1、AECMA PREN2557 BB W 1012311 000369 1 Edition approved for publication 17th October 1988 A. E. C. M .A. STAN DARD NORME A.E.C.M.A. A.E.C.M.A. NORM Comments should be sent within six months C7 Chairman after the date of publication decision A.E.C.M.A. 88, Bd. Malesherbes Mr. BEZAUD 75008 PARIS - FRANC
2、E prEN 2557 Issue P 1 October 1988 DIT PAR LASSOCIATION EUROPENNE DES CONSTRUCTEURS DE MATERIEL AROSPATIAL 88, boulevard Malesherbes, 75008 PARIS - TEL. 45-63-82-85 UDC : Key words : ENGLISH VERSION Aerospace series Carbon fibre preimpregnates Test method for the determination of mass per unit area
3、Srie arospatiale Primprgns de fibres de carbone Mthode dessai pour la dtermination de la masse surfacique Luft- und Raumfahrt Kohlenstoffaser- Prepreg Prfmethode zur Bestimmung der flachenbezogenen Masse This Aerospace Series pre-standard has been drawn up under the responsibility of AECMA (Associat
4、ion Europenne des Constructeurs de MatrielArospatial). It is published on green paper for the needs of AECMA-Members. It has area after conditioning in a specified atmosphere. 5 Apparatus 5, I 5.2 Template or standard specimer, 5.3 CalaIice with an accuracy of O, 1 mg hicillary items such as sharp c
5、utting knife and tweezers. 6 6.1 Conditioning 6.1.1 Conditioning of maiscrial stored at ambient temperature Por material stored at mbient: temperature, the amount of materisi?. required for testing shall be sampled zind conditioned in the stndard tescing atmosphere (see clause 6.2.1) for a minimum o
6、f 2 h, unless otherwlse specified. Standard atmosphere for conditioning and testing 1) In preparaton Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-AECM
7、A PREN2557 88 10123LL 0003q72 1 prEN 2557 Page 4 6.1.2 Conditioning of material stored below ambient tempercture For material stored at temperatures lower thm ambieiit temperature, the inaterial, suitably paclced ln an airtight and solveit resistant bag to prevent misture pick-up, shall- be allowed
8、to reach ambleiit temperature over a period of cime according to the inass of Che pzckage, This time shall riot be less than 8 li ;Ind the actual tine shall be recorded in the report. When the material has reacliecl ambient temperarura the amount equired for testing cEal be sainpled and ccnditioned
9、in the standard testing atmosphere (see clause 6.2.1) for a minimuiu of 2 h, unless otherwise speciffkc!. 6.2 Testing 6.2.1 Standard atmosphere Por testing The teste shall be carried out at (23 f 2) “C ar,d (50 + 5) X relutive humidity. The standard atmosphere shall be in accordar,ce with EN 2743. 6
10、.2.2 Time iiitervl between conditioning and testing After conditoring, the test shall be carried out %thin 6 h, unless otherwise specifid, Che speci.nera being kept In the standard atmosphere until the test is carried out. 7 Sampling acc? test specimens 7.1. Test specimen The specimen shall be squar
11、e and Iiav 1100 - -i- 1) mm. a length of (100 - 4- 1) mm nd a width of Other dlxneiisi.or;s of the test specimen may be used, subject to agreement between the purchaser and the supplier, 3ut havhg an area of 100 cm2 with aii accuracy of i- 2%. - 7.2 Number aiid distrlbiition of test specimens A mini
12、mum of 3 test specimens skiai1 be used. These shall be evenlj, dlctributed and cut rom the smpl-e diagonally across the width or lecgth, as shown in figures la arad 1B for woven fabrics and in igure 2 for unidirectional sheet or tape. 8 Procedure Cut the specimens from a representative sample of the
13、 material under test, using the appropriate tenplate. Weigh each specimen with its separating lilm(s) to the nearest mg (n 1. 1 Remove the separating film(s1 and reweigh this to the nearest ng (rn2). Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under lice
14、nse with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-AECMA PREN2557 88 1012311 0003473 3-= prEN 2557 Page 5 9 Calculation and expression of results The mass per square metre of each test specimen is calculated from the formula : m = (mi - m2) x 100 where : m
15、 ml m is the mass of the separating film(s), in g. 2 Calculate the arithmetic mean of the values obtained for m, to the nearest g/m“. is the mass per unit area, in g/m2, is the mass of the specimen plus separating film(s), in g, 10 Test report The test report shall include the following information
16、: 10.1 Reference to the type of preimpregnate, with complete description including prepreg batch number 10.2 Keference to this test method 10.3 Description of the sampling method 10.4 Number of test specimens used, if different from this standard 10.5 Dimensions of the test specimens, if different f
17、rom this standard 10.6 Standard atmosphere used for conditioning and testing and actual time used for conditioning 10.7 The arithmetic mean value of the mass per square metre 10.8 The individual values 10.9 Observations on any circumstances liable to influence the results. 8 0619XSP1287T5 Copyright
18、Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-1: U .r( Il “ aJ L T3 .e J) c L m x c O ir( U u al L er( U rn c L m 2 L- AECMA PREN2557 8 U L0123Ll 0003474 5 prEN
19、2557 Page 6 Dimensions in millimetres I I 50 I - * Wavp yarris tiirection I b Width 1 Figure 1 A - Example of diagonal positioning of test specimens on woven textile carbon fabric sample across the width Dimensions in millimetres ! I I I I I 1 (* sd -* I k Warp yarns directiun Width c t b c Figure 1
20、 B - Example of diagonal positioning of test specimens on woven textile carbon fabric sample along ar: axis inclined at an angle as close as possible to the weft direction 0619XSP1287T5 t- Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AE
21、CMANot for ResaleNo reproduction or networking permitted without license from IHS-,-1 UIJ -e- ;. 1 I gi 1 I I f i I t .I I I * I I - AECMA PREN2557 88 I.1011j!3111pp000345 7 prEN 2557 Page 7 Dimensions in millimetres Figure 2 - Example of diagonal positioning of test specimens on unidirectional sheet or continuous tape sample 1 0619XSP1287T5 I- Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-
