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Trang 1BRITISH STANDARD AEROSPACE SERIES BS EN
4408-1:2005
Technical drawings —
Representation of parts
made of composite
materials —
Part 1: General rules
The European Standard EN 4408-1:2005 has the status of a
British Standard
ICS 01.100.99; 49.020
Trang 2This British Standard was
published under the authority
of the Standards Policy and
Strategy Committee
on 31 October 2005
National foreword
This British Standard is the official English language version of
EN 4408-1:2005
The UK participation in its preparation was entrusted by Technical Committee ACE/65, Non-metallic materials for aerospace purposes (excluding textiles), to Subcommittee ACE/65/-/64, Structural reinforced plastics, which has the responsibility to:
— aid enquirers to understand the text;
— present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep
UK interests informed;
— monitor related international and European developments and promulgate them in the UK
A list of organizations represented on this subcommittee can be obtained on request to its secretary
Cross-references
The British Standards which implement international or European
publications referred to in this document may be found in the BSI Catalogue
under the section entitled “International Standards Correspondence Index”, or
by using the “Search” facility of the BSI Electronic Catalogue or of British
Standards Online
This publication does not purport to include all the necessary provisions of a contract Users are responsible for its correct application
Compliance with a British Standard does not of itself confer immunity from legal obligations.
Summary of pages
This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 9 and a back cover
The BSI copyright notice displayed in this document indicates when the document was last issued
Amendments issued since publication
Trang 3EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
EN 4408-001
May 2005
ICS 01.100.99; 49.020
English version
Aerospace series - Technical drawings - Representation of parts
made of composite materials - Part 1: General rules
Série aérospatiale - Dessins techniques - Représentation
des articles en matériaux composites - Partie 1 : Règles
générales
Luft und Raumfahrt Technische Zeichnungen -Darstellung von Teilen aus Verbundwerkstoffen - Teil 1:
Allgemeine Regeln
This European Standard was approved by CEN on 15 July 2004.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member.
This European Standard exists in three official versions (English, French, German) A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
C O M I T É E U R O P É E N D E N O R M A L I S A T I O N
E U R O P Ä I S C H E S K O M I T E E F Ü R N O R M U N G
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2005 CEN All rights of exploitation in any form and by any means reserved
worldwide for CEN national Members.
Ref No EN 4408-001:2005: E
Trang 4Contents Page
1 Scope 4
2 Normative references 4
3 Terms and definitions 5
4 Drawing presentation 5
4.1 General rules 5
4.2 Specific rules 6
5 Title block inscriptions 6
6 Title block indications 6
6.1 General tolerances 6
6.2 Marking 6
6.3 Serialisation 6
6.4 Manufacturing conditions 6
7 Dimensioning principle 7
8 Image 7
9 Notes on drawings 7
10 Thickness of parts 7
10.1 General case (structural function) 7
10.2 Special case (other functions) 7
11 Direction key 8
12 Definition of laminate areas 8
13 Material identification 8
14 Lay-up diagram 8
Trang 5EN 4408-1:2005
Foreword
This document (EN 4408-001:2005) has been prepared by the European Association of Aerospace Manufacturers - Standardization (AECMA-STAN)
After enquiries and votes carried out in accordance with the rules of this Association, this Standard has received the approval of the National Associations and the Official Services of the member countries of AECMA, prior to its presentation to CEN
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by November 2005, and conflicting national standards shall be withdrawn
at the latest by November 2005
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom
Trang 61 Scope
This standard specifies the general rules for the representation of parts made of composite materials, in technical drawings
It applies to aerospace structures using composites materials, and their applications when this standard is specified
2 Normative references
The following referenced documents are indispensable for the application of this document For dated references, only the edition cited applies For undated references, the latest edition of the referenced document (including any amendments) applies
ISO 128 (all parts), Technical drawings – General principles of presentation
ISO 129-1, Technical drawings – Indication of dimensions and tolerances – Part 1: General principles
ISO 406, Technical drawings – Tolerancing of linear and angular dimensions
ISO 1101, Geometrical Product Specifications (GPS) – Geometrical tolerancing – Tolerances of form,
orientation, location and run-out
ISO 3098-2, Technical product documentation – Lettering – Part 2: Latin alphabet, numerals and marks
ISO 5455, Technical drawings – Scales
ISO 5456-1, Technical drawings – Projection methods – Part 1: Synopsis
ISO 5456-2, Technical drawings – Projection methods – Part 2: Orthographic representations
ISO 5456-3, Technical drawings – Projection methods – Part 3: Axonometric representations
ISO 5456-4, Technical drawings – Projection methods – Part 4: Central projection
ISO 7200, Technical product documentation – Data fields in title blocks and document headers
ISO 10579, Technical drawings – Dimensioning and tolerancing – Non-rigid parts
EN 4408-002, Aerospace series – Technical drawings – Representation of parts made of composite materials
– Part 2: Laminated parts
EN 4408-003, Aerospace series – Technical drawings – Representation of parts made of composite materials
– Part 3: Parts including core materials
EN 4408-004, Aerospace series – Technical drawings – Representation of parts made of composite materials
– Part 4: Items obtained by winding
EN 4408-005, Aerospace series – Technical drawings – Representation of parts made of composite materials
– Part 5: Seams
EN 4408-006, Aerospace series – Technical drawings – Representation of parts made of composite materials
– Part 6: Preforms
Trang 73 Terms and definitions
For the purposes of this document, the following terms and definitions apply
3.1 direction key
identification on the drawing, linked to the part, according to which the directions of the lay-up diagram are defined
3.2 laminate
two or more layers cured together
3.3 laminating
process or operation binding two or more layers of material
3.4 laminate area
it allows the variations in layer arrangements (thickness) of a laminated part to be distinguished by a particular identification
A laminate area defined by a structure of layers (fabric, web, roving, fibre or core material)
3.5 laminate motif
subassembly made of several layers or plies
3.6 lay-up diagram
lay-up diagram listing the designer's requirements relative to the part for a given function
It defines the layers with respect to each other, gives their directions and completes the image and its direction key
3.7 layer
element or set of elements at a given level
One layer may be made of several plies
3.8 ply
elementary part of a laminate with only one fibre or fabric direction
NOTE Ply also designates the same element before laminating
4 Drawing presentation
The definition of a part made of composite materials includes a geometrical representation, applying general representation rules, as well as a schematic representation, applying particular rules; the whole allows for the identification of each element making up the part
4.1 General rules
Drawings of parts made of composite materials are represented in compliance with the standardisation rules defined by the following standards:
EN 4408-1:2005
Trang 8 ISO 128
ISO 129-1
ISO 3098-2
ISO 5455
ISO 5456
These rules are completed by this standard
4.2 Specific rules
Specific rules for the drawing representation of parts made of composite materials are contained in the following standards:
EN 4408-002
EN 4408-003
EN 4408-004
EN 4408-005
EN 4408-006
5 Title block inscriptions
Rules for the representation and use of the title block are given in ISO 7200
6 Title block indications
6.1 General tolerances
General dimensional tolerances shall comply with the requirements of ISO 406 and ISO 1101 unless otherwise indicated in the drawing
6.2 Marking
Recommended markings are mainly made with ink or paint
6.3 Serialisation
Serialisation shall comply with the company’s particular specifications
6.4 Manufacturing conditions
Manufacturing conditions may be subject to requirements given in a reference document on definition (for example the drawing)
Trang 97 Dimensioning principle
Traditionally, the definition of each part given in a drawing applies to the unassembled part, ready for mounting and under the following environmental conditions:
ambient temperature: (20 ± 0,5) °C;
relative humidity: (50 ± 10) %
The rules for deformable parts defined in ISO 10579 shall be observed
8 Image
Representation rules shall comply with ISO 128 and ISO 129-1
9 Notes on drawings
To keep the "image" part of the drawing as readable as possible, requirements may be expressed in the form
of notes which shall preferably be placed above the title block If possible, the content of the notes shall be standardised, succinct, and sufficient in order to avoid any ambiguity
10 Thickness of parts
10.1 General case (structural function)
No thickness indication shall be given on the drawings, the thickness resulting from the number of layers, the elaboration and obtaining method, etc
The basic thickness of the layers has to be summarised in a table which is called lay-up diagram
10.2 Special case (other functions)
The thickness of parts in areas such as crimping areas, …, has to be dimensioned at the crimping point or …;
in this case, the application area (localisation or dimension) shall be dimensioned and the thickness shall be specified in a note on the design document (see Figure 1)
Dimensions in millimetres
a The thickness in this area shall be equal to (x ± y ) mm
Figure 1 — Specification of thickness on design documents
EN 4408-1:2005
Trang 1011 Direction key
Traditionally, the reference direction for fibre, the fibre direction for web and tape of honeycomb material is the warp direction
The direction key shall be associated with a geometrical view of the part
EXAMPLE (see Figure 2):
only one key per lay-up diagram,
the 0° direction of the orientation key is chosen by the designer who shall guarantee the correct use of the drawing,
the 3 rd direction is perpendicular to the X (0°) and Y (90°) axes; the + direction corresponds to the traditional direction
of a direct axis system
Figure 2 — Direction key
12 Definition of laminate areas
A laminate area is defined by an arrangement of layers (fabric, web, roving, fibre or core material)
The areas are identified by a letter followed by a number
13 Material identification
The materials which make up the part are identified in the lay-up diagram in a note or are clearly indicated
14 Lay-up diagram
The lay-up diagram indicates area by area (see Figure 3):
identification of the area;
identification of the different elements making up the part (fabric, core material, web, adhesives, etc.);
direction of theses different elements;
theoretical ply thickness (fabric and web);
0°
90°
45°
– 45°
– 90°
Trang 11This arrangement allows an increase of the number of areas and plies with the same structure of the lay-up diagram
Direction other than 0°, 45°, − 45° or 90° shall be represented:
by a symbol at 0°, 45°, − 45° or 90°, the actual direction being indicated in the direction column, or
by a particular identification
Dimensions in millimetres
Key
1 Note relative to each layer (material, etc.)
2 Identification of layers, in increasing or decreasing order
3 Direction of layers, from – 90° to + 90°
4 Basic thickness of fabric or web
5 Thickness of areas (optional)
6 Identification of laminate areas
7 Symbols for fabric, web, adhesives, …, oriented to 0°, 45°, − 45° or 90° in the lay-up diagram, according to the direction of fabric, web, …
NOTE Unscaled lay-up diagram
Figure 3 — Example of lay-up diagram
EN 4408-1:2005
Trang 12389 Chiswick High Road
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