1、AECMA STANDARD NORME AECMA AECMA NORM prEN 2243-5 Edition P 1 December 2001 PUBLISHED BY THE EUROPEAN ASSOCIATION OF AEROSPACE INDUSTRIES - STANDARDIZATION (AECMA-STAN) Gulledelle 94 - 8-1200 BRUXELLES - Tel. (+32) 2 775 81 10 - Fax. (+32) 2 775 81 11 ICs: ENGLISH VERSION Aerospace series Non-metall
2、ic materials Structural adhesives Test method Part 5: Ageing tests Will supersede EN 2243-5: 1992 Srie arospatiale Matriaux non-mtalliques Systme dadhsifs structuraux Mthodes dessai Partie 5 : Essais de vieillissement Luft- und Raumfahrt Nichtmetallische Werkstoffe Strukturelle Klebstoffsysteme P rf
3、ve rfa h ren Teil 5: Alterungsversuche 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 Industry. It has been techn
4、ically 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-identification of the standard. Afi
5、er 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. L Nota - Extra copies can be supplied by B.N.A.E. - Technopolis 54 - 199. rue Jean-Jacques Rousseau - 92138 ISSY-LE
6、S-MOULINEAUX CEDEX Edition approved for publication Comments should be sent within six months after the date of publication to 2001-12-28 AECMA-STAN Gulledelle 94 B-1200 BRUXELLES I I Material Domain Mr Pays 0 aecma 20( Page 2 prEN 2243-5: 2001 Contents Page O 1 2 3 3.1 3.2 4 5 6 6.1 6.2 6.3 7 7.1 7
7、.2 7.3 7.4 7.5 7.6 7.7 8 8.1 8.2 8.3 9 9.1 9.2 9.3 IO I1 . . Introduction . Scope Normative references . . Definitions, symbols and abbreviations Definitions . Symbols and abbreviations Health and safety . Apparatus Test samplesfest pieces . Surface preparation before bonding . Dimensions of panels
8、. Storage of test panels after bonding . Test pieces . . Materials . . . . Cleaning Destructive testing . . Expression of results . Peel test - metallmetal . . Test report . 3 3 3 3 3 3 4 4 4 4 4 4 4 4 5 5 5 5 5 5 6 6 7 7 7 7 7 8 9 9 Page 3 prEN 2243-5: 2001 O Introduction This standard is part of t
9、he 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 level 3 document as defined in EN 4385. 1 Scope This standard defines the general requirements for the determination of resistance of struct
10、ural adhesives and adhesive bonded joints against environmental influences. 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 ar
11、e listed hereafter. For dated references, subsequent 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 3768 EN 2243-1 EN
12、2243-2 EN 2243-6 Metallic coatings - Neutral salt spray test (NSS test) Structural adhesives - Test methods - Part 1 - Single lap shear - Aerospace series 1) Aerospace series - Non-metallic materials- Structural adhesives - Test method - Part 2: Peel metal-metal 2) Aerospace series - Non-metallic ma
13、terials- Structural adhesives - Test method - Part 6: EN 2379 EN 2743 EN 4385 3 3.1 Determination of shear stress and shear strain 2) Aerospace series - Fluids for assessment of non-metallic materials 2) Aerospace series - Reinforced plastics - Standard procedures for conditioning prior to testing 2
14、) Aerospace series - Non-metallic materials - General organisation of standardisation - Links between types of standards 2) Definitions, symbols and abbreviations Defi nit ions Not applicable 3.2 Symbols and abbreviations For the purposes of this standard, the following symbols and abbreviations app
15、ly: z average shear stress; F average peel strength; G, average elastic shear modulus; A Bond line area; RZ, RF Reduction percentage in shear strength; RG Reduction percentage in shear modulus; A, Percentage attacked area. I) Published as AECMA Standard at the date of publication of this standard 2)
16、 Published as AECMA Prestandard at the date of publication of this standard Page 4 prEN 2243-5: 2001 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 h
17、ouse 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 Princip IelTec h n i q u e Not applicable 6 Resources 6.1 Apparatus Ali test equipment shall be calibrated at i
18、ntervals not exceeding 12 months. 6.1.1 Humidity cabinet For relative humidity test exposures, a humidity cabinet is required in which the exposure zone can be maintained at (50 f 3) “C or (70 f 3) “C and a minimum of 95 % relative humidity. It shall be possible to record the temperature continuousl
19、y. To obtain and to maintain the humidity, only freshly distilled water shall be used. Airflow is allowed. 6.1.2 Saltspray cabinet A saltspray cabinet is required, in accordance with IS0 3768. 6.1.3 Fluid containers For fluid immersion tests, containers are required of sufficient size, capable of ma
20、intaining a fluid temperature within the required range (see table I), independent of the location of the test panel in the fluid. It shall be possible to record the temperature continuously. 6.2 Materials/Reagents Test fluids in accordance with EN 2379 (see table 1). 6.3 Qualification of personnel
21、Not applicable 7 Test samples/Test pieces 7.1 Materials According to the relevant test method (see table 1). Page 5 prEN 2243-5: 2001 7.2 Surface preparation before bonding According to the relevant test method (see table 1). 7.3 Bonding According to the relevant test method (see table 1). 7.4 Dimen
22、sions of panels According to the relevant test method (see table 1). 7.5 They shall be stored under the following conditions: Storage of test panels after bonding - temperature : (2312)“C; - relative humidity : (50 f 5) %. 7.6 According to the relevant test method (see table 1). Cutting of panels an
23、d preparation of test pieces NOTE pieces. For salt spray testing, the test panels shall be protected against corrosion before cutting to test 7.7 Test pieces 7.7.1 Dimensions According to the relevant test method (see table 1). 7.7.2 Number of specimens According to the relevant test method (see tab
24、le 1). From each test panel, a minimum of two test pieces shall be used as reference test pieces (see 9). 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. Page 6 prEN 2243-5: 2001 Environment Relative humidity 95 %to 100%
25、 Relative humidity 95% to 100 % 8 Test i ng procedure Relative humidity 95 %to 100 % 8.1 Ageing See table 1. Anti-icing fluid EN 2379 (XIV) Hydraulic fluid 1 EN 2379 (XII) Table I 50I3 60 A22 90 A23 30 A3 1 Relative humidity 95 % to 100 % Relative humidity 95 % to 100 % Relative humidity 95 %to 100
26、% Salt spray IS0 3768 Phosphorester oils EN 2379 (XX) Test fuel EN 2379 (XXI) Standard test fuel EN 2379 (XXII) Phosphorester oils EN 2379 (XX) Test fuel EN 2379 (%I) I Standard test fuel EN 2379 (XXII) I Anti-icing fluid EN 2379 (XIV) Hydraulic fluid t EN 2379 (XII) Temperature Time 1 Code I Clause
27、 (OC) ref. A13 30 A2 1 8.1.1 70i3 BI2 30 BI3 823 10 831 40*2 G2 G3 15 HI Type of test EN 2243-1 EN 2243-2 EN 2243-6 EN 2243-1 EN 2243-2 EN 2243-6 EN 2243-2 EN 2243-1 EN 2243-6 Page 7 prEN 2243-5: 2001 8.1.1 The exposure shall be continuous. Any interruption shall be recorded. The test pieces shall b
28、e suspended in the exposure area in such a way that the minimum distance betwe each other and the sides of the humidity cabinet is 25 mm. The test pieces shall be arranged so that condensate from one test piece does not drip on another. Relative humidity (exposure at 50 OC or 70 OC) n 8.1.2 Salt spr
29、ay See IS0 3768 - except that the test pieces shall be suspended in such a way that the minimum distance between each other and the side of the cabinet is 25 mm. 8.1.3 Fluids The test piece shall be exposed in the test fluid in such a way that the joints are completely immersed. The position of the
30、test piece is not critical, provided the minimum distance of the joints between each other and the sides and bottom of the container is 10 mm. The exposure time shall be estimated from the time the test fluid has reached the test temperature specified in the table 1. Each test shall start with fresh
31、 fluid that shall not be changed during the test. 8.2 Cleaning Immediately after exposure, the test pieces shall be cleaned with water (maximum temperature 35 OC) and dried with clean dry cloths. 8.3 Destructive testing Destructive testing shall be carried out according to the relevant test method s
32、tandard (and after 24 h, but within 30 h, after removal from the exposure). Conditioning during this period of time shall take place at standard atmosphere according to EN 2743. Reference test pieces shall be destructively tested within three days or the final cure. 9 Expression of results 9.1 Singl
33、e lap shear tests The shear strength per test piece is to be carried out according to EN 2243-1. The reduction percentage RT of the aged test pieces compared with the reference test pieces shall be calculated as follows: R, = (z, - T)/T, .IO0 % where: Average shear strength of all reference test pie
34、ces; Average shear strength of all aged test pieces. 71 T2 9.2 Peel test - metallmetal 9.2.1 The peel strength per test piece is to be carried out according to EN 2243-2. Calculation of reduction in peel strength Page 8 prEN 2243-5: 2001 The reduction percentage RF of the aged test pieces compared w
35、ith the reference test pieces shall be calculated as follows: RF = (Fi - F2)lFi.l O0 % where : F1 Fi Average shear strength of all reference test pieces; Average shear strength of all aged test pieces. 9.2.2 Calculation of attacked area Remove the thin peel sheet by peeling the remaining portion of
36、the test piece by hand or other means. Judge the adhesive faced side of the thick (1,6 rnm) adherent without any removal of adhesive as follows: - All areas where the thick adherent only has been corroded are clearly shown as the adhesive has been removed by the thin adherent. - All areas where the
37、thin adherent only, or both thin and thick adherents have been attacked are recognised by corrosion residues on the adhesive surface or by a sudden change in type of failure. Establish in crnz the bond line area that has been changed by corrosion and/or hydration of the metal su rfa ce. Establishing
38、 of the attacked area A, can be done with the aid of transparent graph paper. Calculate the percentage of attacked area as follows: A, = A1/A2.100% where: Al A2 Total area of attacked surface; Total area of bonded joint. 9.3 Shear stress and shear strain tests 9.3.1 The shear strength per test piece
39、 is to be carried out according to EN 2243-6. The reduction percentage RT of the aged test pieces compared with the reference test pieces shall be calculated as follows: Calculation of reduction in shear stress RZ = (T - T)/T,. 100 % where: T z, Average shear strength of all reference test pieces; A
40、verage shear strength of all aged test pieces. 9.3.2 The elastic shear modulus per test piece is to be carried out according to EN 2243-6. The reduction percentage RG of the aged test pieces compared with the reference test pieces shall be calculated as follows: Calculation of reduction in elastic s
41、hear modulus RG = (Gei - GeZ)/Gel. 100 % where : Ge1 Ge2 Average elastic shear modulus of all reference test pieces; I Average elastic shear modulus of all aged test pieces. 10 Designation EXAMPLE: Description block AGEING TEST Page 9 prEN 2243-5: 2001 Identity block “0“T i Number of this standard C
42、ode for ageing (see table 1) 11 Test report The test report shall include: - reference to the test method designation and ageing code; - any information relevant to the test(s) method(s); - complete identification of the adhesive system, including the type, manufacturer, date of manufacture, batch n
43、umber, 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 the adhesive joint, heat-up rate, c
44、uring time and temperature: - information about individual test piece including traceability from panel; - expression of individual results; - 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 work; - any incident which may have affected the result; - any deviation from this standard described in detail; - date of test.
