JEC COMPOSITES MAGAZINE - Issue #122 - July 2018 - 42

FEATURE AEROSPACE research
generally aims at predicting mould filling
times and/or resin front kinetics and optimizing them according to the polymerization cycles of resins.
Multiphysics analysis and functionalization of composite materials
To propose reliable numerical models,
test benches were developed/adapted to
determine the anisotropic thermal conductivity of composite materials by inverse
analysis. This work, carried out in collaboration with ICA's Measurement research
group, is based on original approaches using non-contact measurement by infrared
thermography. The other part of the work,
related to thermal and electrical properties, consists in preparing and characterizing functionalized matrices in order to
improve the properties of composites. As
the aim is to meet the needs of the aerospace industry regarding conductivity issues, the studies focus on thermoset and
thermoplastic matrices functionalized by
nanometric particles. On the thermal side,
a hybrid composite material consisting of a
polymer matrix doped with micro- and nanoparticles and reinforced with long pitch
carbon fibres was developed in order to
significantly increase thermal conductivity. On the electrical side, another example
is the design of a thermoplastic PEEK/carbon fibre/carbon nanotube (CNT) matrix
composite without compatibilizing agents.
The goal is to produce a PEEK/carbon
laminate with through-the-thickness electrical properties, enhanced by the incorporation of CNT.
More generally, these efforts are part of the
functionalization of materials using a nanoscale phase, particularly via an aligned
carbon nanotube forest, which is intended to improve the impact response or the
thermal or electrical conductivity through
the thickness of composite materials.
Work is currently underway to integrate
nanotube mats grown either on a substrate
or directly on carbon fabrics, or by liquid
or pre-impregnated processes.
The research work then consists in characterizing the processing properties, the
microstructure and the different interface
scales, and determining the mechanical

42

Fig. 2: Simulation of resin flow in a 3D reinforcement at different scales

Fig. 3: Modelling thermal conductivity in a doped composite material

properties of the composite over a broad
spectrum of stresses (static and dynamic).
Modelling thermal and electrical transfers
in functionalized matrices requires the use
of models at the microscopic scale. This
work aims to improve the understanding
of size, dispersion and orientation effects
in order to optimize the morphologies of
composites and to enhance homogenized
approaches.
In processes using radiating sources (infrared emitters), the prediction of thermal
fields requires the development of advanced numerical models taking radiation
heat exchange into account.
The research work thus led to the development of radiative transfer modelling using
ray throw approaches. Initially developed
for packaging applications, the models
were progressively improved and adapted
to composite applications (epoxy curing
and preform heating in a stamping process).

jec composites magazine / N°122 July 2018

Processes and structures
Understanding and modelling variability sources in composite structures
Various sources of variability within composite structures were analysed, in particular
with regard to the measurement of spatial
variations of "topological" quantities and
material quantities. These include spatial variations in ply thicknesses, strand orientations
or the matrix ratio, during and after the manufacturing process. A mathematical modelling of these spatial variations was proposed
based on statistical studies of the different
parameters that control these mathematical
laws. Three examples of applications associated with these developments are particularly noteworthy:
- Prediction of residual curing strains of a
laminated plate generated by "topological"
variabilities;
- Prediction of the stiffness dispersion of a
composite beam in 3-point bending;
- Prediction of the localization variability



Table of Contents for the Digital Edition of JEC COMPOSITES MAGAZINE - Issue #122 - July 2018

Cover
Edito
Opinion: Bringing expertise on board
Contents
NEWS
In brief
Announcement at OC
Agenda
BUSINESS
Trends - Overview of the global carbon composites market Simulation
Market - Attractive growth opportunities for composites in the transportation market
MANUFACTURING
Fibre placement - Fibre placement on-line monitoring and solutions for quality optimisation
Fibre placement - Repurposing residual AFP tape for complex aerospace parts
Monitoring - Overcoming the complexities of RTM
Joining process - Filament winding for automated joining of lightweight profiles
Aerospace - Are thermoplastics essential to the future of composites in aeronautics?
Thermoplastic - Full out-of-autoclave thermoplastic welded airframe
Thermoplastic - Thermoplastic composites are vital to drive aerospace build rates
UAV - The Dash X unmanned aerial vehicle
Nano-satellite - Successful mission of TuPOD, a TubeSats deployer manufactured via additive manufacturing
Manufacturing - Orbital ATK and Lockheed Martin celebrate F-35 programme milestone
Light aviation - A “one shot” aircraft to revolutionize the light aviation sector
Research - An aeronautics and space-oriented research group
SOLUTIONS
Sustainability - Agricultural waste for thermal and acoustic insulation in construction
Recycling - Natural fibres and recycled rubber: new alternative solutions for composite panels
Artistic vases - Art FRP, an innovation based on the Japanese traditional sense of beauty
In the world
TECHNOLOGY
Nanotubes - Conductive glass fibre products using single-wall carbon nanotubes
Simulation - Optimizing the key manufacturing parameters of the AFP process
Index
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JEC COMPOSITES MAGAZINE - Issue #122 - July 2018 - 68
JEC COMPOSITES MAGAZINE - Issue #122 - July 2018 - Cover
JEC COMPOSITES MAGAZINE - Issue #122 - July 2018 - 2
JEC COMPOSITES MAGAZINE - Issue #122 - July 2018 - Edito
JEC COMPOSITES MAGAZINE - Issue #122 - July 2018 - Opinion: Bringing expertise on board
JEC COMPOSITES MAGAZINE - Issue #122 - July 2018 - 5
JEC COMPOSITES MAGAZINE - Issue #122 - July 2018 - Contents
JEC COMPOSITES MAGAZINE - Issue #122 - July 2018 - 7
JEC COMPOSITES MAGAZINE - Issue #122 - July 2018 - In brief
JEC COMPOSITES MAGAZINE - Issue #122 - July 2018 - 9
JEC COMPOSITES MAGAZINE - Issue #122 - July 2018 - Announcement at OC
JEC COMPOSITES MAGAZINE - Issue #122 - July 2018 - 11
JEC COMPOSITES MAGAZINE - Issue #122 - July 2018 - 12
JEC COMPOSITES MAGAZINE - Issue #122 - July 2018 - Agenda
JEC COMPOSITES MAGAZINE - Issue #122 - July 2018 - Trends - Overview of the global carbon composites market Simulation
JEC COMPOSITES MAGAZINE - Issue #122 - July 2018 - 15
JEC COMPOSITES MAGAZINE - Issue #122 - July 2018 - Market - Attractive growth opportunities for composites in the transportation market
JEC COMPOSITES MAGAZINE - Issue #122 - July 2018 - 17
JEC COMPOSITES MAGAZINE - Issue #122 - July 2018 - Fibre placement - Fibre placement on-line monitoring and solutions for quality optimisation
JEC COMPOSITES MAGAZINE - Issue #122 - July 2018 - 19
JEC COMPOSITES MAGAZINE - Issue #122 - July 2018 - 20
JEC COMPOSITES MAGAZINE - Issue #122 - July 2018 - Fibre placement - Repurposing residual AFP tape for complex aerospace parts
JEC COMPOSITES MAGAZINE - Issue #122 - July 2018 - 22
JEC COMPOSITES MAGAZINE - Issue #122 - July 2018 - Monitoring - Overcoming the complexities of RTM
JEC COMPOSITES MAGAZINE - Issue #122 - July 2018 - 24
JEC COMPOSITES MAGAZINE - Issue #122 - July 2018 - Joining process - Filament winding for automated joining of lightweight profiles
JEC COMPOSITES MAGAZINE - Issue #122 - July 2018 - 26
JEC COMPOSITES MAGAZINE - Issue #122 - July 2018 - Thermoplastic - Full out-of-autoclave thermoplastic welded airframe
JEC COMPOSITES MAGAZINE - Issue #122 - July 2018 - 28
JEC COMPOSITES MAGAZINE - Issue #122 - July 2018 - 29
JEC COMPOSITES MAGAZINE - Issue #122 - July 2018 - Thermoplastic - Thermoplastic composites are vital to drive aerospace build rates
JEC COMPOSITES MAGAZINE - Issue #122 - July 2018 - 31
JEC COMPOSITES MAGAZINE - Issue #122 - July 2018 - UAV - The Dash X unmanned aerial vehicle
JEC COMPOSITES MAGAZINE - Issue #122 - July 2018 - 33
JEC COMPOSITES MAGAZINE - Issue #122 - July 2018 - Nano-satellite - Successful mission of TuPOD, a TubeSats deployer manufactured via additive manufacturing
JEC COMPOSITES MAGAZINE - Issue #122 - July 2018 - 35
JEC COMPOSITES MAGAZINE - Issue #122 - July 2018 - 36
JEC COMPOSITES MAGAZINE - Issue #122 - July 2018 - 37
JEC COMPOSITES MAGAZINE - Issue #122 - July 2018 - Manufacturing - Orbital ATK and Lockheed Martin celebrate F-35 programme milestone
JEC COMPOSITES MAGAZINE - Issue #122 - July 2018 - Light aviation - A “one shot” aircraft to revolutionize the light aviation sector
JEC COMPOSITES MAGAZINE - Issue #122 - July 2018 - 40
JEC COMPOSITES MAGAZINE - Issue #122 - July 2018 - Research - An aeronautics and space-oriented research group
JEC COMPOSITES MAGAZINE - Issue #122 - July 2018 - 42
JEC COMPOSITES MAGAZINE - Issue #122 - July 2018 - 43
JEC COMPOSITES MAGAZINE - Issue #122 - July 2018 - 44
JEC COMPOSITES MAGAZINE - Issue #122 - July 2018 - 45
JEC COMPOSITES MAGAZINE - Issue #122 - July 2018 - 46
JEC COMPOSITES MAGAZINE - Issue #122 - July 2018 - 47
JEC COMPOSITES MAGAZINE - Issue #122 - July 2018 - Sustainability - Agricultural waste for thermal and acoustic insulation in construction
JEC COMPOSITES MAGAZINE - Issue #122 - July 2018 - 49
JEC COMPOSITES MAGAZINE - Issue #122 - July 2018 - 50
JEC COMPOSITES MAGAZINE - Issue #122 - July 2018 - 51
JEC COMPOSITES MAGAZINE - Issue #122 - July 2018 - 52
JEC COMPOSITES MAGAZINE - Issue #122 - July 2018 - Recycling - Natural fibres and recycled rubber: new alternative solutions for composite panels
JEC COMPOSITES MAGAZINE - Issue #122 - July 2018 - 54
JEC COMPOSITES MAGAZINE - Issue #122 - July 2018 - 55
JEC COMPOSITES MAGAZINE - Issue #122 - July 2018 - Artistic vases - Art FRP, an innovation based on the Japanese traditional sense of beauty
JEC COMPOSITES MAGAZINE - Issue #122 - July 2018 - 57
JEC COMPOSITES MAGAZINE - Issue #122 - July 2018 - 58
JEC COMPOSITES MAGAZINE - Issue #122 - July 2018 - In the world
JEC COMPOSITES MAGAZINE - Issue #122 - July 2018 - Nanotubes - Conductive glass fibre products using single-wall carbon nanotubes
JEC COMPOSITES MAGAZINE - Issue #122 - July 2018 - 61
JEC COMPOSITES MAGAZINE - Issue #122 - July 2018 - 62
JEC COMPOSITES MAGAZINE - Issue #122 - July 2018 - Simulation - Optimizing the key manufacturing parameters of the AFP process
JEC COMPOSITES MAGAZINE - Issue #122 - July 2018 - 64
JEC COMPOSITES MAGAZINE - Issue #122 - July 2018 - 65
JEC COMPOSITES MAGAZINE - Issue #122 - July 2018 - Advertisers
JEC COMPOSITES MAGAZINE - Issue #122 - July 2018 - 67
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