1、AECMA STANDARD prEN 4504 NORME AECMA Edition P 1 AECMA NORM November 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 Edition approved for publication ICs: Descriptors:
2、 Comments should be sent within six months after the date of oublication to Material Domain ENGLISH VERSION Aerospace series Non-metallic materials Text i I es Test method Determination of flexibility of narrow fabrics Srie arospatiale Matriaux non-mtalliques Textiles Mthode dessai Dtermination de l
3、a flexibilit des tissus troits Luft- und Raumfahrt Nichtmetallische Werkstoffe Textilien Prfverfahren Bestimmung der Flexibilitat von Schmalgeweben This “Aerospace Series“ Prestandard has been drawn up under the responsibility of AECMA-STAN (The European Association of Aerospace Industries - Standar
4、dization). It is published on green paper for the needs of the European Aerospace 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 th
5、at interchangeability is affected, physically or functionally, without re-identification 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. 2001-1
6、1-30 AECMA-STAN Gulledelle 94 6-1200 BRUXELLES Mr Pays 0 aecma 20C Page 2 prEN 4504: 2001 Contents O 1 2 3 4 5 6 7 8 9 10 II 12 Normative references . . Health and safety . PrinciplelTechnique RecourceslFacilities . . Test samples/Tect pieces . Test procedure . Expression of res Measurement uncertai
7、nties Designation Test report . . Page 3 3 3 3 3 3 4 4 4 5 5 5 5 Page 3 prEN 4504: 2001 O Introduction This standard is part of the series of EN non-metallic materials for aerospace applications. The general organisation of this series is described in EN 4385. This standard is a level 3 document as
8、defined in EN 4385. I Scope This standard defines the requirements for the determination of the flexibility of narrow fabrics. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the app
9、ropriate places in the next and the publications are 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 publ
10、ication referred to applies. EN 4385 ,. Aerospace series - Non-metallic materials - General organisation of standardisation - Links between types of standards 1) EN 20139 Textiles - Standard atmospheres for conditioning and testing 3 Terms and definitions For the purposes of this standard, the follo
11、wing terms and definitions apply. 3.1 flexibility the degree of pliancy exhibited by a fabric (as indicated in the diagram at Figure I) 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 fami
12、liar with normal laboratoryltest house practices. It is the responsibility of the user to establish satisfactory health, safety and environment practices and to ensure conformity with any European, National or local lawslregulations. 5 P ri n ci ple/Tec h n iq u e The test consists in measuring the
13、flexibility of a narrow woven fabric on a block of wood or similar suitable material. 1) Published as AECMA Prestandard at the date of publication of this standard Page 4 prEN 4504: 2001 6 ResourceslFacilities 6.1 Apparatus 6.1.1 A block, having a smooth upper horizontal plane face and an inclined p
14、lane length joining it at an angle of (138 I I)“ as shown in Figure I. The width of the block should be wide enough to fully support the sample under test. The upper surface should have a minimum length of 200 mm and the inclined plane should have a NOTE minimum length of 400 mm. 6.1.2 individual te
15、xtile specification and of suitable width Two plate glass sheets of dimensions at least twice the maximum bending length specified in the 6.1.3 specimen. Ruler or suitably sized block of wood, the underside of which is sufficiently rough to grip 6.2 MaterialslReagents No requirements 6.3 Qualificati
16、on of personnel No specific technical requirements 7 Test SampleslTest pieces 7.1 Cut five specimens each approximately twice the maximum bending length specified in the individual textile specification and of full width from the test sample ensuring cut is perpendicular to the longitudinal directio
17、n. Mark each sample on its face side. 7.2 (20 I 2) “C in accordance with EN 20139 - Standard Temperate Atmosphere For Testing. The samples are conditioned and tested in a standard atmosphere of (65 f 2) % r.h. and 8 Test procedure 8.1 Conduct the test within the Standard Temperate Atmosphere For Tes
18、ting (65 f 2) % r.h. and (20 f 2) OC. 8.2 Place the specimen between two plate glass sheets for at least 2 hours and then remove. 8.3 Lay the specimen on the horizontal surface terminated at one end by a straight edge so that the length of the specimen is at right angles to, and one end is level wit
19、h, that edge. Place a ruler or suitable block of wood on top resting against the fabric guide and with its edge level with the edge of the sample, the underside of which is sufficiently rough to grip the specimen. NOTE 1 In order to achieve a better grip on the specimen adhesive, double sided adhesi
20、ve tape or fine emery paper may be applied to the rule or block of wood to aid grip on sample. NOTE 2 The O mm mark of the ruler should coincide with the edge of the specimen at the change of slope. Page 5 prEN 4504: 2001 8.4 the end of the sample touches the inclined plane when bending. Move the sp
21、ecimen lengthwise over the edge at a uniform rate of approximately 25 mm/5 s until 8.5 Record the length of fabric protruding beyond the edge as shown in Figure 1. 8.6 Make a similar determination with the other face of the same end of the specimen uppermost. 8.7 Test the other four specimens as des
22、cribed in 8.1 to 8.5. 9 Expression of results 9.1 9.2 Calculate the mean of the five results obtained. Record the highest and lowest individual result. IO Measurement uncertainties Not applicable 11 Designation Not applicable 12 Test report The report shall include the following information: a) b) c
23、) Reference to this European Standard, .e. EN 4504; Identification of sample tested (.e. lot number, batch number); Individual sample measurements and the mean of the five sample measurements with the face uppermost, individual sample measurements and the mean of the five sample measurements reverse uppermost; Traceability to the individual who performed the test; d) e) Date of test; 9 Details of any deviation from this test method. Page 6 prEN 4504: 2001
