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BS EN 4866:2021

BS EN 4866:2021

$198.66

Aerospace series. Definitions of imperfections and defects in organic matrix composite materials

Published By Publication Date Number of Pages
BSI 2021 58
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This document provides a list of terms with their definitions illustrated by typical photographs, in order to define a common vocabulary on the imperfections and damage that may occur during the manufacture of organic matrix composite materials (which will be called “resin” in this document). Some types of damage may also be encountered in use.

This document is restricted to their definitions and does not give any acceptance criteria. The word “imperfection” will be preferred to the word “defect”, although the word “defect” might be usually used. Defect acceptance criteria to be discussed between the user and customer and documented appropriately between the two parties.

PDF Catalog

PDF Pages PDF Title
2 undefined
8 1 Scope
2 Normative references
3 Terms and definitions
3.1 General
9 3.2 Bonding imperfections
10 3.3 Presence of foreign substance
3.4 Surface imperfections
12 3.5 Cavities
3.6 Fibres arrangement imperfection
13 3.7 Imperfection specific to sandwiches
14 3.8 Stitching imperfections
15 3.9 Damage
16 3.10 Other
18 Annex A (informative)List of definitions and figures
20 Annex B (informative)Pictures of bonding imperfections
B.1 Absence of adhesive
B.2 Absence of contact
B.3 Adhesive joint colour heterogeneity
21 B.4 Adhesive rupture
B.5 Debonding
B.6 Excessive adhesive bead
B.7 Insufficient adhesion
22 B.8 Junction imperfection
B.9 Lack of adhesive
23 Annex C (informative)Pictures of presence of foreign substances
C.1 Foreign object
24 C.2 Inclusion
25 C.3 Pollution
26 Annex D (informative)Pictures of surface imperfections
D.1 Fern
27 D.2 Flaking
28 D.3 Wrinkle
29 D.4 Imprint
D.5 Indentation (dent/punching)
30 D.6 Line flash
D.7 Marbling
31 D.8 Nick
D.9 Pill
32 D.10 Projection
D.11 Resin flash
33 D.12 Scratch
D.13 Surface porosities
35 Annex E (informative)Pictures of cavities
E.1 Insufficient impregnation/dry area
36 E.2 Porosities
E.3 Voids
37 Annex F (informative)Pictures of fibres arrangement imperfections
F.1 Bird eyes
F.2 Gap/overlap
38 F.3 Off-centring
F.4 Ply misorientation
F.5 Resin accumulation
40 F.6 Undulation
41 Annex G (informative)Pictures of imperfections specific to sandwiches
G.1 Accidental filling of honeycomb cells
G.2 Core crushing (honeycomb or foam)
42 G.3 Cut honeycomb
43 G.4 Deformed honeycomb cells
G.5 Edge filling imperfections
44 G.6 Insufficient meniscus on honeycomb
45 G.7 Lack of densification
G.8 Separation of the honeycomb nodal joints
46 G.9 Slope deformation (chamfer)
47 G.10 Telegraphing
48 Annex H (informative)Pictures of stitching imperfections
H.1 Incorrect stitching depth
H.2 Loop
H.3 Missing stitching
H.4 Non-conforming spacing
H.5 Non-conforming stitching angle
49 Annex I (informative)Pictures of damages
I.1 Burn
I.2 Crack
50 I.3 Cut ply
I.4 Decohesion
51 I.5 Delamination
52 I.6 Microcrack
I.7 Perforation
53 I.8 Tearing-off of material
I.9 Whitening of the resin
54 Annex J (informative)Pictures of other imperfections
J.1 Excessive resin flow
J.2 Feather duster
J.3 Geometry imperfection
J.4 Non-conforming number of plies
55 J.5 Non-conforming stacking sequence
J.6 Non-conforming thickness
J.7 Pinching

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BS EN 4866:2021
$198.66