EN 2374-1991 en Glass Fibre Reinforced Mouldings and Sandwich Composites - Production of Test Panels《航空航天系列 玻璃纤维加强的压制件和夹层复合件 试验板的生产》.pdf
《EN 2374-1991 en Glass Fibre Reinforced Mouldings and Sandwich Composites - Production of Test Panels《航空航天系列 玻璃纤维加强的压制件和夹层复合件 试验板的生产》.pdf》由会员分享,可在线阅读,更多相关《EN 2374-1991 en Glass Fibre Reinforced Mouldings and Sandwich Composites - Production of Test Panels《航空航天系列 玻璃纤维加强的压制件和夹层复合件 试验板的生产》.pdf(16页珍藏版)》请在麦多课文档分享上搜索。
1、L - EUROPEAN STANDARD EN 2374 NORME EUROPEENNE EUROPAISCHE NORM April 1991 UDC: 678 067.5-41:620; 629.7 Descriptors: Aircraft industry, composite materials, reinforcing materials, laminates, laminated plates, glass cloth, manufacturing, characteristics, verification b English version Aerospace serie
2、s - Glass fibre reinforced mouldings and sandwich composites - Production of test panels Srie arospatiale - Matriaux Luft-und Raumfahrt - stratifies renforcs de fibres de verre Glasfaserverstarkte Formstoffe und et matriaux composites sandwich - Kernverbunde - Herstellen von Prparation des panneaux
3、dessais Prfplatten This European Standard nas approved by CEN on 1991-03-28 CEN members are bound to comply with the CENICENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and biblio
4、graphical references concerning such national standards 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 translation under the responsibility of
5、a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, FPance, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, S
6、pain, Sweden, Switzerland and United Kingdom. CEN European Committee :for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, 8-1050 Brussels (cl CEN $991 Copyright reserved to all CEN members t7cf. No. EN 2?174:1991 E CEN EN*E374 L
7、m 3404589 OOL4OLO O Page 2 EN 2374:1991 Contents list 1 2 References Scope and field of application 3 Type of fabrication 4 Equipment and apparatus 5 Tooling 6 7 8 Fabrication of laminate test panels Fabrication of sandwich composite test panels Fabrication of test panels for establishing the adhesi
8、ve properties 9 Sampling 10 Test report Foreword 3 3 3 4 4 6 13 15 16 16 This European Standard has been prepared by the European Association of Aerospace Manufacturers ( AEC MA). After inquiries and votm carried o-ut in accordance with the rules of this Association, this Standard has successively r
9、eceived the approval of the National Associations and the Official Services of the member countries of AECMA, prior to its presentation to CEN. According to the Common CEN/CENELEC Rules, the following countries are bound to implement this European Standard : Austria, Belgium, Denmark, Finland, Franc
10、e, Germany, Greece, Iceland, Ireland, Italy, Luxemburg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. Page 3 EN 2374:1991 I This standard describes the production of laminate and sandwich composite test panels from glass fibre fabric and resin mixes. Test specimens, w
11、hich are specified for the determination of the characteristics of the glass fibre reinforced mouldings, for the verification of the properties of their components or for the verification of the adhesive and sandwich composite properties, are taken from the test panel in accordance with the relevant
12、 test standard. This standard is not applicable to the production of test panels from unidirectional glass fibre fabric and resin mixes, Scope and field of applicafion 2 References EN 2090 EN 2334 EN 2514 EN 2743 Aerospace series - Aluminium alloy 2024-T3 - Clad sheets and strips - 0,4- a G 6 mm 1)
13、Aerospace series - Pickling of aluminium alloys in chromic acid 2) Aerospace series -Aluminium alloy 5052-H191 - Honeycomb core 2) Aerospace series - Glass reinforced plastics - Standard atmospheres for conditioning and testing 2). 3 Type of fabrication 3.1 TypeA Glass fibre fabric is impregnated wi
14、th liquid resin mix and made into test panels in a press mould under the influence of pressure and temperature in accordance with the resin manufacturers processing instructions. 3.2 Type B Preimpregnated glass fibre fabric (prepreg) is made into test panels under the influence of pressure and tempe
15、rature in accordance with the manufacturers processing instructions. 3.3 TypeC Glass fibre fabric is impregnated with liquid resin mix and made into test panels at room or elevated temperature without application of pressure in accordance with the resin manufacturers processing instructions. 1) Publ
16、ished as AECMA standard at the date of publication of the present standard. 2) In preparation at the date of publication of the present standard. F 7 p_p- - 1 Page 4 EN 2374:1991 4 Equipment and apparatus For types A and B, a hydraulic or mechanical press, an autoclave or equipment for vacuum bag fa
17、brication is required. The equipment shall be fitted with a continuously variable temperature and pressure control, which allows the prescribed values to be kept constant over the entire cure time. Provided there are no other agreements with the material supplier, the equipment shall be suitable for
18、 maintaining the temperature with an accuracyof i 50C and the press pressure with an accuracyof f 5 %. When a press is used, it shall be ensured that the press mould described in clause 5 can be accommodated and that the closure rate for the last two millimetres of the closure travel does not exceed
19、 5 mm/min. The equipment shall be fitted with suitable measuring devices for monitoring the fabrication parameters temperature, time and pressure. In autoclave or vacuum bag fabrication, a vacuum indicator shall also be available. In vacuum bag fabrication, it shall be ensured that the vacuum pump c
20、an maintain a reduced pressure of at least 70 kPa in the bag during the entire cure time, Provided there are no different agreements with the material supplier, the production of the test panels is to be carried out in a light, well ventilated room at 15 OC to 30 OC and a relative humidity of 30 % t
21、o 75 %. 5 Tooling 5.1 Press moulds Press moulds according to figures and 2 are usedfor the production of test panels in a press. The choice of the press mould is to be made according to the material to be processed and the purpose of the test. The press moulds shall satisfy the following requirement
22、s : a) length and breadth of the pressing areas of the press mould shall be large enough to allow the manufacture of test panels from 150 mm X 150 mm to 400 mm X 400 mm. b) the moulding surfaces (surfaces designed for shaping the test paneis) of the press mould should be hardened, polished and, if p
23、ossible, hard chromium plated. c) the lower moulding surface shall have a mark, which is reproduced on the test panel on pressing, in order to make the lower side of the test panel identifiable after the pressing procedure. The mark on the test panel shall not have a deleterious effect on the subseq
24、uent tests (see first note page 6). d) the temperature over the entire moulding surface of the press mould shall not deviate locally by more than zk 3 OC from the specified value e.g. measured by means of a thermocouple. 7 - i CEN EN*Z374 71 I- 3404587 0014013 b Page 5 EN 2374:1991 - e) the press mo
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