quick-fire poster presentations · 3 25 °c 105 °c liquid crystalline solutions (20.8- 23.6 wt.%,...
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Quick-Fire Poster Presentations
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Manufacturing Composites with DualStructural and Energy Storage FunctionsMark Turk
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This project is investigating the formability and manufacturability of composites when divided into structural power and purely structural areas.Forming simulationIdentify areas of high shear as a the ply is formed over the shape.
Segmenting multi‐ functional and structural areasAreas of high shear are designated as purely structural. Areas of low deformation and curvature are designated for energy storage.
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105 °C25 °C
Liquid Crystalline Solutions (20.8- 23.6 wt.%, Tc > 100- 105 °C)
Dry-jet Wet Fibre Spinning of Cellulose Fibres
• E (~42GPa) higher than most commercial cellulose fibres (Viscose ~9GPa, Lyocell ~15GPa, Cordenka ~17-32GPa, Ioncell-F ~34GPa).
V2V1
Air gap
Extruder Winding unit
Processing time ↓86%Production cost ↓30%Fibre properties ↑84%
Composites Manufacturing by HiPerDif Method
5 m
m
Output Prepreg Tape
Cellulose solution
Development of High Performance Regenerated Cellulose Fibres as Sustainable Reinforcing Fibres for CompositesC. Zhu, A. Koutsomitopoulou, M. Longana, S. Eichhorn, K. Potter
Fibre-watersuspension
vacuum
Dissolution of Cellulose in Ionic Liquid with DMSO as a Co-solvent
Dr Chenchen [email protected]
Specific E equal to E-glass fibres
Material Optimisation of Composite Coils for Negating Disturbances in MRI MagnetsJames McArdle, Kevin Potter, Jonathan Belnoue, M’hamed Lakrimi
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2.
The problem:
Methodology and approaches:
• Superconducting (zero resistance state) magnets quench (turn resistive) unpredictably
• Understanding material failure modes and their relationship with quench events
II. Optimisation approach. Parametric study, process modelling
I. Model development.Varying geometric features, inputs
III. Material selection. Employ selection based on analysis
Large-scale, high strain-rate Z-pinned composite delamination testAlex Cochrane, James Lander, Joel Serra, Stephen Hallett, Ivana Partridge
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• Z‐pins Z-pin fracture toughness enhancement only fully realised during large-scale bridging Current test methods do not produce large-scale bridging as insufficient scale; Gap in pyramid of testing.
Full structure
Subelement
Coupon
Component
Quasi-static single-pin, beamDynamic single-pin, beam
Large-scale dynamic impact
x
x
Fig 1: Pyramid of testing for composite componentaerospace certification
Figs 2(a): Finite element model of test design2(b): Side-view of real impact test
(a) (b)
• Textile Modelling Capabilities
Deformation Modelling of Textile Composites
A: Micro/meso‐scale digital element method
B: Meso‐scale 3D‐Shell method
Shell element (for out‐of‐plane behaviours) Membrane element (for in‐plane behaviours)
C: Marco‐scale Shell/membrane method
• Benchmarking Modelling Capabilities• Computational Cost• Level of details captured in single,
multiple layer(s) and 3D woven fabric• Fidelity in compaction, forming and
draping process simulationsMethod B
2D Woven Forming
Compaction of Multiple 2D Woven Layers
Method A
Method CMethod B
Xiaochuan (Ric) Sun, Adam Thompson, Bassam El Said, Stephen Hallett
Mechanical modelling of a sheared textile composite unit cellM. Song, A. Thompson, B. El-Said, D. Ivanov, S. R. Hallett
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Shear angle
Mechanical property (E.g. E22’)
0° 40° (max)
27GPa
34GPa
20°
Forming simulation
Look-up table
Fibre direction
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Fibre direction
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E11’
E22’
E11’ = 27.310 GPaE22’ = 27.837 GPa
E11’
E22’
E11’ = 13.387 GPaE22’ = 34.109 GPa
Directional properties
Region of high shear
1. Chemical composition
2. Rheology Analysis3. DSC Analysis
Cyanate esters
Novel ultrathin, radiation resistant nanocomposite structures for space applicationsMayra Yadira Rivera Lopez, Fabrizio Scarpa, Ian Hamerton
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4. FTIR Analysis5. Curing cycles
6. Future work
1stattempt
4thattempt
8thattempt
12thattempt
Mayra Yadira Rivera [email protected]
OligosiloxanesCatalysts
22/11/2018
ACCIS Conference 2018
Resonators in Periodic Media for a Vibroacoustic ControlMarc-Antoine Campana
My objectives
Objectives
Resonators
Unit Cell Floquet‐Bloch Theorem
Bandgap
NEW CORETOPOLOGIES
FOAM OR RESONATOR INSTERTS
+ =
ENGINEERED META‐SANDWICH
PANELS
KIRIGAMI
THERMOFORMING
FOLDING
METAMATERIAL
Kirigami Periodic Cores: Vibration filtering propertiesWant to know more aboutVIBRATION FILTERING
capabilities ofPERIODIC STRUCTURES
orKIRIGAMI?
Hybrid microbraids –Through thickness multifunctionalityCaroline O’Keeffe
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• Provide one or more functions beyond beneficial structural properties• Crack sensing as well as strengthening of structures simultaneously• In-service assessment of structures• Improve the safety and performance of structures
Multifunctional composite
Damage sensing
Conductivity Delamination resistance
Physical structural properties
12Effect of Processing Parameters on Quality of Thermoplastic Overmoulded CompositesMario A. Valverde, R. Kupfer, L. Kawashita, M. Gude, S. Hallett
0
250
500
750
1000
1250
1500
0.00
0.10
0.20
0.30
0.40
0.50
0.60
350 370
Forc
e (N
)
Def
orm
atio
n (m
m)
Preform heating temperature (°C)
Preform deformation Rib pull-off force
370 °C350 °C
• Overmoulded composites have high mechanical properties, high levels of geometric complexity and very low cycle times.
• Consolidation mechanics are poorly understood• CF-PPS ribbed plate was manufactured at varying process
temperatures and pressures at TU Dresden, Fig. 1.• Built custom test fixture for testing the bond force between ribs
• Increasing temperature improves bond strength, Fig. 2• Matrix-rich regions and higher preform deformation observed
at 370 °C compared to 350 °C, Fig. 3.
Fig. 2: Effect of pre-heating temperature on preform deformation and rib pull-off force
Fig. 3: Micrographs showing preform deformation for different heating temperatures
230
mm
Short-fibre CF-PPS (33% vf)
Continuous-fibre CF-PPS (59% vf)
Fig. 1: Overmoulded ribbed plate component
Questions??Please speak with the Presenters at their Posters
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