1、BRITISH STANDARD AEROSPACE SERIESBS EN 2243-3:2005Non-metallic materials Structural adhesives Test method Part 3: Peeling test metal-honeycomb coreThe European Standard EN 2243-3:2005 has the status of a British StandardICS 49.025.50g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g5
2、1g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 2243-3:2005This British Standard was published under the authority of the Standards Policy and Strategy Committee on 17 November 2005 BSI 17 November 2005ISBN 0
3、580 46838 0National forewordThis British Standard is the official English language version of EN 2243-3:2005. It supersedes BS EN 2243-3:1992 which is withdrawn.The UK participation in its preparation was entrusted by Technical Committee ACE/65, Non-metallic materials for aerospace purposes (excludi
4、ng 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 referred
5、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 provisions
6、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, or pro
7、posals 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 12, an inside back cover and a back cover.The BSI copyr
8、ight notice displayed in this document indicates when the document was last issued.Amendments issued since publicationAmd. No. Date CommentsEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 2243-3October 2005ICS 49.025.50 Supersedes EN 2243-3:1991 English VersionAerospace series - Non-metallic mater
9、ials - Structural adhesives- Test method - Part 3: Peeling test metal-honeycomb coreSrie arospatiale - Matriaux non-mtalliques - Systmedadhsifs structuraux - Mthodes dessai - Partie 3 : Essaide pelage mtal-nid dabeillesLuft- und Raumfahrt - Nichtmetallische Werkstoffe -Strukturelle Klebstoffsysteme
10、- Prfverfahren - Teil 3:Trommelschlversuch fr WabenkernverbundeThis 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 this EuropeanStandard the status of a national standard w
11、ithout 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 (English, French, German). A version in any other language
12、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, Czech Republic, Denmark, Estonia, Finland, France,Germany,
13、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 NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre:
14、 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 2243-3:2005: E2 Contents Page Foreword 3 Introduction4 1 Scope .4 2 Normative references .4 3 Definitions, symbols and abbreviations4 4 Health
15、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 2243-3:20053 Foreword This European Standard (EN 2243-3:2005) has been prepared by the European Association of Aerospace Manufacturers -
16、 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 AECMA, prior to its presentation to CEN. This European Stan
17、dard 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 drawn to the possibility that some of the elements of this
18、 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 2243-3:1991. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following co
19、untries 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, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switz
20、erland and the United Kingdom. EN 2243-3:20054 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 level 3 document as defined in EN 4385. 1 Scope This s
21、tandard defines the general requirements for the determination of strength of structural adhesives by testing in peel metal to honeycomb core joints, at ambient or other temperatures. 2 Normative references The following referenced documents are indispensable for the application of this document. Fo
22、r dated references, only the edition cited 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
23、and calibration of the force-measuring system (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 4385, Aerospace series Non-metallic materials Gen
24、eral 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 document, the following symbols and abbreviation
25、s apply. F peeling load (in newtons); F0 rolling load (in newtons) = Load necessary to roll up the skin; 1) Published as AECMA Prestandard at the date of publication of this standard. 2) In preparation at the date of publication of this standard. EN 2243-3:20055 F1 peeling and rolling load (in newto
26、ns); W width of test piece (in centimeter); peeling strength (in newtons . centimetre/centimetre). 4 Health and safety This standard does not necessarily include all health and safety requirements, associated with its use. Persons using this standard shall be familiar with normal laboratory/test hou
27、se 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 Apparatus All test equipment shall be calibrated at intervals
28、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 of the machine. 6.1.2 Fixing The peeling jig consists of
29、a drum with lateral flanges, flexible load strips or cords and suitable clamps for fastening the test pieces in. The arrangement shown in Figure 1 has proved efficient. The drum radius is 50 mm. The radii of the flanges including half the thickness of the flexible load strips or cords are 12,5 mm la
30、rger than the drum radius. The top clamp, for introducing the load into the test piece, and the clamp on the drum shall be disposed so that the covering layers are tangential to the drum surface in the beginning of test as shown in Figure 1. The drum shall be counter-balanced by fixing a mass on the
31、 drum opposite the clamp. The maximum mass of the peeling jig shall not exceed 3,5 kg. 6.1.3 Recorder It shall record continuously the displacement (see Figure 3) relative to the load applied throughout the test until total failure occurs. 6.2 Materials/Reagents Not applicable EN 2243-3:20056 6.3 Qu
32、alification of personnel Not applicable 7 Test samples/Test pieces 7.1 Materials Aluminium alloy EN 2090 Honeycomb core: see EN 4606. 7.2 Surface preparation before bonding EN 2334 unless otherwise specified. 7.3 Bonding The application and curing of the adhesive system (adhesive and primer) shall b
33、e carried out according to the material standard unless otherwise agreed with the adhesive system manufacturer. 7.4 Dimensions of panels The test panel shall be of sufficient size to permit the manufacture of at least one test piece (see Figure 2). 7.5 Storage of test panels after bonding They shall
34、 be stored under the following conditions: temperature : (23 2) C; relative humidity : (50 5) %. 7.6 Cutting of panels and preparation of test pieces The panels shall be cut into test pieces (see Figure 2). The panels made with high temperature curing adhesives shall be cut only after a storage peri
35、od of 16 hours (see note 1). NOTE 1 For batch 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
36、mechanical damage to the joint (see note 2). 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. EN 2243-3:20057 7.7 Test pieces 7.7.1 Dimensions See Figur
37、e 2. 7.7.2 Number of specimens See material standard. 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. Ensure top skin is labelled for traceability. 8 Testing procedure 8.1 Dimensions measurement Measure the width W of te
38、st piece with an accuracy of 0,1 mm. 8.2 Fixing See Figure 1. The test piece shall be carefully fixed to the drum as shown in Figure 1. The other end of the test piece shall be fixed on the top of the test machine using the top clamp. When the test piece with the peeling jig is suspended on the top
39、grid of the test machine, fastened by means of a bolt through the clamp, the test machine indicator shall be set at 0 and the yoke of the peeling jig shall be fastened by means of a bolt to a fitting in the bottom grip of the machine. 8.3 Test temperatures When the test temperature is different from
40、 ambient temperature (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 of the test piece shall be carried out using a thermocouple. The junction of the thermocouple sha
41、ll 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 specified (see note), a minimum exposure time of 10 minutes at the required temperature shall be applie
42、d prior to loading. EN 2243-3:20058 NOTE 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 failure. The exposure time of 10 minutes is normally sufficient to fulfil this
43、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 drilled hole(s) within the test portion of the specimen. These records shall b
44、e 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 according to the heat dwell concept previously established. When it reaches the
45、 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 within a maximum dwell of 10 minutes. The heat-up/dwell cycle used shall be given i
46、n the test report. The load shall be applied at a uniform jaws separation of 25 mm/min. A minimum length of 150 mm shall be peeled. Record the load-displacement curve. 8.5 Determination of rolling load Rolling load F0is determined by fixing an unbonded facing sheet as described in 6.3.2, in the peel
47、ing jig and test machine, and applying a traction load to roll it up. The load used shall be recorded during the rolling operation and shall remain approximately constant. 9 Expression of results The peeling diagram shall be evaluated as follows: The average peeling and rolling load F1shall be deter
48、mined over a peeling length of 125 mm, by inserting the estimated average value into the diagram as shown in Figure 3. The results of the first 25 mm of the peel separation on the specimen as shown on the peeling diagram after the first maximum load are to be excluded from the assessment of the aver
49、age value. In case of doubt, the average peeling load shall be determined by means of a planimeter. The value of peeling load Fis calculated by the following equation: F = F1 F0The peeling strength shall be expressed as follows: WF= EN 2243-3:20059 10 Designation EXAMPLE Description block PEEL STRENGTH Identity block EN2243-3 Number of this standard 11 Test report The test report shall include: reference to the test method designation; the type of tensile testing machine, the speed of loading, the exposure
