabric is used, the thickness shall be of the nearest to Figure 1. The fibre direction for tape material shall be at 0 to the
29、specimen length and at 0/90 for fabric material. If the specification invoking the test also asks for GIIC- results according to EN 6034 from the same material, it is recommended to use the remainder of the laminate as a test specimen for GIIC- test (see EN 6034 for specimen dimensions). 7.2 Test sp
30、ecimen preparation The test specimens shall be cut from flat laminates which have been processed in accordance with EN 2565. BS EN 6033:2015EN 6033:2015 (E) 6 Cure processing parameters as temperature, pressure and time, as well as any detailed and/or specific information regarding the process if an
31、y, shall be given in accordance with the relevant specification invoking the test. To introduce the initial crack, a double layer of release film (see 6.4) with dimensions according to Figure 1 shall be incorporated at the mid-plane of the laminate. CAUTION When testing fabric material, the results
32、may be influenced by the positioning of the crack between the layers (nested, unnested etc.). It shall be fixed clearly before starting manufacturing the specimens, which interlaminar area shall be tested and how to manufacture specimens. The metallic end tabs shall be bonded to the specimen accordi
33、ng to Figure 1. A high peel strength material shall be used for bonding the tab. The bonding process (surface preparation, curing temperature) may not affect the properties of the material to be tested. 8 Procedure 8.1 Conditioning Specimens are to be tested dry or in the as cured state at room temp
34、erature, should first be conditioned at (23 2) C, (50 % 5 %) RH in accordance with EN 2743 if not otherwised imposed by the relevant specification invoking the test. 8.2 Determination of dimensions The average of a minimum of three measurements along the length of the specimen is to be recorded. The
35、 width of the specimens shall be measured to the nearest 0,1 mm using the slide caliper (see 6.3). 8.3 Testing Align the specimen in the test fixture. To avoid any influence of the incorporated release film the specimen shall be loaded until an initial crack length of 10 mm to 15 mm has been achieve
36、d. Mark the position of the initial crack tip after preloading on both sides of the specimen using microscope of 6.5. A thin layer of white ink applied to the longitudinal side faces of the specimen may be used to facilitate this measurement. Load the specimen constantly with a cross head speed of 1
37、0 mm/min until a total crack length of about 100 mm has been achieved Record load and cross head displacement during the test. Mark the final crack length on both sides of the specimen using the microscope of 6.5. Unload the specimen. Determine the propagated crack length (see Clause 9). Analyse the
38、 results in accordance with Clause 9. BS EN 6033:2015EN 6033:2015 (E) 7 9 Presentation of the results To calculate the interlaminar fracture toughness energy, the following formula shall be used: Aaw= 6ICG 10 where GICis the fracture toughness energy, in J/m2; A is the energy to achieve the total pr
39、opagated crack length, in J (integration of the area of the load-cross head displacement diagram according to Figure 2); a is the propagated crack length, in mm (final crack length minus initial crack length); w is the width of the specimen, in mm. 10 Test report The test report shall refer to this
40、standard and include the following: 10.1 Complete identification of the tested material, including manufacturers name, designation, batch number etc. 10.2 All details about the preparation of specimens. 10.3 The measured specimen dimensions. 10.4 Ageing and/or exposure conditions prior to the test.
41、10.5 Date of test, facility and identification of individuals performing the tests. 10.6 Equipment, method and test parameters used. 10.7 Individual test results and calculations plus a set of typical load-cross head displacement curves. Individual curves shall be kept in file by the test laboratory
42、. 10.8 Any incident which may have effected the results and any deviation from this standard. Fibre bridging in the crack or movement of the crack to plies adjacent to the mid plies shall be reported. BS EN 6033:2015EN 6033:2015 (E) 8 Dimensions in millimetres Key 1 Release film (see 6.4) 2 Tabs (se
43、e 6.2) L = (250 5) mm l1= (25 1) mm w = (25,0 0,2) mm t = (3,0 0,2) mm Figure 1 Test specimen BS EN 6033:2015EN 6033:2015 (E) 9 Load(N)Cross head displacement (m) Key D1Cross head displacement at initial crack length (see Clause 8). D2Cross head displacement at final crack length (see Clause 8). A C
44、alculated energy (see Clause 8). Figure 2 Load Cross head displacement diagram This page deliberately left blankThis page deliberately left blankBSI is the national body responsible for preparing British Standards and other standards-related publications, information and services.BSI is incorporated
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