JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - 75
phased array method on a damaged
boat mast. The resulting cartography
can be used to size delamination and
to locate it in the depth of the material.
NDT imaging methods are very useful
to assess damage in components, as
they make it possible to size and locate
defects such as delaminations, and
thus facilitate the part cutting process
when a destructive expertise of a failed
part is needed.
Conclusion
Fig. 13: Images obtained by the different methods
Fig. 14: Evolution of delamination in the different plies
Fig. 15: Applying the phased array method on a
damaged boat mast
obtained by the different methods. A
comparison was made between the different methods, showing quite similar
images. Figure 14 shows the detailed
evolution of composite part delamination in the different plies, viewed by
thermal infrared or computed tomo-
Fig. 16: The resulting cartography
graphy testing. These tests were performed in a laboratory but the thermal
infrared and ultrasonic phased array
methods can be applied with portable
equipment on the workshop or on site.
An example is given in Figures 15 and
16, which show the application of the
Understanding the harmfulness of
imperfections and damage mechanisms
is essential to take advantage of the
high performance levels expected from
composite materials. Therefore, nondestructive testing is an invaluable tool
for mapping the internal condition of
the material. During the development
phase of a part, many defects result
from the fact that the process is not yet
optimized. Once the process has been
stabilized, defects may still be encountered during production because
composite materials are more heterogeneous and anisotropic than metals.
These defects need to be considered.
Depending on the industrial sector
concerned, taking these defects into
account is more or less complex.
Optical methods [3] allow fast and
cheap global control of composite
parts intended for low-stress or lowend products. In this area, standardization should be developed beyond
what exists today. For small/medium
series parts with high added value, it is
essential to optimize the safety factor
accurately. In this case, it is necessary
to establish the link between the detected defects and the resulting mechanical characteristics to comply with the
design rules. In the aerospace sector,
individual controls ensure a high quality of the material but the resulting cost
is high. In the automotive industry,
the unit price of parts does not allow
individual NDT. In this case, the mastery of processes is fundamental and
a statistical (probabilistic) approach
of the effect of defects is required to
No81 May - June 2013 /
jec composites magazine 75
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013
Table of Contents for the Digital Edition of JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013
Cover
Edito
Point of view GKN Aerospace: Making wing without winging it
Contents
Agenda of Events
COMPANY & BUSINESS In Brief
APPLICATIONS
Truck
Corrosion
Wind
MARKET
Carbon
Recycling
Human ressources
SPECIAL JEC ASIA 2013
Participating companies
Conferences
Awards
Life achievement
Country guest of honour: Japan
Environment
RESEARCH & DEVELOPMENT
3D fabric
Cost prediction
TECHNOLOGY & INNOVATIONS
Automotive
NDT
Carbon
Adhesives
Index
In the world
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - Cover
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - 2
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - Edito
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - Point of view GKN Aerospace: Making wing without winging it
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - 5
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - Contents
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - 7
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - 8
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - 9
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - Agenda of Events
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - 11
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - COMPANY & BUSINESS In Brief
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - 13
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - 14
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - 15
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - Truck
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - 17
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - Corrosion
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - Wind
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - 20
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - 21
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - Carbon
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - 23
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - 24
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - 25
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - Recycling
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - Human ressources
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - 28
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - 29
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - Participating companies
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - 31
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - Conferences
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - 33
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - Awards
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - 35
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - 36
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - 37
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - 38
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - Life achievement
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - Country guest of honour: Japan
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - 41
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - 42
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - 43
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - 44
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - 45
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - 46
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - 47
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - 48
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - 49
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - 50
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - 51
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - Environment
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - 53
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - 3D fabric
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - 55
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - 56
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - 57
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - 58
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - 59
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - Cost prediction
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - 61
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - 62
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - 63
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - Automotive
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - 65
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - 66
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - 67
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - 68
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - 69
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - NDT
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - 71
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - 72
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - 73
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - 74
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - 75
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - 76
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - Carbon
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - 78
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - 79
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - Adhesives
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - Index
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - In the world
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - 83
JEC COMPOSITES MAGAZINE - Issue #81 - May/June 2013 - 84
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