1、AECMA PRENxb037 95 LOL23LL 00100Dl ObT Edition approved for publication AECMA STANDARD NORME AECMA AECMA NORM Comments should be sent within six months after the date of publication to AIB/TFG Chairman prEN 6037 Edition PI November 1995 PUBLISHED BY THE EUROPEAN ASSOCIATION OF AEROSPACE INDUSTRIES (
2、AECMA) Gulledelle 94 - B-1200 BRUXELLES - Tel. (32) 2 775 81 1 O - Fax. (32) 2 775 81 11 d ICs : Descriptors : ENGLISH VERSION Aerospace series Fibre reinforced plastics Test method Determination of bearing strength Srie arospatiale Matires plastiques renforces de fibres Mthode dessai Dtermination d
3、e la rsistance au matage Luft- und Raumfahrt Faserverstrkte Kunststoffe Prfverfahren Bestimmung der Lochleibungsfestigkeit This “Aerospace Series Prestandard has been drawn up under the responsibility of AECMA (The European Association of Aerospace Industries). It is published on green paper for the
4、 needs of AECMA-Members. It has been technically approved by the experts of the concerned Technical Committee following comment by the Member countries. Subsequent to the publication of this Prestandard, the technical content shall not be changed to an extent that interchangeability is affected, phy
5、sically or functionally, without re-identification of the standard. After examination and signature of the AECMA Standard Checking Centre (NPS) and formal agreement of the Official Services of the Member countries it will be submitted as a draft European Standard to CEN (European Committee for Stand
6、ardization) for formal vote. 1995-1 1-30 AECMA Gulledelle 94 B-1200 BRUXELLES Mr K. Schneider aecma 1995 _ - COPYRIGHT Association Europeene Des Constructeurs de Materiel AerospaceLicensed by Information Handling ServicesPage 2 prEN 6037 : 1995 Contents list 1 2 3 4 5 6 7 8 9 10 Scope Normative refe
7、rences Definitions Principle of the method Designation of the method Apparatus Test specimen Procedure Presentation of the results Test report COPYRIGHT Association Europeene Des Constructeurs de Materiel AerospaceLicensed by Information Handling Services- AECMA PREN*b037 95 LOL231L 0010003 932 Page
8、 3 prEN 6037 : 1995 1 Scope This standard defines the procedure to be used to determine the bearing strength of fibre composites with multidirectional reinforcement. This standard is applicable to composite laminates manufactured from unidirectional tape or woven fabric reinforcement. This standard
9、does not give any directions necessary to meet health and safety requirements. It is the responsibility of the user of this standard to consult and establish appropriate health and safety precautions. 2 Normative references This European Standard incorporates by dated or undated reference, provision
10、s from other publications. These normative references are cited at the appropriate places in the text and the publications are listed herafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by ame
11、ndment or revision. For undated references, the latest edition of the publication referred to applies. EN 2374 Aerospace series Glass fibre reinforced mouldings and sandwich Production of test panels EN 2565 Aerospace series Preparation of carbon fibre reinforced resin panels for test purposes ) EN
12、2743 Aerospace series Reinforced plastics ) Standard atmospheres for conditioning and testing EN 2823 Aerospace series Fibre reinforced plastics Test method for the determination of the effect of exposure to humid atmosphere on physical and mechanical characteristics Parameters for conditioning and
13、testing ) 3 Definitions 3.1 Bearing stress at a given moment during the test Load experienced by the test specimen at a particular moment divided by the nominal bolt-diameter and the specimen thickness. 3.2 Yield bearing strength Bearing stress which results in a 0,02 times the diameter permanent se
14、t of the joint. 3.3 Ultimate bearing strength Bearing stress at the maximum load during the test (see figure 11. ) Published as AECMA Prestandard at the date of publication of this standard COPYRIGHT Association Europeene Des Constructeurs de Materiel AerospaceLicensed by Information Handling Servic
15、esPage 4 prEN 6037 : 1995 4 Principle of the method A tensile test is carried out on a flat laminate containing a hole; the load is applied by a bolt passing through the hole. A large specimen width is chosen, so that bearing failure occurs. The yield and ultimate bearing strengths are determined. 5
16、 Designation of the method The designation of the used method shall be drawn up according to the following example. Description block Identity block Determination of bearing strength Laminate configuration (see figure 8) Fibre reinforced plastics Number of this standard Specimen type (see figure 8)
17、6 Apparatus 6.1 Tensile testing machine, calibrated to maintain a load and displacement accuracy in tension within I %. There shall be the capability to record load-elongation diagrams. 6.2 A chamber adapted to the machine to carry out tests at a specified temperature. The chamber temperature shall be controlled to within rrD WITH UNEQUAL LEGS - Ai STRIP LENGTH DEPENDS ON CLAMPiNG STFiiP THICKNESS - Figure 10 : Test set type 2 specimen with hole COPYRIGHT Association Europeene Des Constructeurs de Materiel AerospaceLicensed by Information Handling Services
