Knowledge of composite materials

Programme

• Definition of composites
• Use in aeronautics

 Materials

Reinforcements

• generalities
• types of reinforcements
• lens
• carbon
• kevlar
• diverse
• synthetic fibres
• ceramics
• metallic fabrics
• physico-chemical bond
• presentment
• wire
• (matt)
• UD
• multiaxial
• fabric
• intricate

The matrix

• generalities
• (polyester / vinylester)
• epoxy
• phenolic
• polyimide

 

Thermoplastic composites

Prepregs

Modification of resin properties: fillers

• Minerals
• Silicates
• Nanotubes

Core materials (sandwich structures)

• honeycomb (alu & Nomex)
• foams
• PVC
• PU
• polystyrene
• PMI
• Termination modes
• The inserts

Methods of implementation

• introduction
• contact casting
• filament winding
• vacuum casting
• technologies
• appurtenances

Resin Transfer Moulding

• (low pressure injection)
• brewing
• RFI
• Prepregs
• Low pressure
• High pressure autoclave
• prepregs cutting
• cooking and post-cooking

MC Plans

• reading of MC plans

Synthesis – Practical example on aeronautical parts

• summary – practical example
• applications on parts and ranges
• applications on supplier data sheets
• Mechanical characteristics of laminates

Standardized tests – method

• traction
• compressing
• bending
• shearing
• twisting
• peel drum test
• HDT
• influence of the working method on the results

Peripherals

• releasing agents
• furnace, vacuum pump etc.

 

Mould making techniques

• single moulds
• moulds with integrated heating
• carbon molds
• metal molds

Machining and finishing of parts

Technologies for assembling and bonding composite materials

• General information on assemblies
• The collage

Introduction

• types of adhesives
• Surface treatments
• Implementation
• Gluing joint design and calculation
• Controls

 

Aerospace Applications

• Airbus : slats trailing edge
• Other parts depending on availability

 

Structural repairs

 

– Composite defects

• in a laminate
• in a collage

– Monitoring and diagnostic methods

• visual analysis
• shock / vibration analysis
• ultrasound

– Methods of repair

• identification of materials and processes
• part preparation
• material preparation
• reparation

– Types of repairs

• mechanical assembly
• glue assembly
• resin or glue injection
• in situ stratification

– AC 43.13-1A 1987

– Applications

• depending on the available material

Quality control

• Dassault Aviation procedure
• AC 21-26
• Quality Control for the Manufacture of Composite Structures
• Reading and comments

Miscellaneous

• AC 20-107A
• Composite Aircraft Structure
• Reading and comments

Safety and health

Automated fiber placement