1、AECMA STANDARD NORME AECMA AECMA NORM Edition approved for publication 28June2002 prEN 4408-2 Edition P 1 June 2002 Comments should be sent within six months after the date of publication to Gulledelle 94 Procedure and Process Domain AECMA-STAN 8-1200 BRUXELLES PUBLISHED BY THE EUROPEAN ASSOCIATION
2、OF AEROSPACE INDUSTRIES - STANDARDIZATION klQhosT.m Gulledelle 94 - 8-1200 Brussels -Tel. + 32 2 775 81 10 - Fax. + 32 2 775 811 1 - www.aecma-stan.org ENGLISH VERSION Aerospace series Technical drawings Representation of parts made of composite materials Part 2: Laminated parts Srie arospatiale Des
3、sins techniques Reprsentation des articles en matriaux composites Partie 2 : Articles draps Luft- und Raumfahrt Technische Zeichnungen Darstellung von Teilen aus Verbundwerkstoffen Teil 2: Schichtstoffteile Page 2 prEN 4408-2: 2002 Foreword This standard has been prepared by former AECMA-CN CO and w
4、as reviewed by the Domain Technical Coordinator of AECMA-STANS Process Domain. Contents 1 2 3 4 5 5.1 5.2 5.3 5.4 5.4.1 5.4.2 5.4.3 5.4.4 Annex A Normative references Terms and definitions _I._. . , , , . . . . . . , . , , , . . , . . , , , . . . . . . . . . , , . . . . . , . . . . . . . . . . , . .
5、 , . , , , , , , . , . . . . . ., , . , . . , . . . . . . . . . . . . . . . . . . . ._,. . ,. . . . . . . . Recommended workplan . Page 3 3 3 3 3 3 3 4 6 6 7 9 10 13 Page 3 prEN 4408-2: 2002 I Scope This standard specifies the rules for the representation of laminated parts as well as the informatio
6、n to be indicated in technical drawings. It applies to aerospace structures using laminated parts. It shall be used together with EN 4408-1. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are ci
7、ted 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 incorporated in it by amendment or revision. For undated references the latest editi
8、on of the publication referred to applies. EN 4408-1 Aerospace series - Technical drawings - Representation of parts made of composite materials - Part 1 : General rules 1) 3 Terms and definitions For the purposes of this standard, the terms and definitions given in EN 4408-1 apply. 4 General rules
9、The general rules for the representation of parts made of composite material are specified in standard EN 4408-1. 5 Specific rules The representation of laminated parts basically differs from the others parts by the detailed representation of the different layers which make up the part. 5.1 Content
10、of definition The definition of a part includes: - the list of the elements which make up the part; - the notes and definition of the materials; - the definition of the laminate aeras; - the representation and the lay-up diagram; - the direction key(s) for laminating. 5.2 Recommended workplan See ta
11、ble 1. 1) Published as AECMA Prestandard at the date of publication of this standard Page 4 prEN 4408-2: 2002 2 Define direction keys Table 1 5.4.3 I Work order I Observations I Subclause I 4 I 1 I Show laminate representation I Fill in lay-up diagram I 5.4.4.2 and EN 4408-1 5.3 I 5.4.1 and 5.4.2 I
12、J I Make drawing of the definition I of the part This drawing can be done before or during laminate representation 1 3 I Define laminate aeras I I 5.4.3 _ EN 4408-1 5.3 Laminate representation This representation, specifying the details of the layers making up the part and their individual identific
13、ation, may be: - a detailed view; - a cross section; - a perspective; . - The part is represented in an unmachined state. For the representation of a section, see figure I. Each layer is represented by a continuous thick line which marks the middle line of the layer. The extremities of each layer ar
14、e represented by a point, while keeping the drawing readable. No point shall be at direction changes or at intersections. - To avoid any reprography or microfilming problem, the minimum distance between two consecutive lines shall not be less than 0,8 mm or twice the line width (refer to the values
15、in the table). - A complete representation at a more representative scale shall be considered to improve the readability of the drawing, especially in aeras with sudden changes in profile or connection, , . . 1 126 I /-E r? a The laminate representation does not define the ply or layer dimensions. F
16、igure 1 Page 5 prEN 4408-2: 2002 For a detailed view, see figure 2. 90 f ! i I I I I I I I I I l I I I I I I I I l I I I I l I ! I Area AUA5 - Area ALIA5 Figure 2 Page 6 prEN 4408-2: 2002 I -._- t SI8 5.4 5.4.1 Layer identification Layer are identified by a number. Identification of a section (see f
17、igures 3 and 4). Identification is achieved by 3-figure numbers increasing 5 by 5 and beginning at 1 01. This identification method allows to interpose a layer without modifying the other identifications. Generaly the identification is marked at the extremity of the ply by a fine line which is inter
18、rupted before the designated ply (see figure 3). Analysis of the content of the laminate representation t 101 /- Figure 3 If the identification cannot be placed at the extremity of the ply, it shall conform to figure 4. 1 o1 .-.-.o /- 0 Figure 4 NOTE laminate and be renumbered. The line in the lay-u
19、p diagram corresponding to the old number can be left blank. If a layer is modified (cutting, material, direction), its number can be deleted from the drawing of the For a detailed view, see figure 5. Figure 5 Page 7 prEN 4408-2: 2002 5.4.2 5.4.2.1 Connection of plies The connection of plies shall b
20、e spefied in the definition: Connection of plies and dimensions Example of a section (see table 21 Table 2 - IL REPRESENTATIONS 5 A2 NOTE A2 AI 1 A2 NOTE NOTE Overlapped area and/or with edge to edge cutting allowable L : Value to be defined by the designer I REPRESENTATIONS I I EDGETOEDGE MANDATORY
21、 - I- AI 1 A2 NOTE I I T ALLOWABLE NOTE Overlapped area and/or with edge to edge cutting allowable I I O BS E RVATIO NS A note shall speciQ the dimension “a“ of the overlapping (s) NOTE For each ply: + a = . mm I- The overlapping is represented and identified as a ply. The localisation of overlapped
22、 aeras andlor with allowable edge to edge cutting shall be indicated in the laminate areas by notes. OBSERVATIONS The localisation of overlapped aeras andlor with allowable edge to edge cutting shall be indicated in the laminate areas by notes. Page 8 prEN 4408-2: 2002 mm 5.4.2.2 Recommended dimensi
23、ons - Overlapping dimensions less than or equal to 1 (see figure 6 and table 3) mm Figure 6 1 Table 3 5 7 Format A4, A3, A2 mm 5 0,5 1 13 0,8 AI, AO, X mm 7 0,7 2 3 195 d 2 4 - Dimensions for edge to edge connection (see figure 7 and table 4) Motif width . NOTE Minimum values for width of lines and
24、point diameter, , i ar given in table 4. Figure 7 Table 4 r Dimension I d I Width e I point 0 1 Motif width Format Page 9 prEN 4408-2: 2002 5.4.3 Definition of laminate aeras The aeras are identified by a letter followed by a number; for example : AI, A2, A3, . . . On a cross section, aeras dimensio
25、ning lines are dimension lines which finish at the extremity of each aera in the form of points (see figure 8). A4 NOTE 7 In aeras with varying thicknesses, a note has to be added (see figure 9). Figure 8 X = . mm I -N times x mm I NOTE STAIRLIKE ARRANGEMENT OF LAYER WITH X= . mm Figure 9 Page 10 pr
26、EN 4408-2: 2002 DESIGNATIONS 5.4.4 Symbols See table 5. SYMBOLS + I FINE WEB a I I m WEB, FILAMENTARY ROVING FABRIC, WARP SIDE I I - FABRIC, WEFT SIDE -t- BALANCED FABRIC OR SIDE IRRELEVANT BALANCED MULTILAYER O INDICATES THAT DIRECTION IS IRRELEVANT m STRUCTURAL ADHESIVE REPRESENTS ALL UNDEFINED LA
27、YERS O0 MOTIF a non-woven, of fine thickness warp side: side directed towards the positive areas of the direction key NOTE All combinaisons can be considered. Page 11 prEN 4408-2: 2002 Line width 5.4.4.1 Dimensions of symbols See figure 10 and table 6. mm mm 035 0,7 t t I I X -1 t Figure 10 Table 6
28、- Recommended values Format L 5 7 H 3 5 Page 12 prEN 4408-2: 2002 5.4.4.2 See figure 11. Example of a lay-up diagram Dimensions in millimetres Key Bidirectional polyimide carbonhesin fabric Bidirectional E glasslepoxy resin fabric Redux 322 adhesive O“ 3 Stairlike arrangement of plies with: NOTE Thi
29、s lay-up diagram corresponds to the cross section in figure 1. Figure II Page 13 prEN 4408-2: 2002 Annex A (informative) Bibliography EN 4408-1 EN 4408-3 Aerospace series - Technical drawings - Representation of parts made of composite materials - Part I : General rules Aerospace series - Technical
30、drawings - Representation of parts made of composite materials - Part 3: Parts including core materials 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 4408-4 EN 4408-5 EN 4408-6 Aerospace series - Technical drawings - Representation of parts made of composite materials - Part 6: Preforms
