Abstract
Springs are energy-absorbing units whose function is to store energy and to release it slowly or rapidly depending on the particular application. In motor vehicle applications, the springs act as buffers between the vehicle itself and the external forces applied through the wheels by uneven road conditions. In such cases, the shock loads are converted into strain energy of the spring and the resulting effect on the vehicle body is much reduced. In some cases, springs are merely used as positioning devices whose function it is to return mechanisms to their original positions after some external force has been removed. From a design point of view “good” springs store and release energy but do not significantly absorb it. Should they do so then they will be prone to failure. This chapter provides strain energy formulae and suggests that the reader should become familiar with the equations involved. It also provides equations for closed-coiled springs: under axial load, under axial torque, and open-coiled springs.
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