1、AECMA PREN*b044-1 95 10123L1 OOltO19Lt 961 AECMA STANDARD NORME AECMA AECMA NORM prEN 6044-1 Edition PI December 1995 PUBLISHED BY THE EUROPEAN ASSOCIATION OF AEROSPACE INDUSTRIES (AECMA) Gulledelle 94 - B-1200 BRUXELLES - Tel. (32) 2 775 81 10 - Fax. (32) 2 775 81 11 ICs : Descriptors : ENGLISH VER
2、SION Aerospace series Carbon fibre reinforced epoxy prepreg Technical specification Part 1 : General requirements Srie arospatiale Primprgn carbone poxy Spcification technique Partie 1 : Exigences gnrales Luft- und Raumfahrt Kohlenstoffaserverstrktes Epoxidharz - Prepreg Technische Lieferbedingungen
3、 Teil 1 : Allgemeine Anforderungen This “Aerospace Series I Prestandard has been drawn up under the responsibility of AECMA (The European Association of Aerospace Industries). It is published on green paper for the needs of AECMA-Members. It has been technically approved by the experts of the concer
4、ned 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, physically or functionally, without re-identification of the standard. After examination
5、and signature of the AECMA Standard Checking Centre (NPSI 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 Standardization) for formal vote. Nota - Extra copies can be supplied by B.N.A.E. - Technop
6、olis 54 - 199, rue Jean-Jacques Rousseau - 921 38 ISSY-LES-MOULINEAUX CEDEX I Comments should be sent within six months after the date of publication to I Edition approved for publication 1995-1 2-1 5 AECMA Gulledelle 94 B-1200 BRUXELLES I aecma 1995 AIBITFG Chairman Mr K. Schneider AECIA PRENmb044-
7、L 95 LOL23LL OOLOL9S BTB Page 2 prEN 6044-1 : 1995 Contents list 1 Scope 2 Normative references 3 Definitions 4 Requirements 5 Qualification 6 Release testing 7 Preparation for delivery AECMA PREN*b044-1 95 W 1012311 001019b 734 Page 3 prEN 6044-1 : 1995 1 Scope This specification presented in sever
8、al parts covers the requirements for carbon fibre materials preimpregnated with epoxy or modified epoxy resin for manufacturing primary and secondary airframe and aerospace structures. Part 1 is the basic technical specification, while part 2 and following parts give specific information about the q
9、ualification programs related to relevant material specifications. This specification relates to unidirectional tapes and woven fabrics. Three dimensional woven forms or chopped strand non-woven mats are not covered. 2 Normative references This European Standard incorporates by dated or undated refe
10、rence provisions from other publications. These normative references are cited at the appropriate places in the text 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 incorpora
11、ted in it by amendment or revision. For undated references the latest edition of the publication referred to applies. EN 2000 Aerospace series Quality assurance EN aerospace products ) EN 2561 Aerospace series Unidirectional laminates carbon thermosetting resin Tensile test parallel to the fibre dir
12、ection ) EN 2562 Aerospace series Unidirectional laminates carbon thermosetting resin Flexural test I EN 2563 EN 2565 EN 2597 EN 2743 EN 2823 EN 2850 EN 3042 Aerospace series Unidirectional laminates carbon thermosetting resin Determination of interlaminar shear strength Aerospace series Preparation
13、 of carbon fibre reinforced resin panels for test purposes ) Aerospace series Carbon thermosetting resin unidirectional laminates Tensile test perpendicular to the fibre direction I Aerospace series Standard procedure for conditioning prior to testing I Aerospace series Fibre reinforced plastic Test
14、 method for the determination of the effect of exposure to humid atmospheres on physical and mechanical characteristics ) Aerospace series Fibre reinforced plastics Testing unidirectional laminates and woven fabric laminates Compression test I Aerospace series Quality assurance EN products Qualifica
15、tion orocedure ) Page 4 prEN 6044-1 : 1995 , EN 3615 Aerospace series Fibre reinforced plastics Procedure for the determination of the conditions of exposure to humid atmosphere and the determination of moisture absorption ) EN 6032 EN 6033 EN 6039 EN 6040 EN 6041 EN 6042 EN 6043 Aerospace series Fi
16、bre reinforced plastics Determination of the glass transition temperatures ” Aerospace series Carbon fibre reinforced plastics Determination of interlaminar fracture toughness energy - Mode I - GI, I Aerospace series Fibre reinforced plastics Determination of the exothermic reaction during curing of
17、 prepreg materials ) Aerospace series Non metallic materials Analysis of thermoset systems by high performance liquid chromatography ) - Aerospace series Non metallic materials Analysis of non metallic materials (uncured) by differential scanning calorimetry I Aerospace series Non metallic materials
18、 Analysis of organic compounds by infrared spectroscopy ) Aerospace series Fibre reinforced plastics Determination of viscosity and gel time of matrix resins ) 3 Definitions 3.1 General 3.1.1 Woven fabric Carbon filament yarns woven into a fabric of any two-dimensional weave pattern. Warp and weft t
19、racer yarns of another material may be incorporated into the fabric when agreed (see 3.2.2). 3.1.2 Unidirectional sheet and tape (UD prepreg) A planar array of parallel carbon fibre filament yarns. When required stabilising fibres of another material (e.g. aramid fibre) may be stitched at intervals
20、into the array at 90 to the yarn orientation. 3.1.3 Preimpregnate (Prepreg) Woven fabric or unidirectional sheethape impregnated with a matrix resin and suitably processed e.g. B-staged) for storage, handling purposes and curing by heat and pressure without further additives. I Published as AECMA Pr
21、estandard at the date of publication of this standard AECMA PRENxb044-L 75 LOL23LL OOLOLSB 507 = Page 5 prEN 6044-1 : 1995 3.1.4 Material specification MSI The material specification lists all data describing the performance of the material group. It gives the requirements, limits and test methods f
22、or the qualification of a certain product group. This performance level is directly related to the design allowables of that group. 3.1.5 Individual product specification IPS The individual product specification gives the complete information about a certain product of one prepreg manufacturer and i
23、ts performance. Each single product has a separate specification. The individual performance and the acceptance values of the product for release testing are listed including the requirements for physico-chemical testing. 3.1.6 Qualification Proof that the prepreg producer and the prepreg supplied m
24、eet the requirements as laid down in this specification and the relevant material specification. The proof is given by the qualification testing. 3.1.7 Qualification testing Qualification testing is performed on representative production quantities of a specific type or material from a particular ma
25、nufacturing source to determine whether the material will meet the full requirements of this specification and the relevant material specification. These results are also used to establish the individual product specification. 3.1.8 Side qualification Side qualification is a reduced qualification pr
26、ogram resulting from minor changes in the original qualified material. 3.1.9 Compatibility Compatibility means that in Co-curing processes the performance of each material shall not be affected by the other materials (e.g. specified adhesive films, core splice, potting compound etc.). The Co-cured m
27、aterials shall be fully cured in one cure cycle. 3. I. 1 O Release testing / supplier quality control testing Release testing is that performed by the manufacturer on each production batch of material to ensure that the material supplied is of the same type, form, and quality as that supplied for th
28、e qualification tests. 3.1.1 1 Acceptance testing Testing performed by the purchaser on each production batch of products to ensure that the product supplied is of the same type, form, and quality as that supplied for the qualification tests. - AECMA PRENab044-L 95 = LOL23LL OOLOL99 443 m Page 6 prE
29、N 6044-1 : 1995 3.2 Specific 3.2.1 Resin batch A quantity of homogeneous resin prepared, to its final ready-for-impregnation form, (composed from neat resin and constituents (see 5.3.5.2) in one operation with traceability to individual component batches as described in relevant production specifica
30、tions of the prepreg manufacturer. 3.2.2 Woven fabric batch A quantity of fabric of a certain weaving style produced on a specific loom type in accordance with relevant production specifications of the weaver giving full traceability. The production run of the batch shall not be interrupted by a run
31、 of a different material. One batch of fabric may contain a maximum of three batches of carbon filament yarns in warp direction and only one batch in weft direction (case 3:l) or one batch in warp and up to the three batches in weft (case 1 :3). In case of 1 :3 the additional requirement of the samp
32、ling plan (see 6.8.1) has to be fulfilled. Tracer yarns may be incorporated (material: preferably glass). The use shall be agreed between supplier and purchaser. The qualification batches shall contain tracer yarns. The pattern of the tracers shall consist of yarn incorporated every 150 mm along the
33、 fabric length (warp direction) and every 50 mm across the web (weft direction). Qualified fabrics produced without tracer yarns do not need requalification. 3.2.3 Preimpregnate batch (prepreg batch) Preimpregnate containing in the case of uni-directional sheet or tape not more than three batches of
34、 carbon yarn all from the same supplier, impregnated with one batch of resin in one continuous operation In case of preimpregnated fabric a batch is produced in one continuous operation using one batch of resin and one or several batches of dry fabrics, with traceability to the individual batches of
35、 fabric used. These batches have to be constituted from the same type of fabric, supplied by the same weaver. For film impregnation it is permissable for each batch of preimpregnate to contain two different batches of resin, one each side of the preimpregnate, provided there is no change within the
36、preimpregnate batch. A resin batch may contain up to 15% of another approved and within shelf-life resin batch of the same resin type, blended homogeneously with the major resin batch. Full traceability shall be maintained for all raw material constituents. The blended resin batch will have a single
37、 new batch number. A continuous manufacturing operation which conforms to a fixed manufacturing process is defined as one in which the process is not interrupted for more than 72 continuous hours, during this time the materials must be stored according to the certified production procedure. Any inte
38、rruption must not contain a different product run. The total production time, interruptions included, shall not exceed five days unless otherwise stated in the relevant IPS. 4 Requirements This document defines the requirements and expected performance of carbon fibre reinforced epoxy prepreg. For t
39、he complete definition of a particular material type, in addition to part 1 the relevant qualification program (e.g. part 2, 3, .I and the associated material specification is needed. The individual product specification (IPS) will define the material specific performance and will include any specif
40、ic requirement not covered in this document or may indeed over-ride a particular requirement in this document. Page 7 prEN 6044-1 : 1995 4.1 General requirements 4.1.1 Certified production procedure The product shall be manufactured to fulfil the requirements of the relevant material specification a
41、nd this technical specification. Prior to manufacture of the first qualification batch the prepreg manufacturer shall completely identify the description of the raw materials, equipment, procedures, processes and their manufacturing standards. The certified production procedure shall be presented to
42、 the purchaser upon request, if required after the signature of a confidentiality agreement for the experts who need to know. The purchaser shall treat all information contained in the schedule as confidential. Changes of the certified production procedure of a qualified product are subject to the w
43、ritten approval of the purchaser. The release test report for the first delivery made after the changed certified production procedure shall contain a reference to the change. 4.1.2 Traceability To be presented on request, each individual product shall be identifiable at all stages of manufacture an
44、d delivery. 4.1.3 Workmanship The material specified herein shall be processed as required in accordance with the best practice for high quality. Any defects in excess of those allowed according to the following as specified shall be cause for rejection of the specific roll. Two classes of workmansh
45、ip with respect to definition of defective areas are available : Class A and Class B (as defined herein). The purchase order shall state which class to be delivered and in addition if necessary special requirements due to application by automated placement equipment which shall be specified in the r
46、elevant IPS. Following requirements shall be valid if not indicated specifically. 4.1.3.1 General Defective areas are part of the delivered quantity and are not included in the costs of the material. The sum of all defective areas in a roll shall not exceed 10% of its total length. All defects withi
47、n a length of one linear meter are counted as 1 defective area. The defect indication shall be stated in a roll-related defect record as an integral part of the release test report (see chapter 6-31, together with the following information: type of defect the start and end of each defect, measured f
48、rom the beginning of the roll when it is unrolled unless otherwise agreed between supplier and purchaser. an inspection sheet (defect log) listing type, location (linear meter into the roll) and linear meter(s1 of each defective area is packaged with the specific roll. Each defective area is flagged
49、 at the side of, or on the backing foil (by means of a non-contaminating material) in such a way that easy identification during lay-up of the material is possible. Flags shall be located at the beginning and end of each defective area. Page 8 prEN 6044-1 : 1995 Procedure Table 1 : Definition of defective areas and tolerances Class A linear 1) Width (mm) 0,OO - 0,30 0,30 - 0,50 Number of defective areas Location of defective areas Length (mm) Length (mm) no limit no limit - l,o Class B not allowed - 2 x maximum Splices in the prepreg are permiss
