1、AECMA STANDARD NORME AECMA AECMA NORM 1 Descriptors: prEN 4408-3 Edition P I June 2002 PUBLISHED BY THE EUROPEAN ASSOCIATION OF AEROSPACE INDUSTRIES - STANDARDIZATION fio Gulledelle 94 - 8-1200 Brussels - Tel. + 32 2 775 81 10 - Fax. + 32 2 775 81 11 - www.aecma-stan.org ICs: ENGLISH VERSION Aerospa
2、ce series Technical d raw n g s Representation of parts made of composite materials Part 3: Parts including core materials Srie arospatiale Dessins techniques Reprsentation des articles en matriaux composites Partie 3 : Articles intgrant des matriaux dme Luft- und Raumfahrt Technische Zeichnungen Da
3、rstellung von Teilen aus Verbundwerkstoffen Teil 3: Teile mit Kernwerkctoffen This “Aerospace Series“ Prestandard has been drawn up under the responsibility of AECMA-STAN (The European Association of Aerospace Industries - Standardization). It is published on green paper for the needs of the Europea
4、n 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 that interchangeability is affected, physically or functionally, without
5、 re-identification of the standard. After examination and review by users and formal agreement of AECMA-STAN it will be submitted as a draf? European Standard to CEN (European Committee for Standardization) for formal vote. I Nota - Extra copies can be supplied by B.N.A.E. - Technopolis 54 - 199. ru
6、e Jean-Jacques Rousseau - 921 38 ISSY-LES-MOULINEAUX CEDEX Procedure and Process Domain 1 Edition approved for publication I Comments should be sent within six months after the date of publication to 28 June 2002 AECMA-STAN Gulledelle 94 8-1200 BRUXELLES Copyright 2002 O by AECMA-STi Page 2 prEN 440
7、8-3: 2002 Foreword This standard has been prepared by former AECMA-CN CO and was reviewed by the Domain Technical Coordinator of AECMA-STANS Process Domain. Contents Page 1 2 3 4 4.1 4.1.1 4.1.2 4.2 4.2.1 4.2.2 4.2.3 4.2.4 4.3 5 5.1 5.2 Annex A . 3 Normative references 3 Terms and definitions. 3 . .
8、 Drawings representation . General representation . Identification of core material layers Representation of core material layers . Specific representations _ . 5 5 5 6 6 6 7 8 9 9 Recommended symbols in the lay-up diagram . 9 Dimensions of recommended symbols . 1 O Example of a laminate representat
9、ion and lay-up diagram . 11 (informative) Bibliography . . . . 13 Page 3 prEN 4408-3: 2002 I Scope This standard specifies the rules for the representation of parts including core materials as well as the information to be indicated in technical drawings. It applies to aerospace structures using cor
10、e materiais. It shall be used together with EN 4408-1. 2 Norm at ive references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter.
11、 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 publication referred to applies. EN 4408-1 Aerospace series - Technical dr
12、awings - Representation of parts made of composite materials - Part 1 : General rules 1) Aerospace series - Technical drawings - Representation of parts made of composite materials - Part 2: Laminated parts 1) EN 4408-2 3 Terms and definitions For the purposes of this standard the terms and definiti
13、ons given in EN 4408-1 and the followings apply : 3.1 alveolar material semi-finished product made of partly bonded or welded ribbons (before or after forming) to form geometrically identical patterns (see figure 1 and figure 2) 3.2 cell basic closed unit of an alveolar, made of two successive tapes
14、 after forming ribbons (see figure 1 and figure 2) W i Welding or bonding NOTE A set of cells makes up the alveolar material Figure 1 1) Published as AECMA Prestandard at the date of publication of this standard Page 4 prEN 4408-3: 2002 Key 1 Alveolar material side 2 Tape joining plane 3 Direction L
15、 (of tapes) Figure 2 3.3 core material structure result of the indivisible assembly of two coatings or fine skins on a core which keeps them separate NOTE This structure is also designated by the term sandwich. 3.4 drained alveolar material wall of cells with notches to avoid possible retention of l
16、iquid (see figure 3) Figure 3 3.5 face surface intended to be in contact with or parallel to the skin (see figure 1 and figure 2) 3.6 foam approximately isotropic, flexible or rigid, alveolar material 3.7 honeycomb alveolar material with hexagonal cells Page 5 prEN 4408-3: 2002 3.8 L direction direc
17、tion of the tape also called tape direction (see figure 1 and figure 2) 3.9 pe rfo rat e d a I veo I a r m at e ri a I alveolar material with cell walls which are perforated to avoid overpressure or depression leading to mechanical stress within the part (see figure 4) Figure 4 3.1 O side of a cell
18、(H) the sides of cells are defined by their walls; the height of the sides corresponds to the width of the honeycomb material tape 3.1 1 tape designates each ribbon which makes up the alveolar material 3.1 2 W direction direction perpendicular to the direction of the tape (L) in the plane (or face)
19、of the alveolar material 4 Drawings representation The general rules for the representation of parts including core material are specified in EN 4408-1, A general representation of parts including core material is given in 4.1. If the alveolar material is drainded, perforated, contains filling areas
20、 or inserts, this general representation shall be completed by figures as specified in 4.2. 4. I General representation 4.1 .I Each honeycomb or foam layer shall be identified. Identification of core material layers Page 6 prEN 4408-3: 2002 Example for the identification by a 3-figure number, beginn
21、ing at O1 1 (see figure 5) * I I 013/ Key O1 I alveolar material 118 O1 2 alveolar material 114 O1 3 alveolar material 118 NOTE ( O1 1 ) and ( 013 ) are made of the same alveolar material but their contour is different. Figure 5 4.1.2 On the view projected perperdiculary on to the sandwich panel pla
22、ne, the different areas of the material are limited by fine interrupted lines. Alveolar material is represented by lines which are perpendicular to the panel plane (see figure 6). Representation of core material layers Figure 6 -Alveolar material, cross section Foam is represented by circles (see fi
23、gure 7). Figure 7 - Foam, cross section 4.2 Specific representations 4.2.1 Drained alveolar material If a layer is made up of drained alveolar material and if the draining direction has to be specified, some cells shall be enlargened and the draining notches shall be represented by two parallel line
24、s which cross the sides of the drained cells (see figure 8 and figure 9) in a view which is parallel to the panel plane. Page 7 prEN 4408-3: 2002 II II Figure 8 - Alveolar material, drained on 2 sides Figure 9 -Alveolar material, drained on 4 sides Drajning is represented by a symbolisation of the n
25、otches on the relevant side of each cell (see figure 10 and figure 11) in a cross-sectional view. Figure 10 - Alveolar material, cross section drained on 1 side Figure I I - Alveolar material, cross section drained on 2 sides 4.2.2 Perforated alveolar material If a layer is made up of perforated alv
26、eolar material an if the draining direction has to be specified, some cells shall be enlargened and the perforations shall be represented by a circle which crosses the sides of the perforated cells (see figure 12 and figure 13) in a view which is parallel to the panel plane. Figure 12 -Alveolar mate
27、rial, perfored on 2 sides Figure 13 - Alveolar material, perfored on 4 sides T Page 8 prEN 4408-3: 2002 Perforations are represented by the symbolisation of the circles on the relevant side of each cell (see figure 14). Figure 14 4.2.3 Filling zones The filling zones of alveolar cells are limited by
28、 a fine continuous line and the filling is represented by hatching. For identification of the material and the filling process, refer to a note (see figure 15). Fillings of edges are not represented in a plane view. Only the cross section which defines the edging profile indicates the filling. For a
29、 cross-sectional representation, these filling zones shall include: - filling of the whole cell, - filling of the edging, - alveolar material joinings (see figure 16). I NOTE NOTE Filling per product . to document . Figure 15 I I I wlllllll I I I Key 1 2 3 Bordering filling Alveoar material joining
30、Filling of whole cell Figure 16 Page 9 prEN 4408-3: 2002 4.2.4 Inserts As the inserts are located in those areas of the alveolar material the cells of which are filled, only the filling is indicated and reference is made to a cross section to allow for correct visualisation of the location (see figu
31、re 17). Inserts are represented by their geometry within the cross section. Key 1 Densification foam 2 Bonding material Figure 17 4.3 Representation in lay-up diagram Each constituing element of a part including core material shall occupy one line in the lay-up diagram. 5 Recommended symbols in the
32、lay-up diagram The recommended symbols are given in table 1 Table 1 DESIGNATION I SYMBOL I COMMENTS NON DRAINED AND NON PERFORED ALVEOLAR MATERIAL The length of the rectangle corresponds to the tape direction ALVEOLAR MATERIAL DRAINED ON 1 SIDE The curve side corresponds to the drained side ALVEOLAR
33、 MATERIAL DRAINED ON 2 SIDES PERFORED ALVEOLAR MATERIAL lol FOAM El Page 10 prEN 4408-3: 2002 5.1 Dimensions of recommended symbols See figure 18 and table 2. R r EF Figure 18 Table 2 - Recommended values Format A4, A3, A2 AI, AO, X Dimension 0,7 I I Line width L 5 7 5 l4 Page 11 prEN 4408-3: 2002 5
34、.2 See figure 19 and figure 20. Example of a laminate representation and lay-up diagram - I I I I I I I I I 1- - A3 I I 1 I I I I t- - I 4. 90“ It O“ I - 90“ Figure 19 Page 12 prEN 4408-3: 2002 Dimensions in millimetres - 45“ O“ - - 0,33 0,33 0,15 - - 126 Q 1 121 I 116 I 014 90“ 15 1 013 -45“ 15 1 0
35、12 O“ 15 Q I o11 u Q 1 111 -i- x - q- 45“ I 0,33 J Lu O A2 I A3 I A4 Aera thickness WARP O“ + Key Q 0 o 0 Epoxy resin glass fibre, bidirectional impregnated Carried glue film to document . 118 alveolar material aluminium to document .,. 1/4 alveolar material aluminium to document . Figure 20 Page 13
36、 prEN 4408-3: 2002 Annex A (informative) Bibliography EN 4408-1 Aerospace series - Technical drawings - Representation of parts made of composite materials - Part 1: General rules EN 4408-2 EN 4408-4 Aerospace series - Technical drawings - Representation of parts made of composite materials - Part 2
37、: Laminated parts Aerospace series - Technical drawings - Representation of parts made of composite materials - Part 4: Items obtained by winding Aerospace series - Technical drawings - Representation of parts made of composite materials - Part 5: Seams EN 4408-5 EN 4408-6 Aerospace series - Technical drawings - Representation of parts made of composite materials - Part 6: Preforms
