Elastic Fatigue Definition - QS Study
QS Study

Elastic fatigue: It has been found from experiment that if successive increase or decrease of stress is applied on a body or a wire the corresponding strain does not occur instantaneously. Strain occurs slowly and elastic property of the body deteriorates. The temporary loss of elastic properties because of the action of repeated alternating deforming force is called elastic fatigue.

In this situation the body suffers slightly in fatigue. For this reason the wire may tear off for a weight less than the breaking weight. Famous scientist Kelvin called this property of matter Elastic fatigue. When you stretch a piece of material and allow it to return to its original shape multiple times, the molecules in the material start to deform and the bonds between them weaken. After a while, the material might break. This is elastic fatigue.