Repair Composite Structures Flashcards
What kind of repair can be made to a small damage of the core material and one face sheet of a piece of aluminum alloy honeycomb structure?
A potted compound repair
What special precautions must be taken when repairing a radome?
Nothing must be done to the radome that will affect its electrical transparency or its aerodynamic strength
How do you grind the point of a twist drill that is to be used for drilling transparent acrylic material?
The cutting edge should be dubbed off to a zero rake angle, and the included angle of the tip should be ground to 140 degrees
What is a warp clock in a structural repair manual?
An alignment indicator to show the orientation of the plies of a composite material. The ply direction is shown in relation to a reference direction
What are two advantages of laminated construction over riveted sheet metal?
Light weight and rigidity
What are two popular types of core material used in laminated structure?
Foam and honeycomb
What are two popular types of matrix material used in laminated structure?
Polyester and epoxy resins
What are two parts of a polyester matrix material?
Resin and hardner
What are two parts of an epoxy matrix material?
Resin and hardner
What are two types of resins used in aircraft construction?
Thermoplastic and thermosetting
What is necessary to cure a thermosetting resin?
Heat
What are three materials that may be used to reinforce the matrix material for aircraft structure ?
Fiberglass, kevlar, and graphite
What is meant by a unidirectional fabric?
A fabric in which all of the major fibers run in the same direction
What is meant by the ribbon direction of a honeycomb material?
The direction in a piece of honeycomb material that is parallel to the length of the strips of material that make up the core
What are two types of repair to a damaged honeycomb core composite material?
Room-temperature cure repair and hot-bonded repair
