Repair Composite Structures Flashcards Preview

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Flashcards in Repair Composite Structures Deck (18)
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1
Q

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

A potted compound repair

2
Q

What special precautions must be taken when repairing a radome?

A

Nothing must be done to the radome that will affect its electrical transparency or its aerodynamic strength

3
Q

How do you grind the point of a twist drill that is to be used for drilling transparent acrylic material?

A

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

4
Q

What is a warp clock in a structural repair manual?

A

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

5
Q

What are two advantages of laminated construction over riveted sheet metal?

A

Light weight and rigidity

6
Q

What are two popular types of core material used in laminated structure?

A

Foam and honeycomb

7
Q

What are two popular types of matrix material used in laminated structure?

A

Polyester and epoxy resins

8
Q

What are two parts of a polyester matrix material?

A

Resin and hardner

9
Q

What are two parts of an epoxy matrix material?

A

Resin and hardner

10
Q

What are two types of resins used in aircraft construction?

A

Thermoplastic and thermosetting

11
Q

What is necessary to cure a thermosetting resin?

A

Heat

12
Q

What are three materials that may be used to reinforce the matrix material for aircraft structure ?

A

Fiberglass, kevlar, and graphite

13
Q

What is meant by a unidirectional fabric?

A

A fabric in which all of the major fibers run in the same direction

14
Q

What is meant by the ribbon direction of a honeycomb material?

A

The direction in a piece of honeycomb material that is parallel to the length of the strips of material that make up the core

15
Q

What are two types of repair to a damaged honeycomb core composite material?

A

Room-temperature cure repair and hot-bonded repair

16
Q

What is meant by the shelf life of a material?

A

The normal length of time a material can be expected to keep its usable characteristics if it is stored and not used

17
Q

What is meant by the pot life of a resin?

A

The length of time a resin will remain workable after the catalyst has been added

18
Q

What document lists the safety hazards associated with resin used in composite structure?

A

The material safety data sheet for that resin

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