Composites in Aircraft Structures
Who should attend:
Aircraft Structural Engineers, Airline
and Helicopter Maintenance Engineers and Senior Technicians, Design
Engineers,
Civil Aviation Administrators.
- Introduction
Why Composites? Reinforcement Optimization Aircraft Weight, Thermal
and Stiffness Properties Fatigue Resistance
- Fibers
Glass Graphite Aramid Boron Alumina Asbestos
Grades, Strengths, Surface Treatments, Physical, Chemical, Fatigue & Impact
Properties
- Resins
Epoxy Maleimide Phenolic Polyimide Thermosetting and Thermoplastic
Systems
- Joining
Bonded Joints: Surface Preparation and Adhesive Selection, Wettability
and Bonding, Configurations, Single-lap, Double-lap, Stepped-lap,
Scarf Joints Mechanically Fastened Joints: Fastener Selection,
Hole Preparation, Lay-up and Stacking Sequence, Joint Dimensions,
Design Considerations
- Environment
Temperature Effects, Corrosion, Moisture Ingression, Thermal
Spike, Hygrothermal Aging, Weathering, Erosion, Lightning,
Stress Corrosion, Blistering
Case Studies: Westland Sea King & WG.30 Helicopters, Boeing 737
Spoiler, Lockheed L-1011 Fairing, Douglas DC-10 Rudder & Aft
Pylon, C-130 Wing Box, CH-54 Fuselage, USAF F-15, A-7D, F-111,
US Navy F-14 Horizontal Stabilizer, H-46 Rotor Blades
- Design, Applications
Mechanism of Reinforcement, Structural Sandwich Systems, Transport
and Fighter Aircraft, Propeller Blades, Helicopter Blades,
Jet Engines.
Case Studies: Gossamer Albatross, Boeing-Vertol Rotor Blades,
Beech Starship
- Micro/Macro Mechanisms
Isotropic and Orthotropic Laminae, Micromechanical Analysis of
Continuous Fiber and Discontinuous Fiber Laminae, Laminated
Beams and Plates, Interlaminar Stresses and Edge Effects
- Damage, Fracture
Failure Criteria, Debonding, Fiber Pullout, Delamination, Matrix
Cracking, Toughness Enhancement of Matrices, Damage-based Strength
Model, Failure Mechanisms and Toughness Maps, Fatigue Damage
Mechanics and Lifetime Prediction, Variable Amplitude Loading
Effects
- Defects, Testing, Quality Control
A List of Defects, Material Quality Revalidation, BVID (Barely
Visible Impact Damage), Visual Inspection, Tap Test, Through
Transmission and Pulse-Echo Ultrasonics, Dry-coupled Roller
Probes, Air-coupled Probes, Ultrasonic Spectroscopy, SIAM R-theta
System, X-ray Radiography, Eddy Current, Neutron Radiography,
Acoustic Emission, Mechanical Impedance Testing, Thermography
Case Study: Automated Ultrasonic Inspection System for In-service
CF-18
- Repair
Bonded vs. Bolted Repairs, Combined Bolted/Bonded Repairs, Adhesive
Testing, Surface Treatments, Anodizing, Special Considerations
in Skin Repairs, Life Prediction, Crack Patching, Mirage III
Lower Wing Skin Case Study, Thermal Analysis, The Airworthiness
Patch, Crack Growth, Relative Hot/Wet Strengths of Various
Repair Configurations
Case Study: US Navy H-46 Composite Rotor Blade Repair, YAV-8B Composite Wing
Skin Repair, S-3A Spoiler, F-4J Doors, L1011 Fin, AH-1 Rotor Blade, Mirage
III Lower Wing Skin.
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