Design of a Helical Extension Spring
Design of a Helical Extension Spring
According to Hooke's law, , the restoring force of an extension spring is proportional to its linear extension .
F=kΔL
F
ΔL
The value is the spring constant and depends on the design parameters as follows: [1]. Here is the diameter of the coil, is the diameter of the wire, is the number of active windings, and is the shear modulus of the material.
k
k=
μ
4
d
8n
3
D
D
d
n
μ