1、BRITISH STANDARD AEROSPACE SERIESBS EN 2243-4:2005Non-metallic materials Structural adhesives Test method Part 4: Metal-honeycomb core flatwise tensile testThe European Standard EN 2243-4:2005 has the status of a British StandardICS 49.025.50g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g
2、54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 2243-4:2005This British Standard was published under the authority of the Standards Policy and Strategy Committee on 7 December 2005 BSI 7 December 2005
3、ISBN 0 580 46841 0National forewordThis British Standard is the official English language version of EN 2243-4:2005. It supersedes BS EN 2243-4:1991 which is withdrawn.The UK participation in its preparation was entrusted by Technical Committee ACE/65, Non-metallic materials for aerospace purposes (
4、excluding textiles), to Subcommittee ACE/65/-/63, Structural adhesives, which has the responsibility to:A list of organizations represented on this subcommittee can be obtained on request to its secretary.Cross-referencesThe British Standards which implement international or European publications re
5、ferred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online.This publication does not purport to include all the necessary prov
6、isions of a contract. Users are responsible for its correct application.Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation,
7、 or proposals for change, and keep UK interests informed; monitor related international and European developments and promulgate them in the UK.Summary of pagesThis document comprises a front cover, an inside front cover, the EN title page, pages 2 to 10, an inside back cover and a back cover.The BS
8、I copyright notice displayed in this document indicates when the document was last issued.Amendments issued since publicationAmd. No. Date CommentsEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 2243-4October 2005ICS 49.025.50 Supersedes EN 2243-4:1991 English VersionAerospace series - Non-metalli
9、c materials - Structural adhesives- Test method - Part 4: Metal-honeycomb core flatwise tensiletestSrie arospatiale - Matriaux non-mtalliques - Systmedadhsifs structuraux - Mthodes dessai - Partie 4 : Essaide traction perpendiculaire pour mtal-nid dabeillesLuft- und Raumfahrt - Nichtmetallische Werk
10、stoffe -Strukturelle Klebstoffsysteme - Prfverfahren - Teil 4:Zugversuch senkrecht zur Deckschicht frWabenkernverbundeThis European Standard was approved by CEN on 26 September 2005.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving th
11、is EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (Eng
12、lish, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czec
13、h Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMAL
14、ISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2005 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 2243-4:2005: E2 Contents Page Foreword 3 Introduction4 1 Scope .4 2 Normative references
15、 .4 3 Definitions, symbols and abbreviations5 4 Health and safety 5 5 Principle/Technique5 6 Resources5 7 Test samples/Test pieces.6 8 Testing procedure.7 9 Expression of results8 10 Designation .9 11 Test report .9 EN 2243-4:20053 Foreword This European Standard (EN 2243-4:2005) has been prepared b
16、y the European Association of Aerospace Manufacturers - Standardization (AECMA-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 AECM
17、A, 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 April 2006, and conflicting national standards shall be withdrawn at the latest by April 2006. Attention is dra
18、wn 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. This European Standard supersedes EN 2243-4:1991. According to the CEN/CENELEC Internal Regulations, t
19、he national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Pol
20、and, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. EN 2243-4:20054 Introduction This standard is part of the series of EN non-metallic material standards for aerospace applications. The general organization of this series is described in EN 4385. This standard is a
21、 level 3 document as defined in EN 4385. 1 Scope This standard defines the general requirements for the determination of strength of structural adhesives by testing in tension metal to honeycomb core joints, at ambient or other temperatures. Two types of test pieces are defined: Type A: direct bondi
22、ng of honeycomb to facing blocks; Type B: bonding of honeycomb between the two facing sheets, then bonding of the whole to the facing blocks. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited
23、 applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN ISO 7500-1, Metallic materials Verification of static uniaxial testing machines Part 1: Tension/ compression testing machines Verification and calibration of the force-measuring sys
24、tem (ISO 7500-1:2004). EN 2090, Aerospace series Aluminium alloy AL-P2024- T3 Clad sheet and strip 0,3 mm a 6 mm.1)EN 2334, Aerospace series Chromic-sulphuric acid pickle of aluminium and aluminium alloys. EN 2419, Aerospace series Aluminium alloy AL-P2024- T351 Plate 6 mm a 80 mm.1)EN 2497, Aerospa
25、ce series Dry abrasive blasting of titanium and titanium alloys. EN 2540, Aerospace series Steel FE-PM3902 (X7CrNiAl17-7) Air melted Solution treated and precipitation hardened Sheet and strip a 6 mm 1 240 MPa Rm 1 450 MPa.1)EN 3456, Aerospace series Titanium alloy TI-P64001 Annealed Sheet and strip
26、, hot rolled a 6 mm.1)EN 3464, Aerospace series Titanium alloy TI-P64001 Annealed Plate 6 mm a 100 mm.1)EN 3487, Aerospace series Steel FE-PA13 Softened 500 Rm 700 MPa Bar for machining De 100 mm.1)1) Published as AECMA Prestandard at the date of publication of this standard. EN 2243-4:20055 EN 4385
27、, Aerospace series Non-metallic materials General organisation of standardisation Links between types of standards.1)EN 4606, Aerospace series Aluminium honeycomb core.2)3 Definitions, symbols and abbreviations 3.1 Definitions Not applicable 3.2 Symbols and abbreviations For the purposes of this doc
28、ument, the following symbols and abbreviations apply. Rtensile strength (in mega pascals); F load at failure (in newtons); Li dimensions (in millimetres). 4 Health and safety This standard does not necessarily include all health and safety requirements, associated with its use. Persons using this st
29、andard shall be familiar with normal laboratory/test house practices. It is the responsibility of the user to establish satisfactory health and safety practices and to ensure conformity with any European, national or local laws/regulations. 5 Principle/Technique Not applicable 6 Resources 6.1 Appara
30、tus All test equipment shall be calibrated at intervals not exceeding 12 months. 6.1.1 Tensile testing machine The tensile testing machine shall conform to class 1 of EN ISO 7500-1. The failing load of the test specimen shall be within 10 % and 90 % of the upper limit of the selected loading range o
31、f the machine. 2) In preparation at the date of publication of this standard. EN 2243-4:20056 6.1.2 Recorder It shall record continuously the displacement relative to the load applied throughout the test until total failure occurs. 6.2 Materials/Reagents Not applicable 6.3 Qualification of personnel
32、 Not applicable 7 Test samples/Test pieces 7.1 Materials 7.1.1 For test temperatures up to 150 C Honeycomb core: see EN 4606. Aluminium alloy EN 2419 (facing blocks) or EN 2090 (facing sheets). 7.1.2 For test temperatures above 150 C Honeycomb core: see EN 4606. Corrosion resisting steel EN 2540 (fa
33、cing sheets) or EN 3487 (facing blocks) or titanium alloy EN 3456 and EN 3464. NOTE 1 These are the preferred (reference) alloys for high temperature test, but aluminium alloys defined in 7.1.1 can also be used. NOTE 2 The same material has to be used for all the tests if results have to be compared
34、. 7.2 Surface preparation before bonding EN 2334 or EN 2497 according to the material, or another specified preparation. 7.3 Bonding The application and curing of the adhesive system (adhesive and primer) shall be carried out according to the material standard unless otherwise agreed with the adhesi
35、ve system manufacturer. 7.4 Dimensions of panels (type B test piece) The test panel shall be of sufficient size to permit the manufacture of at least one test piece (see Figure 1). 7.5 Storage of test panels after bonding They shall be stored under the following conditions: EN 2243-4:20057 temperatu
36、re : (23 2) C; relative humidity : (50 5) %. 7.6 Cutting of panels and preparation of type B test pieces The panels shall be cut into test pieces (see Figure 1). The panels made with high temperature curing adhesives shall be cut only after a storage period of 16 hours (see note 1). NOTE 1 For batch
37、 acceptance testing, this 16 hours period can be omitted. Nevertheless, for temperature curing adhesive, care shall be taken to cut panels only when their temperature is down to ambient. Perform the cutting operation so as to avoid overheating ( 50 C) or mechanical damage to the joint (see note 2).
38、NOTE 2 A fine-tooth, circular or band-saw has been found suitable for this purpose. Cutting shall be straight and parallel. The use of cooling liquids is not permitted, unless otherwise specified. Test piece shall be bonded onto blocks by using a cold curing type adhesive. The application and curing
39、 of the adhesive system (adhesive and primer) shall be carried out according to its material standard, and care shall be taken to avoid any mechanical or thermal effect that could damage the joint to be tested. 7.7 Test pieces 7.7.1 Dimensions See Figure 1. 7.7.2 Number of specimen See material stan
40、dard. 7.7.3 Identification Each test piece shall be marked to identify the panel from which it was cut and its position in the panel. 8 Testing procedure 8.1 Dimensions measurement Measure the specimen side dimensions L1and L2with an accuracy of 0,1 mm. EN 2243-4:20058 8.2 Fixing The ends of the tes
41、t piece shall be carefully fixed to the testing machine by means of the holes provided for this purpose in the facing blocks. The attachment points of the machine and the test piece have to be aligned in such a way that an imaginary straight line can go through the centre of the test piece and the a
42、xis of the attachment points of the machine. 8.3 Test temperatures When the test temperature is different from ambient (23 2) C, then the chamber including jig shall be stabilized within the test temperature tolerance for at least 30 minutes prior to inserting the test piece. The temperature control
43、 of the test piece shall be carried out using a thermocouple. The junction of the thermocouple shall be firmly attached to the test piece in immediate contact with the metal. It shall be shielded from direct heating. 8.4 Loading For test temperature different from ambient, and unless otherwise speci
44、fied, a minimum exposure time of 10 minutes at the required temperature shall be applied prior to loading. The load shall be applied at a uniform jaws separation of 1 mm/min. (see note 1). NOTE 1 For test other than qualification, it can be tolerated to apply the load at speed between 0,5 mm/min and
45、 1,5 mm/min, or at rate between 2 000 N/min and 3 000 N/min. Record the load-displacement curve (see note 2). NOTE 2 For non-ambient temperature tests, there is a requirement for the test portion of the specimen to be within the specified temperature tolerance throughout the period of loading to fai
46、lure. The exposure time of ten minutes is normally sufficient to fulfill this requirement. Nevertheless, the test laboratory may be required to prove the heat dwell concept (procedure and conditions) by means of temperature/time records on dummy specimen(s) incorporating thermocouple(s) embedded in
47、drilled hole(s) within the test portion of the specimen. These records shall be made available to demonstrate the validity of the heat dwell conditions. In this case, for tests under non-ambient conditions, the specimen shall be placed in the grips of the test machine and the temperature monitored a
48、ccording to the heat dwell concept previously established. When it reaches the lower (or upper, for temperature below ambient) limit of the test temperature tolerance, allow the specimen to dwell within the tolerance band for a minimum of 3 minutes prior to loading. The test shall be completed withi
49、n a maximum dwell of 10 minutes. The heat-up/dwell cycle used shall be given in the test report. 9 Expression of results The tensile strength shall be calculated as follows: R = F/L1. L2EN 2243-4:20059 10 Designation EXAMPLE Description block FLATWISE TENSILE STRENGH Identity block EN2243-4A Number of this standard Type of test piece (A or B) 11 Test report The test report shall include: reference to the test method designation; the type of tensil
