Springs Flashcards
1
Q
Plain end actual no. of coils
A
n, effective no. of coils
2
Q
Ground end actual no. of coils
A
n
3
Q
Squared end actual no. of coils
A
n+2
4
Q
Squared and ground end actual no. of coils
A
n+2
5
Q
Plain end solid length
A
(n+1)d
d=diameter of the wire
6
Q
Ground end solid length
A
nd
7
Q
Squared end solid length
A
(n+3)d
8
Q
Squared and ground end solid length
A
(n+2)d
9
Q
Plain end free length
A
np+d
p=pitch
10
Q
Ground end free length
A
np
11
Q
Squared end free length
A
np+3d
12
Q
Squared and ground end free length
A
np+2d
13
Q
Solid and free length coil order (0,1,2,3)
A
Ground, plain, squared and ground, squared
14
Q
Torsional shear stress in spring wire, Ss
A
Ss = K(8FDm/πd³)
15
Q
Spring mean diameter, Dm
A
- (Do+Di)/2
- Do - d
- Di + d
- Do = outside diameter of spring
- Di = inside diameter of spring
- d = wire diameter
