1、AECMA STANDARD prEN 2243-2 NORME AECMA Edition P 1 AECMA NORM December 2001 PUBLISHED BY THE EUROPEAN ASSOCIATION OF AEROSPACE INDUSTRIES - STANDARDIZATION (AECMA-STAN) Gulledelle 94 - 6-1200 BRUXELLES - Tel. (42) 2 775 8110 - Fax. (+32) 2 775 811 1 ICs: Will supersede EN 2243-2: 1991 Descriptors: E
2、NGLISH VERSION Aerospace series Non-metallic materials Structural ad hesives Test method Part 2: Peel metal-metal Srie arospatiale Matriaux non-mtalliques Systme dadhsifs structuraux Mthodes dessai Partie 2 : Essai de pelage mtal-mtal Luft- und Raumfahrt Nichtmetallische Werkstoffe Strukturelle Kleb
3、stoffsysteme Prfvetfahren Teil 2: Rollen-Schlversuch Metall-Metall This “Aerospace Series“ Prestandard has been drawn up under the responsibility of AECMA-STAN (The European Association of Aerospace Industries - Standardization). It is published on green paper for the needs of the European Aerospace
4、 Industry. It has been technically approved by the experts of the concerned Domain following member comments. Subsequent to the publication of this Prestandard, the technical content shall not be changed to an extent that interchangeability is affected, physically or functionally, without re-identif
5、ication of the standard. After examination and review by users and formal agreement of AECMA-STAN it will be submitted as a draft European Standard to CEN (European Committee for Standardization) for formal vote. Nota - Extra copies can be supplied by B.N.A.E. - Technopolis 54 - 199. rue Jean-Jacque
6、s Rousseau - 92138 ISSY-LES-MOULINEAUX CEDEX Edition approved for publication 2001 -1 2-28 Comments should be sent within six months after the date of publication to I Material Domain AECMA-STAN Gulledelle 94 6-1200 BRUXELLES Mr Pays Page 2 prEN 2243-2: 2001 Contents Page O 1 2 3 3.1 3.2 4 5 6 6.1 6
7、.2 6.3 7 7.1 7.2 7.3 7.4 7.5 7.6 7.7 8 8.1 8.2 8.3 8.4 9 10 11 Introduction . . . . Normative references . . . . Health and safety PrincipleTTechnique . . MaterialclReagents . . Cutting of panels and preparation of test pieces . Test pieces Testing procedure . Dimensions measurement . Fixing . . . .
8、 Designation . 3 3 3 3 3 3 4 4 4 4 4 4 4 4 4 4 5 5 5 5 5 5 5 6 6 6 6 7 Page 3 prEN 2243-2: 2001 O Introduction This standard is part of the series of EN non-metallic material standards for aerospace applications. The general organisation of this series is described in EN 4385. This standard is a lev
9、el 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 peel metal to metal joints, at ambient or other temperatures. This method is not suitable for adhesives having an average peeling streng
10、th of less than 30 N per 25 mm. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the next and the publications are listed hereafter. For dated references, su
11、bsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. IS0 7500-1 Metallic materials - Verification of static uniaxial te
12、sting machines - Part 1: EN 2090 EN 2334 EN 4385 3 3.1 Tensionkompression testing machines - Verification and calibration of the force-measuring system Aerospace series -Aluminium alloy AL-P2024- - T3 - Clad sheet and strip - 0,3 mm I a I 6 mm 1) Aerospace series - Chromic-sulphuric acid pickle of a
13、luminium and aluminium alloys Aerospace series - Non-metallic materials - General organisation of standardisation - Links between types of standards 1) Def i n itions, sy m bo Is and abbreviations Definitions Not applicable 3.2 Symbols and abbreviations For the purposes of this standard, the followi
14、ng symbols and abbreviations apply: F Peeling load (in newtons); W z Peeling strength (in newtonskentimeter). Width of the specimen (in centimeter); 1) Published as AECMA Prestandard at the date of publication of this standard Page 4 prEN 2243-2: 2001 4 Health and safety This standard does not neces
15、sarily include all health and safety requirements, associated with its use. Persons using this standard shall be familiar with normal laboratoqdtest house practices. It is the responsibility of the user to establish satisfactory health and safety practices and to ensure conformity with any European,
16、 national or local laws/regulations. 5 PrinciplelTechnique 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 IS0 7500-1. The failing load of the te
17、st specimen shall be within 1 O % and 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 Ma
18、terialclReagents Not applicable 6.3 Qualification of personnel Not applicable 7 Test samplesflest pieces 7.1 Materials Aluminium alloy EN 2090 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)
19、 shall be carried out according to the material standard unless otherwise agreed with the adhesive system manufacturer. Page 5 prEN 2243-2: 2001 7.4 Dimensions of panels See figure 2. 7.5 They shall be stored under the following conditions: Storage of test panels after bonding - temperature : (2312)
20、“C; - relative humidity : (50 I 5) %. 7.6 The panels shall be cut into test pieces (see figure 2). The panels made with high temperature curing adhesives shall be cut only aller a storage period of 16 hours (see note 1). For batch acceptance testing, this 16 hours period can be omitted. Nevertheless
21、, for temperature Cutting of panels and preparation of test pieces NOTE 1 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 (I 50 “C) or mechanical damage to the joint (see note 2). NOTE 2 A fin
22、e-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. 7.7 Test pieces 7.7.1 Dimensions See figure 2. 7.7.2 Number of specimen See material standard. 7.7.3 Identification
23、 Each test piece shall be marked to identify the panel from which it was cut and its position in the panel. 8 Test i ng procedure 8.1 Dimensions measurement Measure the width W with an accuracy of k 0,l mm. Measure the thickness of the adhesive in the middle of the overlap at both sides of the test
24、piece with an accuracy off 0,Ol mm. The average 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 lowe
25、r grip of the test machine. Page 6 prEN 2243-2: 2001 8.3 Test temperatures When the test temperature is different from ambient temperature (23 12) OC, then the chamber including peeling jig shall be stabilised within the test temperature tolerance for at least 30 minutes prior inserting the test pie
26、ce. The temperature control 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,
27、 and unless otherwise specified (see note), a minimum exposure time of 10 minutes at the required temperature shall be applied prior to loading. For non-ambient temperature tests, there is a requirement for the test portion of the specimen to be NOTE within the specified temperature tolerance throug
28、hout the period of loading to failure. The exposure time of 10 minutes 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 temperaturehime records on dummy specimen(s) incorporatin
29、g thermocouple(s) embedded in 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 a
30、nd the temperature monitored according 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
31、 test shall be completed within a maximum dwell of 1 O minutes. The 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. 9 Express
32、ion of results The peeling diagram shall be evaluated 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 s
33、hown on the peeling diagram after the first maximum 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 newtonskentimeter as follows: 10 Designation EXAMP
34、LE: Description block Identity block PEEL STRENGTH EN2243-2 Number of this standard Page 7 prEN 2243-2: 2001 I1 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 tempera
35、ture; - complete identification of the adhesive system, including the type, manufacturer, 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
36、bonding conditions including the bonding method (press, autoclave, .), pressure on 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 recorde
37、r; - expression of individual results, including peel load, nature and location of failure with estimated percentage of failure in cohesion and/or adhesion in adhesive or primer; - associated diagram; - in case of multiple tests: - number of test pieces; - average, standard deviation, maximum and mi
38、nimum values of the test series. - traceability to personnel performing the test work; - any incident which may have affected the result; - any deviation from this standard described in detail; - date of test. Page 8 prEN 2243-2: 2001 Dimensions in millimetres Key 1 Roller bearing 2 Steel rollers 1
39、2 Figure 1 - Peeling jig Page 9 prEN 2243-2: 2001 Dimensions in millimetres 6 I gl 1 - i- I - m I A I i 1 Key 1 Discard Test panel Material: see EN 2090 2 3 Notbonded Widh according to number of test pieces Figure 2 - Test piece Page 10 prEN 2243-2: 2001 N 1 1 mm Key 1 Load F 2 Peeling length 3 Average value Figure 3 -Typical peeling diagram
