JEC COMPOSITES MAGAZINE - Issue #114 - July 2017 - 28
MANUFACTURING out-of-autoclave
New toughened out-of-autoclave prepreg
After five years of development, Tencate releases a new toughened
out-of-autoclave prepreg. The porosity level of the resulting cured parts
is compatible with aeronautical specifications. Moreover, this new prepreg
has a long outlife and is easy to inspect in comparison with other toughened epoxy systems.
T
he new toughened epoxy resin
system developed by Tencate,
named TC380 epoxy, is mainly
dedicated to aircraft structures, thick
parts cured under low pressure and
honeycomb stiffened parts manufactured by automated or hand lay-up
processes. With this new product, the
company sets a new benchmark for
toughened epoxy prepreg systems.
Two cure options
This out-of-autoclave/vacuum-bagonly (OOA/VBO) system has two
cure options depending on the allowable time or the oven temperature:
- Cure A: debulk under vacuum every
four plies for fifteen minutes, apply
vacuum, hold for four hours at room
temperature, ramp-up of 0.6°C per
minute to 107°C, hold for one hour,
then 0.6°C per minute to 180°C,
hold two hours, cool to below 49°C
at 3°C per minute or less, release
vacuum (Figure 1a).
- Cure B: debulk under vacuum every
four plies for fifteen minutes, apply
vacuum, hold for four hours at room
temperature, ramp-up of 0.6°C per
minute to 107°C, hold for one hour,
then 0.6°C per minute to 135°C,
hold three hours. Demould and
post-cure free standing at 180°C for
two hours (Figure 1b).
Compression properties
According to Tencate, the TC380 system is extremely tough with an excellent balance of open-hole compression
Fig. 1a: Cure A cycle time
28
jec composites magazine / N°114 July 2017
Fig. 1b: Cure B cycle time
(OHC), open-hole tension (OHT),
compression after impact (CAI), and
Mode I & II fracture toughness properties (GIC/GIIC), see Figure 2. The
system also exhibits excellent strength
retention from room temperature dry
(RTD) to elevated temperature wet
(ETW) thanks to its low moisture absorption with a service temperature of
121°C. Its dry Tg measured by dynamic mechanical analysis is 180°C.
Wing spar demonstrator
TenCate manufactured a typical industrial part using the TC380 system
- a 91-ply wing spar - and measured
the void content in various locations,
showing a high degree of consolidation under OOA/VBO processing. The maximum void content was
0.313%, i.e. extremely low.
Table of Contents for the Digital Edition of JEC COMPOSITES MAGAZINE - Issue #114 - July 2017
Cover
Edito
Opinion: Composite music
Contents
NEWS
In brief
Raw materials
Agenda
BUSINESS
Thermoset resin - Part B
Glass fibre
Construction
MANUFACTURING
Control
Out-of-autoclave
Recycling
Feature Sports & Leisure - Composites: the key to performance?
Software
CFRP
Simulation
Golf
Biocomposites
Natural fibre
SOLUTIONS
Infrastructure
Roofing and siding
In the world
TECHNOLOGY
Software
A novel physics node for Nakamura crystallization kinetics
Index
Advertisers
JEC COMPOSITES MAGAZINE - Issue #114 - July 2017 - 60
JEC COMPOSITES MAGAZINE - Issue #114 - July 2017 - Cover
JEC COMPOSITES MAGAZINE - Issue #114 - July 2017 - 2
JEC COMPOSITES MAGAZINE - Issue #114 - July 2017 - Edito
JEC COMPOSITES MAGAZINE - Issue #114 - July 2017 - Opinion: Composite music
JEC COMPOSITES MAGAZINE - Issue #114 - July 2017 - 5
JEC COMPOSITES MAGAZINE - Issue #114 - July 2017 - Contents
JEC COMPOSITES MAGAZINE - Issue #114 - July 2017 - 7
JEC COMPOSITES MAGAZINE - Issue #114 - July 2017 - In brief
JEC COMPOSITES MAGAZINE - Issue #114 - July 2017 - 9
JEC COMPOSITES MAGAZINE - Issue #114 - July 2017 - 10
JEC COMPOSITES MAGAZINE - Issue #114 - July 2017 - Raw materials
JEC COMPOSITES MAGAZINE - Issue #114 - July 2017 - AD1
JEC COMPOSITES MAGAZINE - Issue #114 - July 2017 - AD2
JEC COMPOSITES MAGAZINE - Issue #114 - July 2017 - 12
JEC COMPOSITES MAGAZINE - Issue #114 - July 2017 - AD3
JEC COMPOSITES MAGAZINE - Issue #114 - July 2017 - AD4
JEC COMPOSITES MAGAZINE - Issue #114 - July 2017 - 13
JEC COMPOSITES MAGAZINE - Issue #114 - July 2017 - Agenda
JEC COMPOSITES MAGAZINE - Issue #114 - July 2017 - Thermoset resin - Part B
JEC COMPOSITES MAGAZINE - Issue #114 - July 2017 - 16
JEC COMPOSITES MAGAZINE - Issue #114 - July 2017 - 17
JEC COMPOSITES MAGAZINE - Issue #114 - July 2017 - 18
JEC COMPOSITES MAGAZINE - Issue #114 - July 2017 - Glass fibre
JEC COMPOSITES MAGAZINE - Issue #114 - July 2017 - 20
JEC COMPOSITES MAGAZINE - Issue #114 - July 2017 - Construction
JEC COMPOSITES MAGAZINE - Issue #114 - July 2017 - 22
JEC COMPOSITES MAGAZINE - Issue #114 - July 2017 - 23
JEC COMPOSITES MAGAZINE - Issue #114 - July 2017 - Control
JEC COMPOSITES MAGAZINE - Issue #114 - July 2017 - 25
JEC COMPOSITES MAGAZINE - Issue #114 - July 2017 - 26
JEC COMPOSITES MAGAZINE - Issue #114 - July 2017 - 27
JEC COMPOSITES MAGAZINE - Issue #114 - July 2017 - Out-of-autoclave
JEC COMPOSITES MAGAZINE - Issue #114 - July 2017 - 29
JEC COMPOSITES MAGAZINE - Issue #114 - July 2017 - Recycling
JEC COMPOSITES MAGAZINE - Issue #114 - July 2017 - 31
JEC COMPOSITES MAGAZINE - Issue #114 - July 2017 - 32
JEC COMPOSITES MAGAZINE - Issue #114 - July 2017 - Software
JEC COMPOSITES MAGAZINE - Issue #114 - July 2017 - 34
JEC COMPOSITES MAGAZINE - Issue #114 - July 2017 - CFRP
JEC COMPOSITES MAGAZINE - Issue #114 - July 2017 - 36
JEC COMPOSITES MAGAZINE - Issue #114 - July 2017 - Simulation
JEC COMPOSITES MAGAZINE - Issue #114 - July 2017 - Golf
JEC COMPOSITES MAGAZINE - Issue #114 - July 2017 - 39
JEC COMPOSITES MAGAZINE - Issue #114 - July 2017 - Biocomposites
JEC COMPOSITES MAGAZINE - Issue #114 - July 2017 - 41
JEC COMPOSITES MAGAZINE - Issue #114 - July 2017 - Natural fibre
JEC COMPOSITES MAGAZINE - Issue #114 - July 2017 - 43
JEC COMPOSITES MAGAZINE - Issue #114 - July 2017 - 44
JEC COMPOSITES MAGAZINE - Issue #114 - July 2017 - AD5
JEC COMPOSITES MAGAZINE - Issue #114 - July 2017 - AD6
JEC COMPOSITES MAGAZINE - Issue #114 - July 2017 - SOLUTIONS
JEC COMPOSITES MAGAZINE - Issue #114 - July 2017 - 46
JEC COMPOSITES MAGAZINE - Issue #114 - July 2017 - 47
JEC COMPOSITES MAGAZINE - Issue #114 - July 2017 - Infrastructure
JEC COMPOSITES MAGAZINE - Issue #114 - July 2017 - Roofing and siding
JEC COMPOSITES MAGAZINE - Issue #114 - July 2017 - In the world
JEC COMPOSITES MAGAZINE - Issue #114 - July 2017 - Software
JEC COMPOSITES MAGAZINE - Issue #114 - July 2017 - 52
JEC COMPOSITES MAGAZINE - Issue #114 - July 2017 - 53
JEC COMPOSITES MAGAZINE - Issue #114 - July 2017 - A novel physics node for Nakamura crystallization kinetics
JEC COMPOSITES MAGAZINE - Issue #114 - July 2017 - 55
JEC COMPOSITES MAGAZINE - Issue #114 - July 2017 - 56
JEC COMPOSITES MAGAZINE - Issue #114 - July 2017 - 57
JEC COMPOSITES MAGAZINE - Issue #114 - July 2017 - Advertisers
JEC COMPOSITES MAGAZINE - Issue #114 - July 2017 - 59
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