BS EN 6035-2015 Aerospace series Fibre reinforced plastics Test method Determination of notched and unnotched tensile strength《航空航天系列 纤维增强塑料 试验方法 槽口和非槽口拉伸强度的测定》.pdf

1、BSI Standards PublicationBS EN 6035:2015Aerospace series Fibrereinforced plastics Testmethod Determination ofnotched and unnotched tensilestrengthBS EN 6035:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 6035:2015.The UK participation in its preparation wa

2、s 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 are responsible for i

3、ts correctapplication. The British Standards Institution 2015.Published by BSI Standards Limited 2015ISBN 978 0 580 82831 7ICS 49.025.40Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and S

4、trategy Committee on 30 November 2015.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dBS EN 6035:2015EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 6035 November 2015 ICS 49.025.40 English Version Aerospace series - Fibre reinforced plastics - Test method -Determinati

5、on of notched and unnotched tensile strengthSrie arospatiale - Matires plastiques renforces de fibres - Mthode dessai - Dtermination de la rsistance en traction lisse et en traction troue Luft- und Raumfahrt - Faserverstrkte Kunststoffe - Prfverfahren - Bestimmung der Kerbzugfestigkeit an gekerbten

6、und ungekerbten Probekrpern This 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 status of a national standard without any alteration. Up-to-date li

7、sts 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, German). A version in any other language made by translation unde

8、r 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, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Y

9、ugoslav 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 andUnited Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROP

10、EN 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. EN 6035:2015 EBS EN 6035:2015EN 6035:2015 (E) 2 Contents Page Eur

11、opean foreword . 3 1 Scope 4 2 Normative references 4 3 Terms and definitions . 4 4 Principle of the method 5 5 Designation of the method . 5 6 Apparatus . 5 7 Test specimen . 5 8 Procedure. 6 9 Presentation of the results 7 10 Test report . 8 BS EN 6035:2015EN 6035:2015 (E) 3 European foreword This

12、 document (EN 6035:2015) 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 Standard has received the approval of the National Associations and the

13、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 May 2016, and conflicting national standards shall be withdrawn

14、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 rights. According to the CEN-CENELEC Internal Regulations, the nati

15、onal 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lit

16、huania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 6035:2015EN 6035:2015 (E) 4 1 Scope This standard defines a method to be used to determine the tensile strength of notched and unnotched fib

17、re reinforced plastics. It is applicable to composite laminates with unidirectional plies or woven fabrics reinforcement. This standard does not give any direction necessary to meet health and safety requirements. It is the responsibility of the user of this standard to consult and establish appropr

18、iate 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 latest edition of the refe

19、renced document (including any amendments) applies. EN 2374, Aerospace series Glass fibre reinforced mouldings and sandwich composites Production of test panels EN 2489, Aerospace series Fibre reinforced plastics Determination of the action of test fluids EN 2565, Aerospace series Preparation of car

20、bon fibre reinforced resin panels for test purposes 1)EN 2743, Aerospace series Fibre reinforced plastics Standard procedures for conditioning prior to testing unaged materials EN 2823, Aerospace series Fibre reinforced plastics Determination of the effect of exposure to humid atmosphere on physical

21、 and mechanical characteristics 1)3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 unnotched tensile strength maximum tensile load experienced by the unnotched test specimen divided by the initial cross sectional area within the gauge length 3

22、.2 notched tensile strength maximum tensile load experienced by the notched test specimen divided by the initial gross cross sectional area within the gauge length 3.3 KTunnotched tensile strength divided by the notched tensile strength 1) Published as ASD-STAN Prestandard at the date of publication

23、 of this standard. http:/www.asd-stan.org/ BS EN 6035:2015EN 6035:2015 (E) 5 4 Principle of the method A tensile test on unnotched specimen is carried out in order to determine the original material strength. A test is performed on notched specimen to determine the residual strength. 5 Designation o

24、f the method The designation of the method used shall be in accordance with the following example: Description block TEST METHOD Identity block EN6035 A Number of this standard Laminate configuration A (see Table 1) NOTE If necessary, the code I9005 may be placed between the description block and th

25、e identity block. 6 Apparatus 6.1 Calibrated tensile test machine accurate to within 1 %, equipped with facilities to record maximum load. 6.2 Chamber adapted to the machine to carry out tests at temperature. The temperature shall be maintained within 3 C. 6.3 Timer. 6.4 Thermocouple with recorder t

26、o monitor temperature for tests at other than ambient. 6.5 Flat faced micrometre with 6 mm diameter faces, accurate to 0,01 mm. 6.6 Vernier calliper accurate to the nearest 0,1 mm. 7 Test specimen 7.1 Specimen description For the description, dimensions and tolerances see Figure 1 for notched type s

27、pecimen and Figure 2 for unnotched type specimen. The laminate configurations for the fibre directions are defined in Table 1. BS EN 6035:2015EN 6035:2015 (E) 6 7.2 Test specimen preparation The specimens are cut out from laminates. The coefficient of variation in the thickness measurements shall be

28、 smaller than 2 % per laminate. The laminates shall be produced according to EN 2565 for carbon and EN 2374 for glass. Special precautions have to be taken to ensure that no delamination occurs during machining especially for the drilling of the notched specimens. The laminate should be inspected fo

29、r example by C-Scan to establish that the laminate is worth testing. If the NDT reveals unacceptable defects, limits defined in the specification invoking the test, the laminate should not be tested. The process parameters shall be in line with the specification invoking the test. 7.3 Tabs The tests

30、 may be performed without the specimen being tabbed. However, if tabs are used they shall be strain compatible with the composite being tested either, by using precured tabs of two plies of fabric, lay-up + and 45, or by co-bonding using a suitable prepreg system. The precured tabs shall be bonded o

31、n both specimens faces with a suitable adhesive system. Care should be taken that the adhesive bonding temperature does not add any undesired post cure effect to the laminate. 7.4 Number of specimens Five specimens shall be tested per test condition, except when otherwise specified in the technical

32、specification. If tests are carried out after ageing or at a temperature different from room temperature, care should be taken to assure that room temperature/dry reference specimens, which had been machined from the same plate as the specimens under investigation are also tested. 7.5 Ageing In case

33、 of tests after immersion, the conditions shall be according to EN 2489. For tests after exposure to humid atmosphere, the conditioning shall be in accordance with EN 2823. 8 Procedure 8.1 Conditioning The storage and testing of as received specimens shall be carried out at (23 2) C, (50 5) % relati

34、ve humidity in accordance with EN 2743. Aged specimens shall be tested within a maximum of 8 h after removal from the exposure environment. 8.2 Determination of dimensions Measure and record the thickness and width at three points in the gauge length of the specimen before ageing and again before me

35、chanical testing. Use the micrometre (see 6.5) for the thickness and the vernier calliper (see 6.6) for the width. Average the three measurements. BS EN 6035:2015EN 6035:2015 (E) 7 8.3 Test at ambient temperature Place the specimen in the jaws, ensuring that it is aligned within 1 and centred on the

36、 machine axis. NOTE The jaws shall fully cover the tabs if used. Select the load range such that failure occurs between 20 % and 80 % of full scale. Tensile load shall be applied at a constant cross head speed of 2 mm/min. Record the maximum load Pr. 8.4 Test at temperature other than ambient Apply

37、a thermocouple (see 6.4) on the composite material as close as possible to the centre of the specimen and seal the thermocouple from the surrounding air by using vacuum bag sealant. After a dry specimen has reached a temperature of 2 C below the required elevated temperature or 2 C above the require

38、d sub-zero temperature, the specimen shall be maintained at the required condition for five minutes prior to testing. The above time for aged specimen is 1 min. The heat up/soak cycle used shall be given in the test report. For specimens that have been subjected to fluid immersion, apply EN 2489. Fo

39、r specimens that have undergone humidity ageing, apply EN 2823. Follow the same procedure as for the test at ambient temperature. 9 Presentation of the results 9.1 Tensile strength tFor notched specimens Prtw =tnFor unnotched specimens Prtw =tuwhere tn,tuare the tensile strengths for, notched and un

40、notched specimens, in MPa; Pr is the maximum load, in N; w is the specimen width, in mm; t is the thickness of the specimen, in mm. BS EN 6035:2015EN 6035:2015 (E) 8 9.2 Nominal tensile strength ntFor notched specimens Prtw =ntnnFor unnotched specimens Prtw =ntunwhere ntn,ntuare the nominal tensile

41、strength for, notched and un notched specimens, in MPa; Pr is the maximum load, in N; w is the specimen width, in mm; tnis the nominal thickness of the specimen, in millimetres, as specified in the relevant material specification. 9.3 KTvalue (see 3.3) K=Ttutn10 Test report The test report shall ref

42、er to this standard and shall include the following: 10.1 Complete identification of the material tested, including at least type, source, manufacturers code number, fibre areal weight, filament count, processing details. 10.2 All details regarding specimen preparation (including when applicable: ta

43、bs material, tabs adhesive and curing condition of this adhesive). 10.3 The measured specimens dimensions. 10.4 Ageing and/or exposure condition prior to the test. 10.5 Date of test, facility and identification of individuals performing the tests. 10.6 Equipment, method and test parameters used. 10.

44、7 Individual values, mean value and standard deviation of tensile strength for notched and unnotched specimen. 10.8 KT value. BS EN 6035:2015EN 6035:2015 (E) 9 10.9 Any incident which may have affected the results and any deviation from this standard. Table 1 Laminate configurations Lay-up for diffe

45、rent fibre mass per unit area Directed and quasi-isotopic laminates Fibre mass per unit area (g/m2) Quasi-isotopic laminates Type A Directed laminates Type B Tapes 130-145 (45, 0, 45, 90) 4 sym. (0, 45, 45, 0, 90) 3 sym. 160-190 (45, 0, 45, 90) 3 sym. (0, 45, 45, 0, 90) 2 sym. 260-290 (45, 0, 45, 90

46、) 2 sym. (0, 45, 45, 0, 90) 2 sym. Fabrics (45, 0,a45, 90a) nbsym. a0 is equivalent to warp direction and 90 is equivalent to welt direction. bn to be determined to have a laminate thickness as close as possible to 4 mm. Dimensions in millimetres Tabs L = 2 l + 180 mm l = table length: Function of t

47、he equipment (test machine, jaws, etc.) and / or the material to be tested (tabs must be able to transfer the shear loads). t : according to lay-up (see Table 1). Figure 1 Notched tensile specimen BS EN 6035:2015EN 6035:2015 (E) 10 Dimensions in millimetres Tabs L = 2 l + 180 mm l = table length: fu

48、nction of the equipment (test machine, jaws, etc) and / or the material to be tested (tabs must be able to transfer the shear loads). t : according to lay-up (see Table 1). NOTE Parallelism of tab faces must be maintained to within 0,05 mm across width and length. Tabs faces must be parallel with sp

49、ecimen faces to within 0,05 mm. Figure 2 Unnotched tensile specimen This page deliberately left blankBSI is the national body responsible for preparing British Standards and other standards-related publications, information and services.BSI is incorporated by Royal Charter. British Standards and other standardization products are published by BSI Standards Limited.British Standards Institution (BSI)BSI Group Headquarters389 Chiswick High Road London W4 4AL UKAbout usWe bring together business, ind