6.7 Flashcards

(58 cards)

1
Q

What is Elasticity

A

Absorbing Energy and returning to original position without fracture

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2
Q

What force does a Helical Compression Springs Resist

A

Compressive Forces

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3
Q

What stresses are Helical Compressive Springs under

A

Torsion Forces

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4
Q

Can a compression spring be over stressed

A

No

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5
Q

What are Plain Ends

A

Chopped at length

Large Index

Used for Light Duty Applications

Used in Compressive Springs

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6
Q

What is Index

A

Ratio of Wire Diam and Mean Diam

Tightness of Compression Spring Coils

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7
Q

What are Closed Ends

A

Ground End with Extra Turns at the end

Used in Compressive Springs

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8
Q

What are Ground Ends

A

Flat End

Uniform Load Distribution

Used in Compressive Springs

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9
Q

Where is the Larger Diam in Barrell Comp String

A

In the Middle

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10
Q

What ends are on Barrell Convex Comp Spring

A

Closed Ends

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11
Q

What is the benefit of Barrel Springs

A

Less likely to bend under load

Allows for springs to be made longer

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12
Q

Where is the smaller Diam in Cone Comp Springs

A

At one end

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13
Q

What is the benefit of Cone Comp Springs

A

Loads to be achieved at lower Heights

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14
Q

Where is the Smaller Diam in Hourglass Comp Springs

A

In the Middle

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15
Q

What is the benefit of Hourglass Comp Spring

A

Lowered Solid Height

Improved Stability

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16
Q

What forces to Tension Springs Resist

A

Tension

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17
Q

What stresses are Tension Springs under

A

Torsion Stresses

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18
Q

Can Tension Springs be over stressed

A

Yes

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19
Q

What ends are used on Tension Springs

A

Hooked or Looped

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20
Q

What ends are used on Compression Springs

A

Plain

Ground

Closed

Contra Wound

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21
Q

What spring is more likely to fail due to fatigue

Compressive or Tension

A

Tension

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22
Q

Where are Spring Rods used

A

In place of Tension Springs in Safety Critical Areas

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23
Q

Spring rods use what kind of spring

A

Compressive Spring acting as a Tension Spring

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24
Q

What forces to Helical Torsion Springs Resist

A

Torsion Forces

25
What stresses are Torsion Springs subjected to
Bending Stresses
26
Where are Torsion Spring Rods Used and for what purpose
In flight controls For Deflection Proportion
27
Where are Coned Disk / Bellnell Springs used
In Compression with Limited Space
28
A flat spring is a
Leaf spring with only one flex component
29
What is Boyles Law in relation to Pneumatic Springs
Reducing Volume = Increases Pressure
30
How do Pneumatic Springs Dampen Motion
Motion to Pressure to Heat
31
Where are Liquid Springs Used
For Shock Absorbers in Landing Gear
32
How do Liquid Springs Dampen
Pressure to Heat
33
Where are Elastomeric Springs used
Rubber Block Between 2 Compents
34
Characteristic of Carbon Spring Steel
Strongest of the 3 materials used Corrodes Easily
35
What is Max Op Temp of Carbon Spring Steel
150 °C
36
What colour / finish is on Carbon Spring Steel
Shiney
37
Characteristics of Stainless
3rd Strongest High Corrosion Resistance
38
What is Max Op Temp of Stainless Steel in Springs
300 °C
39
What colour or finish is on Stainless steel springs
Yellow
40
What are characteristics of Inconel X750
Second Strongest High temp resistance
41
What is max op temp of InconelX750
550 °C
42
What colour or finish has InconelX750
Brown
43
When are steels Cold Wound
Below 9.5mm and 18.5mm
44
When are steels Hot Wound
Above 9.5mm to 18.5mm
45
What Materials are Cold Rolled
Carbon And Manganese Alloys
46
What Non Ferrous Metals are used to make Springs
Copper Alloys Nickel Alloys Composite
47
What is Pitch
Gap between Rings
48
What is Wire Diameter
Width of Rings / Material
49
What is Measurement Diam
Center of Ring to Ring
50
What is the Ratio of Mean Coil
Coil Diam : Wire Diam
51
What is Spring Rate
Change in Load per Unit of Deflection (lbs/in or N/mm)
52
Linear springs
Obey hooks law
53
What is Hooks Law
Stress is directly proportional to Strain
54
What is a Regressive Spring
Load is less than Deflection
55
What is Progressive spring
Load is greater than Deflection
56
Compression Linearity Depends on
Spring Diam Wire Diam Pitch Overall Length
57
Tension Linearity Depends on
Spring Diam Overall Length
58
What Is a loaded height
Height of a spring when a load is present