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Composites > Composite Basics MS-126 > Flashcards

Composite Basics MS-126 Flashcards

1
Q

What is a composite material?

A

Two or more chemically distinct materials, when combined have improved properties over individual materials. Composite could be natural or synthetic.

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2
Q

Composites are combination of two materials in which one of the material is called the _______ ________.

A

reinforcing phase

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3
Q

In the form of fibers, sheets or particles and is embedded in the other material is called the _____ -______.

A

matrix phase

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4
Q

Typically, ____ ______ are strong with low densities while the matrix is usually a ductile or tough material.

A

reinforcing material

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5
Q

______ _____ is two inherently different materials that when combined together produce a material with properties that exceed the constituent materials.

A

composite material

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6
Q

Typically, reinforcing materials are strong with low densities, while the matrix is usually a ____ or _____ material.

A

ductile or tough material

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7
Q

If composite is designed and fabricated correctly, it combines the strength of the reinforcement with the toughness of the ____ to achieve a combination of desirable properties not available in any single conventional materials.

A

matrix

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8
Q

Glass, Carbon, organic, boron, ceramic, metallic are all ____ ____.

A

reinforcement fibers

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9
Q

polymers, metal, ceramics are all ____ ______.

A

matrix materials

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10
Q

bonding surface is _____.

A

interface

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11
Q

weight of aramid fibers are the lightest at ___ -____ g/cc

A

1.3-1.4 g/cc

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12
Q

carbon _____ g/c

A

1.79 g/cc

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13
Q

Fiberglass is the heaviest ____ g/cc.

A

2.4 g/cc

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14
Q

strength carbon is is the strongest at ____ - ____ ksi

A

600-800 ksi

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15
Q

Fiberglass ____ - ____ ksi

A

400-600 ksi

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16
Q

aramids _____ ksi

A

400 ksi

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17
Q

Impact resistance Kevlar is the _____. Next is fiberglass, then carbon.

A

toughest

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18
Q

Carbon is the stiffest at ___ - ____ msi

A

30-40 msi

19
Q

Aramid stiffness __ msi

A

14 msi

20
Q

Fiberglass stiffness ___ -___ msi

A

10-13 msi

21
Q

_____ is cost effective

A

fiberglass

22
Q

______ is the least cost effective.

A

carbon

23
Q

Series of interlaced yarns at 90 degrees to each other

A

woven

24
Q

series of interloped yarns

A

knit

25
Q

series of intertwined, spiral yarns

A

braided

26
Q

oriented fibers either mechanically, chemically, or thermally bonded

A

nonwoven

27
Q

___ goes longitudinal

A

End

28
Q

___ goes horizontal

A

pick

29
Q

X axis _____ ____>

A

fill direction

30
Q

Y axis ____ _____

A

warp direction

31
Q

Plain weave offers ____ _____, and ______ _____

A

fabric integrity, and dimensional stability

32
Q

satin 5hs weave offers ___ ____ and _____ _____ of fiber properties.

A

smoother face, improved translation of fiber properties

33
Q

2x2 Twill weave offers

A

excellent drape-ability, conformity

34
Q

non-crimp weave offers

A

minimum crimp in yarns, dimensional stability

35
Q

A ___ consists of two sets of yarn, which are hectically intertwined. Resulting structure is oriented to the longitudinal axis of the ___.

A

brain

36
Q

Types of braids

A

diamond brain, regular brain, Hercules braid

37
Q

A system of longitudinal yarns can be introduce which are held in place by the braiding yards. These yarns will ad dimensional stability, improve tensile properties, stiffness, etc. What am I?

A

triaxial yarns

38
Q

concept of composites is that the load is applied over a larger surface area of the _____.

A

matrix

39
Q

matrix then transfers the load to the _______, which being stiffer, increases the strength of the composite.

A

reinforcement

40
Q

about ____ % of all composites are produced are comprised of glass fiber and either polyester or vinylester resin.

A

90

41
Q

_____ ____ composites offer higher modulus of elasticity, ductility and resistance to elevated temperatures than polymer matrix. but are heavy and difficult to process.

A

metal matrix

42
Q

____ matrix composites are used in applications where resistance to high temp and corrosive environment is designer CMC are strong and stiff by they lack toughness.

A

ceramic matrix composites

43
Q

____ are heterogeneous

A

composites

44
Q

____ are highly anisotropic

A

composite

Composites (7 decks)

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