Composits

Question 1

What are the two types of composites materials

Answer 1

Reinforcing
Matrix

Question 2

What does reinforcing materials consist of

Answer 2

Tapes, woven into fabric, or grouped together into a loosely compacted mat

Question 3

What are the three types of reinforcing materials

Answer 3

Fiberglass
Kevlar
Graphite

Question 4

What are the two types of fiberglass

Answer 4

S glass
E glass

Question 5

How are fiberglass materials made of

Answer 5

Drawn from molted glass and spun together and woven into shiny, white cloth

Question 6

What is Kevlar

Answer 6

Used to replace fiberglass. Strength of a similar metal part and is lighter weight

Question 7

What is an advantage of Kevlar

Answer 7

Flexibility under a load and ability to withstand impact, shock, and vibration

Question 8

What is graphite

Answer 8

A form of carbon. Structural graphite is used in composite structures because of strength and stiffness

Question 9

Where is graphite used

Answer 9

Primary structures where high strength and rigidity are prime considerations

Question 10

Can graphite be bonded over aluminum

Answer 10

Yes but use with caution

Question 11

How do you improve the strength of fibers

Answer 11

Take the grain and turn it 45 degrees and 90 degrees

Question 12

What are the two types of fiber directions

Answer 12

Unidirectional
Bidirectional

Question 13

What is a unidirectional fabric

Answer 13

All the threads run the same way aka warp direction and have small cross threads running across them

Question 14

What is fill threads

Answer 14

Used to hold the unidirectional warp pieces together 

Question 15

What is bidirectional fabrics

Answer 15

Interlaced fill threads with the warp threads as the fabric is being woven into looms

Question 16

What is a hybrid fiber

Answer 16

A fiber composed of different types of fibers woven together to obtain special characteristics

Question 17

What is one of the most common hybrid fibers

Answer 17

Kevlar and graphite

Question 18

What is matrix

Answer 18

Material used in composite construction to bind the fibers together and to transmit the forces into the fibers.

Question 19

What is a common matrix

Answer 19

Resin

Question 20

What are the two basic types of resins

Answer 20

Thermoplastic
Thermosetting

Question 21

How does thermoplastic resins work

Answer 21

Heat is used to shape the component and then when cools it take the shape it was formed to

Question 22

How does thermosetting work

Answer 22

It uses heat to cure the part to take its shape form.

Question 23

What are the two types of thermosetting resins

Answer 23

Polyester
Epoxy

Question 24

What is polyester resins typically used with

Answer 24

Fiberglass

Question 25

Where does polyester resin typically used

Answer 25

They are used on non structural components and are low cost

Question 26

What are the parts that make up a polyester resin

Answer 26

Resin Catalyst

Question 27

What does epoxy resin use

Answer 27

Resin Catalyst

Question 28

What is pre impregnated materials

Answer 28

A type of composite material in which the reinforcing fibers are encapsulated in an uncured resin

Question 29

What is an adhesive

Answer 29

A resin that is used to bond parts together

Question 30

What is an adhesive made up of

Answer 30

Catalyzed resin that is formed into a thin film

Question 31

How is adhesive cured

Answer 31

By heat and pressure

Question 32

What is foaming adhesives used for

Answer 32

Bond sections of honeycomb core

Question 33

What are the two basic types of foam used in aircraft structures

Answer 33

Styrofoam Urethane

Question 34

How is styrofoam cut

Answer 34

By the use of a hot wire cutter

Question 35

What is an advantage of urethane foam

Answer 35

It is fuel proof

Question 36

How is urethane foam cut

Answer 36

A sharp knife or scissors

Question 37

What type of resin are used with styrofoam

Answer 37

Epoxy

Question 38

What types of resin can be used with urethane foam

Answer 38

Either epoxy or polyester

Question 39

Where is honeycomb most likely used at

Answer 39

High performance applications

Question 40

What type of stress is put on the honeycomb

Answer 40

Compressive

Question 41

What is ribbon direction

Answer 41

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

Question 42

What is a filler

Answer 42

Used to change the resin into a syrup or paste

Question 43

What is the most common type of filler

Answer 43

Micro balloons

Question 44

What are the three ways to apply heat and pressure

Answer 44

Matched dies Vacuum bag Autoclave

Question 45

What is an autoclave

Answer 45

A pressured vessel inside of which air can be heated to a high temperature and pressure raised to a high value.

Question 46

What do you use to make repairs and inspections on composite materials

Answer 46

Structural repair manual

Question 47

What is delamination

Answer 47

The separation of the layers of a laminated material

Question 48

What are ways to find delamination

Answer 48

The coin tap test X ray Ultrasonic inspection Back lighting

Question 49

What is an indication of delamination

Answer 49

A dull thud

Question 50

What are the two types of cures for repairing composites

Answer 50

Room temp cure Hot temp cure

Question 51

What is a warp clock used for

Answer 51

Shows the orientation of the plies of a composite material

Question 52

What is a parting film

Answer 52

A layer of thin plastic material placed between a composite lay up and the heating blanket. It prevents the blanket from sticking to the fabric

Question 53

What is a bleeder used for

Answer 53

It absorbed the excess resin forced out by ply fibers

Question 54

How do u drill graphite

Answer 54

Spade drill

Question 55

What is some typical safety procedures when dealing with composites

Answer 55

Use a respirator Safety glasses Wear latex gloves