EN 2667-2-2018 Aerospace series - Non-metallic materials - Foaming structural adhesives - Test methods - Part 2 Compressive tube shear.pdf

1、BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06Aerospace series - Non-metallic materials - Foaming structural adhesives - Test methodsPart 2: Compressive tube shearBS EN 2667-2:2018EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 2667-2 January 2018 ICS 49.025.5

2、0 English Version Aerospace series - Non-metallic materials - Foaming structural adhesives - Test methods - Part 2: Compressive tube shear Srie arospatiale - Matriaux non-mtalliques - Adhsifs structuraux expansibles - Mthodes dessai - Partie 2 : Cisaillement sur tube en compression Luft- und Raumfah

3、rt - Nichtmetallische Werkstoffe - Strukturelle Expansionsklebstoffe - Prfverfahren - Teil 2: Abscherung von Rohren unter Druck This European Standard was approved by CEN on 14 May 2017. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for givi

4、ng 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 application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three offi

5、cial 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 Management Centre has the same status as the official versions. CEN members are the national standards bodies of

6、 Austria, Belgium, Bulgaria, Croatia, 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, Serbia, Slovakia, Slovenia,

7、 Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels 2018 CEN All rights of exploitation in any form and by any means reserved

8、worldwide for CEN national Members. Ref. No. EN 2667-2:2018 ENational forewordThis British Standard is the UK implementation of EN 2667-2:2018.The UK participation in its preparation was entrusted to Technical Committee ACE/65, Non-metallic materials for aerospace purposes.A list of organizations re

9、presented 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 correct application. The British Standards Institution 2018 Published by BSI Standards Limited 2018ISBN 978 0

10、 580 97652 0ICS 49.025.50Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 28 February 2018.Amendments/corrigenda issued since publicationDate Text affectedBRITISH

11、 STANDARDBS EN 2667-2:2018EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 2667-2 January 2018 ICS 49.025.50 English Version Aerospace series - Non-metallic materials - Foaming structural adhesives - Test methods - Part 2: Compressive tube shear Srie arospatiale - Matriaux non-mtalliques - Adhsi

12、fs structuraux expansibles - Mthodes dessai - Partie 2 : Cisaillement sur tube en compression Luft- und Raumfahrt - Nichtmetallische Werkstoffe - Strukturelle Expansionsklebstoffe - Prfverfahren - Teil 2: Abscherung von Rohren unter Druck This European Standard was approved by CEN on 14 May 2017. CE

13、N 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 bibliographical references concerning such national standards may be obtained on app

14、lication 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 M

15、anagement 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, La

16、tvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: R

17、ue de la Science 23, B-1040 Brussels 2018 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 2667-2:2018 EBS EN 2667-2:2018EN 2667-2:2018 (E) 2 Contents Page European foreword 3 1 Scope 4 2 Normative references 4 3 Apparatus and auxil

18、iary equipment 4 4 Test tubes, test specimens . 5 5 Procedure 6 6 Expression of results 7 7 Designation . 8 8 Test report . 8 BS EN 2667-2:2018EN 2667-2:2018 (E) 3 European foreword This document (EN 2667-2:2018) has been prepared by the Aerospace and Defence Industries Association of Europe - Stand

19、ardization (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 Official Services of the member countries of ASD, prior to its presentation to CEN. This European Standard shall

20、 be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by July 2018, and conflicting national standards shall be withdrawn at the latest by July 2018. Attention is drawn to the possibility that some of the elements of this document ma

21、y be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights. According to the CEN-CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulg

22、aria, Croatia, 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, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzer

23、land, Turkey and the United Kingdom. BS EN 2667-2:2018EN 2667-2:2018 (E) 4 1 Scope This European Standard defines the test method for determining the bond strength of structural foaming adhesive films or pastes by means of the tube test method. This test method is suitable for determining bond stren

24、gth in relation to the density after curing of the adhesive foam by means of compressive tube shear specimens. It preferably applies to high expansion ratios, i.e. 50 % measured according to the method EN 2667-3. 2 Normative references The following documents, in whole or in part, are normatively re

25、ferenced 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 referenced document (including any amendments) applies. EN 2334, Aerospace series Chromic-sulphuric acid pickle of aluminium an

26、d aluminium alloys EN 2388, Aluminium alloy 2024-T351 Tubes for structures 0,6 mm a 12,5 mm Aerospace series1)EN 2667-3, Aerospace series Non-metallic materials Foaming structural adhesives films Test methods Part 3: Expansion ratio and volatile content2)ISO 7500-1, Metallic materials Calibration an

27、d verification of static uniaxial testing machines Part 1: Tension/compression testing machines Calibration and verification of the force-measuring system 3 Apparatus and auxiliary equipment 3.1 Tensile testing machine The test machine shall be approved to ISO 7500-1 and so designed that the breakin

28、g load lies between 10 % and 90 % of the selected full-scale capacity. The loads shall be recorded to an accuracy of 1 %. 3.2 Auxiliary equipment air circulating oven with an accuracy of 5 C; balance with an accuracy to the nearest 0,01 g; band saw; thermoelectric couple; mounting device per Figure

29、1. 1) Published as ASD-STAN Standard at the date of publication of this standard by AeroSpace and Defence industries Association of Europe - Standardization (ASD-STAN) (www.asd-stan.org) 2) Published as ASD-STAN Prestandard at the date of publication of this standard by AeroSpace and Defence industr

30、ies Association of Europe - Standardization (ASD-STAN) (www.asd-stan.org) BS EN 2667-2:2018EN 2667-2:2018 (E) 5 4 Test tubes, test specimens 4.1 Test tubes The shape and the dimensions of the concentric tubes shall be in conformity with Figure 2. 4.1.1 Materials The following materials are normally

31、to be used: aluminium alloy 2024 - T351, in accordance with EN 2388, or; aluminium alloy 5052-0, in tubes for structures 0,6 mm a 12,5 mm. For test temperature exceeding 150 C, the same aluminium alloys shall be used after verification of their test temperature capability. 4.1.2 Surface preparation

32、Surface preparation before bonding shall be in accordance with EN 2334. 4.1.3 Bonding and weighing of test tubes Bonding of the test tubes shall take place within 4 h after completion of the preliminary surface treatment. The test tubes may require application of a primer to ensure cohesive failure,

33、 i.e. failure within the adhesive. The application of the foaming adhesive system (adhesive and primer, if necessary) as well as the curing shall be carried out in accordance with the adhesive manufacturers instructions and the material standard. The tubes shall be weighed to the nearest 0,01 g: m1,

34、 m2. A mass m3of adhesive 3)defined in the material standard, or in line with the manufacturers recommendation, shall be rolled or spread evenly over the entire surface of the inner tube. The two tubes (length between 100 mm and 230 mm) shall then be assembled using centering caps (see Figure 3) wit

35、h the interposition at both ends of a temperature resistant washer made out of knitted fabric (stitches of approximately 100 m) to retain the adhesive while allowing air and reaction gases to escape. The curing process shall be carried out with the tube in a horizontal position and according to the

36、material standard. The heat-up rate of the test tubes shall range from 1 C/min to 6 C/min and shall be monitored and recorded using a thermoelectric couple placed in the adhesive at the end of the test tubes. After the end of the cure, cool the test assembly until it reaches ambient temperature. The

37、n remove the curing assembly described in Figure 3 and disassemble to obtain the test tubes. 3) The determination of this mass m3depends on the density, on thickness and on the expansion ratio of the adhesive as well as on the length of test tubes. BS EN 2667-2:2018EN 2667-2:2018 (E) 6 The test tube

38、s shall be weighed to the nearest 0,01 g: m4. 4.1.4 Storage of test tubes after curing The final test tubes shall be conditioned and tested after a storage period of at least 16 h after curing and under the following conditions: temperature : (23 2) C; relative humidity : (50 5) %. 4.2 Test specimen

39、s 4.2.1 Cutting test specimens The cutting of the test tubes into test specimens shall be done with an appropriate tool such as a band saw, in accordance with Figure 2. The number of teeth and the set of the saw as well as the feed and cutting speed shall be chosen so to minimize thermal and mechani

40、cal stressing. The cuts shall be plane and perpendicular to the tube axis and no cooling fluid shall be used. It is possible to obtain five test specimens per test tube of 100 mm and fifteen test specimens per test tube of 230 mm, while discarding a minimum of 10 mm at each end. Each test specimen s

41、hall be identified with an individual reference mark so as to locate the number of the test tube from which it originated as well as its position in this tube. 4.2.2 Quantity There shall be a minimum of five individual test specimens for each test. 5 Procedure Tests shall be performed at the tempera

42、tures specified in the material standard. For all tests carried out at a temperature other than ambient the heat-up rate or the cooling rate of the test specimen shall be less than 10 C/min. Load shall be applied after stabilization at the specified temperature for a minimum of 10 min and a maximum

43、of 30 min (unless otherwise specified by the supplier). For all temperatures, with the exception of ambient temperature (23 2) C, the temperature of the test specimen shall be measured by means of a thermoelectric couple, fixed to the outer surface of the test specimen in accordance with Figure 1. T

44、he test set-up (see Figure 1) comprises a cylindrical ram and a base acting as spacers. The supports shall be vertically centred in respect to the test specimen so that the external ring rests fully on the support base. Bond strength shall be determined by shearing the inner tube downward with the t

45、est set up as shown in Figure 1. BS EN 2667-2:2018EN 2667-2:2018 (E) 7 The load of the test specimen shall be applied at a constant rate ranging from 2 000 N/min to 5 000 N/min until failure. 6 Expression of results Calculate the bond strength for each test specimen as follows: hdF=1.max where is th

46、e shear strength on tubes, in megapascals; Fmax.is the maximum load, in newtons; d1is the outside diameter of the inner tube, in millimetres; h is the height of the test piece, in millimetres. Dimensions d and h shall be measured to within 0,1 mm. Calculate the average bond strength of the series of

47、 test specimens. Calculate the density of the foam adhesives to the nearest 0,01 g/cm3as follows: +=2122214)(0004ddLmmmDwhere D is the tube density, in grams per cubic centimetre; m1is the outer tube mass, in grams; m2is the inner tube mass, in grams; m4is the mass of test tubes, in grams; L is the

48、length of the tubes, in millimetres; d1is the outside diameter of the inner tube, in millimetres; d2is the inner diameter of the outside tubes, in millimetres. BS EN 2667-2:2018EN 2667-2:2018 (E) 8 7 Designation EXAMPLE EN2667-2 Number of this standard 8 Test report It shall include the following: r

49、eference to this standard; complete identification of the foaming adhesive and primer if any, including the type, name and address of the manufacturer, date of manufacture, batch number and material standard number; storage conditions of the foaming adhesive before curing (temperature, humidity); complete identification of the metal used and its surface preparation, including storage up to the bonding; processing and curing conditions (equipment, heat-up rate, c