Abstract

The energy loss per cycle due to hysteresis is one of the criteria for evaluation the working state of an electro-mechanical system. To investigate the influence of the fatigue on the energy loss per cycle due to hysteresis, we manufactured and performed many experiments on the electro mechanical system. The experimental results reveal that the energy loss per cycle increase versus the fatigue cycles of the steel speciment AISI 1045. This is used for evaluation the working life, diagnosing the fatigue state of the specimen or rotating shaft.