research topics in composite materials @ ita · 1 instituto tecnológico de aeronáutica prof....
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Instituto Tecnológico de Aeronáutica
Prof. Maurício Vicente Donadon
Instituto Tecnológico de AeronáuticaDepartment of Aeronautics
Research Topics in Composite Materials @ ITA
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Instituto Tecnológico de Aeronáutica
Research Areas
Manufacturing Processes
Mechanical & Physical
Characterization
Simulation in Composites Nanocomposites Smart Composites
Experimental Techniques RecyclingWind Turbines
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Instituto Tecnológico de Aeronáutica
COMPOSITE MATERIALS-RESEARCH TOPICSManufacturing processes
RTM RIFT
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Instituto Tecnológico de Aeronáutica
COMPOSITE MATERIALS-RESEARCH TOPICSManufacturing processes
RIFT/RTM PROCESSESCLEAN ROOM ISO 10000
Resin infusion stacking
Mould filling simulation
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Instituto Tecnológico de Aeronáutica
COMPOSITE MATERIALS-RESEARCH TOPICSMechanical & Physical Characterization
In-plane ply properties
Fracture Toughness Characterization
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Instituto Tecnológico de Aeronáutica
COMPOSITE MATERIALS-RESEARCH TOPICSSimulation in Composites
Intralaminar failure modes Interlaminar failure (Delamination)
Fatigue induced damage
GI/GIc
Da/
DN
(mm
/cyc
le)
0.2 0.3 0.4
10-6
10-5
10-4
10-3
ExperimentalNumerical
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Instituto Tecnológico de Aeronáutica
COMPOSITE MATERIALS-RESEARCH TOPICSSimulation in Composites
Life prediction/Durability
maxF
minF
F
maxF
minF
F
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Instituto Tecnológico de Aeronáutica
COMPOSITE MATERIALS-RESEARCH TOPICSSimulation in CompositesMicromechanics - Asymptotic Homogenization
Fibre +
Matrix +
Interface Properties
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Instituto Tecnológico de Aeronáutica
COMPOSITE MATERIALS-RESEARCH TOPICSSimulation in Composites
LV Impact Induced Damage CAI Strength Prediction
Bird-Strike
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Instituto Tecnológico de Aeronáutica
COMPOSITE MATERIALS-RESEARCH TOPICSSimulation in Composites
Buckling, Postbuckling & Collapse (Fiber-Metal Laminates)
Experiment FE Prediction
Ballistic Impact Dynamics
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Instituto Tecnológico de Aeronáutica
Ballistic Impact Dynamics
COMPOSITE MATERIALS-RESEARCH TOPICSSimulation in Composites
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Instituto Tecnológico de Aeronáutica
COMPOSITE MATERIALS-RESEARCH TOPICSSimulation in Composites
Topological and Parametric Optimization of Stiffened Composite Panels for Aeronautical Applications
Laminate with N layersm possible orientation angles: 1, 2, …, m
Each ply k may assume m values for k
A laminate is defined by 0 = {10 20 … N0} and its lamination parameters 0For another laminate one has = {1
A 2A … 3
D 4D 5
A 6A}
Objective function f = f()
T
AADDAA
ffffff
654321
s
)()()(~00 ξξsξξ Tff
)( 0ξξs Tf Maximizef with restricted to lie in the feasible region.Searching all the mN possibilities is not doable
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Instituto Tecnológico de Aeronáutica
COMPOSITE MATERIALS-RESEARCH TOPICSSimulation in Composites
Topological and Parametric Optimization of Stiffened Composite Panels for Aeronautical Applications
Ns0
Nx0
x
y
z
clamped
laminate 1
laminate 2
Nxy0
Nx0
Ny0y
z
w = 1.5 m
l = 1 m
hs = 0.1 m
wb = 0.1 mNx0
Ns0
clamped edge
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Instituto Tecnológico de Aeronáutica
COMPOSITE MATERIALS-RESEARCH TOPICSSimulation in Composites
Structural synthesis for prescribed frequencies and mode shapes
• The need to advance in algorithms to deal with target mode shapes in the optimization process. • This inverse problem is of great interest for the synthesis under aeroelastic constraints or model
updating algorithms (based on modal test data).• Proposed method (without eigenvector derivatives) is under study for the joined wing aircraft.
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Instituto Tecnológico de Aeronáutica
Simulation in CompositesAero acoustic scattering by finite composite plates
COMPOSITE MATERIALS-RESEARCH TOPICS
Sound source
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Instituto Tecnológico de Aeronáutica
COMPOSITE MATERIALS-RESEARCH TOPICSNanocomposites
RTM Setup for Nanostructured composite manufacturing
CVD reactor @ INPE
CNT growth on the fabric surface
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Instituto Tecnológico de Aeronáutica
COMPOSITE MATERIALS-RESEARCH TOPICSSmart Composites
Piezoelectric & Viscoelastic materials applied to natural
frequencies, buckling load and flutter control
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Instituto Tecnológico de Aeronáutica
COMPOSITE MATERIALS-RESEARCH TOPICSWind Turbines
• Development of numerical tools for steady & unsteady aerodynamic/aeroelastic analyses of wind turbines;
• Blade design optimization
Vibration
Buckling
Progressive failure
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Instituto Tecnológico de Aeronáutica
COMPOSITE MATERIALS-RESEARCH TOPICSWind Turbines
• Development & validation of similarity rules for wind tunel testing
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Instituto Tecnológico de Aeronáutica
COMPOSITE MATERIALS-RESEARCH TOPICSExperimental Techniques
Combined Shear-Bending Post-buckling Post-buckling due to shear loading
Post-buckling/Crippling in compression
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Instituto Tecnológico de Aeronáutica
COMPOSITE MATERIALS-RESEARCH TOPICSExperimental Techniques
Drop test tower – Impact tests
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Instituto Tecnológico de Aeronáutica
Split Hopkinson Pressure Bar testing apparatus – Strain rate effects/HVI
•Incident/transmitted bars dimensions: 2m, Ф1”.
•Striker : 0,3m , Ф1”. Aluminum Pulse shaper used;
•Bar material : Carbon Steel /Aluminum alloy 7075T651
•Specimen dimensions ( b x h x L) : 15mm x 10mm x 10mm
COMPOSITE MATERIALS-RESEARCH TOPICSExperimental Techniques
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Instituto Tecnológico de Aeronáutica
HVI/Ballistic impact setup – Gas-gun
COMPOSITE MATERIALS-RESEARCH TOPICSExperimental Techniques
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Instituto Tecnológico de Aeronáutica
CAI test rig for plates & shells
COMPOSITE MATERIALS-RESEARCH TOPICSExperimental Techniques
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Instituto Tecnológico de Aeronáutica
Aging & Environmental Effects
COMPOSITE MATERIALS-RESEARCH TOPICSExperimental Techniques
DCB at -54 0CTemp./Humidity & Thermal Shock Chambers
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Instituto Tecnológico de Aeronáutica
COMPOSITE MATERIALS-RESEARCH TOPICSComposites Recycling
Schematic diagram of the pyrolysis reactor
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Instituto Tecnológico de Aeronáutica
COMPOSITE MATERIALSResearch Collaboration Topics
1) Topological and Parametric Optimization of Stiffened Composite Panels for Aeronautical Applications;
2) Co-cured, co-bonded and secondary bonding composite joints;
3) Repair of Aeronautical Composite Structures;
4) Hygro-Thermo-Mechanical Fatigue of Composite Structures;
5) Impact resistance and damage tolerance of aeronautical composite panels;
6) Buckling, post-buckling and collapse of composite stiffened panels (static & dynamic (crushing))
7) Smart materials applied to aeroelasticity of composite panels (passive/active)
8) Progressive failure analysis of composite structures (multi-scale modeling)
9) Sustainable recycling processes applied to aeronautical composite structures
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Instituto Tecnológico de Aeronáutica
COMPOSITE MATERIALSResearch Collaboration Topics
10) Sandwich structures:
Local & Global Buckling;
Static & Dynamic Responses;
Uncertainties quantification & validation;
Fatigue.
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Instituto Tecnológico de Aeronáutica
THANK YOU
Questions?
www.lnca.ita.br
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