Store energy elastically; helical spring rate k=Gd⁴/8D³N.
Helical compression spring stiffness k=Gd⁴/(8D³N). Shear stress τ=K·8FD/(πd³) with Wahl factor K. Springs store energy ½kx² and can be in series or parallel. Fatigue and buckling are design concerns.
A suspension spring supports the car while allowing wheel travel.
Springs store energy and provide controlled force, so they are used in suspensions, valves, clutches and mechanisms.
Store energy elastically; helical spring rate k=Gd⁴/8D³N.
Springs store energy and provide controlled force, so they are used in suspensions, valves, clutches and mechanisms.
It is the force per unit deflection, k. A higher rate gives a stiffer spring.
Rate depends strongly on wire diameter and coil diameter, with the fourth and third powers, so small changes in geometry have large effects.
Typical applications include choosing a coil spring to hold a valve closed with a set force, designing a suspension spring for a given ride stiffness and specifying a compression spring for a spring-loaded latch.
Study "Bearings" first (topic 89 of 106 in Engineering Mechanics). It covers the groundwork this topic builds on.
Spring index C=D/d. Leaf, torsion, disc springs. Natural frequency (surge).
A suspension spring supports the car while allowing wheel travel.
The next topic is "Fasteners and bolted joints", which builds directly on this one.
It is classed as Advanced in Engineering Mechanics (topic 90 of 106). It is an advanced topic. It assumes you are comfortable with the intermediate topics in Engineering Mechanics.
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