EN 2377-1989 en Glass Fibre Reinforced Plastics Test Method Determination of Apparent Interlaminar Shear Strength《航空航天系列 玻璃纤维增强塑料 试验方法 表面层间剪切强度测定》.pdf
《EN 2377-1989 en Glass Fibre Reinforced Plastics Test Method Determination of Apparent Interlaminar Shear Strength《航空航天系列 玻璃纤维增强塑料 试验方法 表面层间剪切强度测定》.pdf》由会员分享,可在线阅读,更多相关《EN 2377-1989 en Glass Fibre Reinforced Plastics Test Method Determination of Apparent Interlaminar Shear Strength《航空航天系列 玻璃纤维增强塑料 试验方法 表面层间剪切强度测定》.pdf(11页珍藏版)》请在麦多课文档分享上搜索。
1、I- - . CEN EN*K2377 89 3qOq589 0002283 8 EUROPEAN STANDARD EN 2377 NORME EUROPENNE *EUROPISCHE NORM January 1989 UDC : 678.067.5-41 : 620.176 629.7 Key words : Aircraft industry, glass reinforced plastics, plates, test method, shear stress English version Aerospace series Glass fibre reinforced plas
2、tics Test method Determination of apparent interlaminar shear strength Srie arospatiale Plastiques renforcs de fibres de verre Mthode dessai Dtermination des proprits en cisaillement apparent interlaminaire Luft- und Raumfahrt Glasfaserverstrkte Kunststoffe Prfverfahren zur Bestimmung der scheinbare
3、n interlaminaren Scherfestigkeit This European Standard was accepted by CEN on 1 988-03-1 7. CEN members are bound to comply with the requirements of CEN Internal Regulations which stipulate the conditionsfor giving this European Standard the status of a national standard without any alteration. Up-
4、to-date lists and bibliographical referencesconcerning such national standards may be obtained on application to the CEN Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, German). Aversion in any otherlanguage made by translation und
5、er the responsibility of a CEN member into its own language and notified to LEN Central Secretariat has the same status as the official versions. CEN members are the national standards organizations of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxemburg, N
6、etherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat : Rue Brderode 2, 8-1000 Bruxelles 0 CEN 1989 Copyright reserved to all CEN members Ref. Nr EN 237
7、7 : 1989 E CEN EN*2377 89 U 3404589 0002284 T W .-. EN 2377 Page 2 BRIEF HISTORY This draft European Standard has been prepared by the European Association of Aerospace Manufacturers (AECMA). After enquiries and votes carried out in accordance with the rules of this Association, this draft has succe
8、ssively received the approval of the National Associations and the Official Services of the member countries of AECMA, prior to its presentation to CEN. In accordance with the Common CEN/CENELEC Rules, the following countries are bound to implement this European Standard: Austria, Belgium, Denmark,
9、Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxemburg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom, z -r CEN EN*:S377 89 9 3404589 0002285 I EN 2377 Page 3 Contents 1 9 L 3 4 5 6 7 8 9 10 11 Scope and field of epplication References Definition Principl
10、e of the method Test specimens Ap p ar a tu s Conditioning Procedure Test results Calculation and expression of results Test report Annex A * CEN EN*2377 87 3404587 0002286 3 m Y - 1I)GO XPa. The span shall be adjustable. 7 Conditioning The standard atmosphere shall be in accordarice with EN 62. The
11、 test specimens shall be conditioned at (23 + 2)“C and (50 + 5)Z relative humidity during at least 16 h. - - 8 Procedure Unless otherwise specified, carry out the test at (23 + 2)“C and (50 + 5)% relative humidity. - - Measure the dimensions of b and h to the nearest 0,05 mm, respectively and adjust
12、 the span to i - 5 h + 0,l mm. V Load the specimen without bumping with a rate of the loading nose of V - (1 - + 0,l) mm/min (see figure 2). The load shall be taken as a function of time or displacement of the loading nose. - Figure 2 - Testing device -r CEN EN*2377 A9 m 3904589 0002289 9 m EN 2377
13、Page 7 9 Test results 9.1 If the specimens fail in horizontal shear approximately at the neutral fibre axis (see figure 3.e), the true interlaminar shear stress shall be calculated in accordnce with the formula in clause 10. 9.2 If test specimens fail in flexural i.e. tension or compression failure
14、of the outer surface (see figure 3.b), the results calculated by the formula in clause 10 re not true shear stresses. These results shall only be used for a comparison of test series of a same material (i.e. batch control). Single shear Multiple hear Sheer and Tension Figure 3.a - Shear modes of fai
15、lure NOTE - In the case of translucent materials an off-white colour becomes evident. Tension Compression Figure 3.b - Non-shear modes of failure _I CEN EN*Z377 87 m 3404587 0002290 5 m “- EN 2377 Page 8 i0 Calculation and expression of results The apparent shear stress shall be calculated as follow
16、s : 3 F 4 b.h -I= - where : = The apparent shear stress in MPa F = Maximum force at the moment of the first failure, in N b = Width of specimen in mm h = Thickness of specimen in mm Q a . 11 Test report The test report shall include the following informations : 11.1 Number of this standard, brand, i
17、dentification mark, origin, date of receipt and further data of the tested material. 11.2 Data about the preparation of the test specimens. 11.3 Measured dimensions of the test specimens and of the span. 11.4 Actual radii of the loading nose and supports. 11.5 A graph representing the load measured
18、as a function of time or displacement. 11.6 When test specimens have been broken in shear the single values, the arithmetic mean and the standard deviation (see annex A) shall be recorded. 11.7 When test specimens have not been broken in shear a full description of type of failure shall be given wit
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