1、Test method g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58Part 2: Peel metal-metalThe European Standard EN 2243-2:2005 has the status of a British
2、 StandardICS 49.025.50Non-metallic materials Structural adhesives BRITISH STANDARD AEROSPACE SERIESBS EN 2243-2:2005BS EN 2243-2:2005This British Standard was published under the authority of the Standards Policy and Strategy Committee on 17 November 2005 BSI 17 November 2005ISBN 0 580 46840 2A list
3、 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 to in this document may be found in the BSI Catalogue under the section entitled “International Standar
4、ds 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 of a contract. Users are responsible for its correct application.Compliance with a British Standard doe
5、s not of itself confer immunity from legal obligations.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 copyright notice displayed in this document indicates when the document was last issued
6、.Amendments issued since publicationAmd. No. Date Comments aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep UK interests informed; monitor related international and European develo
7、pments and promulgate them in the UK.National forewordThis British Standard is the official English language version of The UK participation in its preparation was entrusted by Technical Committee ACE/65, Non-metallic materials for aerospace purposes (excluding textiles), to Subcommittee ACE/65/-/63
8、, Structural adhesives, which has the responsibility to:EN 2243-2:2005. It supersedes BS EN 2243-2:1991 which is withdrawn.EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 2243-2October 2005ICS 49.025.50 Supersedes EN 2243-2:1991 English VersionAerospace series - Non-metallic materials - Structural
9、 adhesives- Test method - Part 2: Peel metal-metalSrie arospatiale - Matriaux non-mtalliques - Systmedadhsifs structuraux - Mthodes dessai - Partie 2 : Essaide pelage mtal-mtalLuft- und Raumfahrt - Nichtmetallische Werkstoffe -Strukturelle Klebstoffsysteme - Prfverfahren - Teil 2:Rollen-Schlversuch
10、Metall-MetallThis 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 without any alteration. Up-to-date lists and biblio
11、graphical 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 made by translationunder the responsibility of a C
12、EN 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, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
13、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: rue de Stassart, 36 B-1050 Brussels 2005 CEN All
14、rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 2243-2:2005: E2 Contents Page Foreword 3 Introduction4 1 Scope .4 2 Normative references .4 3 Definitions, symbols and abbreviations4 4 Health and safety 5 5 Principle/Technique5 6 Resources5 7
15、 Test samples/Test pieces.5 8 Testing procedure.7 9 Expression of results8 10 Designation .8 11 Test report .8 EN 2243-2:20053 Foreword This European Standard (EN 2243-2:2005) has been prepared by the European Association of Aerospace Manufacturers - Standardization (AECMA-STAN). After enquiries and
16、 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 Standard shall be given the status of a national stand
17、ard, 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 document may be the subject of patent rights. CEN
18、 and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This European Standard supersedes EN 2243-2:1991. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Stand
19、ard: 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, Switzerland and the United Kingdom. EN 2243-2:20054 Int
20、roduction 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 standard defines the general requirements for the d
21、etermination of strength of structural adhesives by testing in peel metal to metal joints, at ambient or other temperatures. This method is not suitable for adhesives having an average peeling strength of less than 30 N per 25 mm. 2 Normative references The following referenced documents are indispe
22、nsable for the application of this document. For 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: Tens
23、ion/compression testing machines Verification 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 438
24、5, Aerospace series Non-metallic materials General organisation of standardisation Links between types of standards.1)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 abbreviations apply
25、. F peeling load (in newtons); W width of the specimen (in centimetres); peeling strength (in newtons/centimetres). 1) Published as AECMA Prestandard at the date of publication of this standard. EN 2243-2:20055 4 Health and safety This standard does not necessarily include all health and safety requ
26、irements, associated with its use. Persons using this standard 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 P
27、rinciple/Technique Not applicable 6 Resources 6.1 Apparatus 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
28、 90 % of the upper limit of the selected loading range of the machine. 6.1.2 Fixing Peeling jig, see Figure 1. 6.1.3 Recorder It shall record continuously the displacement (see Figure 3) relative to the load applied throughout the test until failure occurs. 6.2 Materials/Reagents Not applicable 6.3
29、Qualification of personnel Not applicable 7 Test samples/Test pieces 7.1 Materials Aluminium alloy EN 2090 7.2 Surface preparation before bonding EN 2334 unless otherwise specified EN 2243-2:20056 7.3 Bonding The application and curing of the adhesive system (adhesive and primer) shall be carried ou
30、t according to the material standard unless otherwise agreed with the adhesive system manufacturer. 7.4 Dimensions of panels See Figure 2. 7.5 Storage of test panels after bonding They shall be stored under the following conditions: temperature : (23 2) C; relative humidity : (50 5) %. 7.6 Cutting o
31、f 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 period of 16 hours (see note 1). NOTE 1 For batch acceptance testing, this 16 hours period can be omitted. Neverth
32、eless, 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). NOTE 2 A fine-tooth, circular or band saw has been found suitable
33、 for this purpose. Cutting shall be straight and parallel. The use of cooling liquids is not permitted, unless otherwise specified. 7.7 Test pieces 7.7.1 Dimensions See Figure 2. 7.7.2 Number of specimen See material standard. 7.7.3 Identification Each test piece shall be marked to identify the pane
34、l from which it was cut and its position in the panel. EN 2243-2:20057 8 Testing procedure 8.1 Dimensions measurement Measure the width W with an accuracy of 0,1 mm. Measure the thickness of the adhesive in the middle of the overlap at both sides of the test piece with an accuracy of 0,01 mm. The av
35、erage thickness shall be determined. 8.2 Fixing See Figure 2. Install the peeling jig in the upper grip of the test machine. Insert test piece in peeling jig. Fix the non-bonded, thin end of the test piece that has been passed through the rollers in the lower grip of the test machine. 8.3 Test tempe
36、ratures When the test temperature is different from ambient temperature (23 2) C, then the chamber including peeling 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
37、 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 specified (see note), a minimum exposure tim
38、e of 10 minutes at the required temperature shall be applied prior to loading. 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 min
39、utes is normally sufficient to fulfil 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 drilled hole(s) within the test por
40、tion 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 according to the heat dwell concept
41、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 within a maximum dwell of 10 minutes. Th
42、e heat-up/dwell cycle used shall be given in the test report. The load shall be applied at a uniform jaws separation of 50 mm/min to 150 mm/min. A minimum length of 150 mm shall be peeled. Record the load-displacement curve. EN 2243-2:20058 9 Expression of results The peeling diagram shall be evalua
43、ted as follows: The average peeling load shall be determined over a peeling strength of 125 mm, by inserting the estimated average value into the diagram as shown in Figure 3. The results of the first 10 mm of the peel separation on the specimen as shown on the peeling diagram after the first maximu
44、m load are to be excluded from the assessment of the average value. In case of doubt, the average peeling load shall be determined by means of a planimeter. The peeling strength shall be expressed in newtons/centimeter as follows: WF= 10 Designation EXAMPLE Description block PEEL STRENGTH Identity b
45、lock EN2243-2 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 conditions and test temperature; complete identification of the adhesive system, including the type, m
46、anufacturer, date of manufacture, batch number, material standard or specification number; complete identification of the metal used; detailed information about the surface preparation before bonding; application and bonding conditions including the bonding method (press, autoclave, .), pressure on
47、the adhesive joint, heat-up rate, curing time and temperature; information about individual test piece including traceability from panel, actual dimensions, sheet thickness and bond line thickness; type of recorder; expression of individual results, including peel load, nature and location of failur
48、e with estimated percentage of failure in cohesion and/or adhesion in adhesive or primer; EN 2243-2:20059 associated diagram; in case of multiple tests: number of test pieces; average, standard deviation, maximum and minimum values of the test series. traceability to personnel performing the test wo
49、rk; any incident which may have affected the result; any deviation from this standard described in detail; date of test. EN 2243-2:200510 Dimensions in millimetres Key 1 Roller bearing 2 Steel rollers Figure 1 Peeling jig 1 2 EN 2243-2:200511 Dimensions in millimetres Key 1 Discard 2 Width according to number of test pieces 3 Not bonded Figure 2 Test piece 32 EN 2243-2:200512 Dimensions in millimetres Key 1 Load F 2 Peeling length 3 Average value Figure 3 Typical peeling d
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