Phương pháp đo tổn thất năng lượng của mẫu thí nghiệm mỏi

Tóm tắt

The energy dissipated per cycle is one of the mechanical properties of steel matrials. In order to determine the energy dissipated per cycle of the materials, we can use several methods. The hysteresis loop method is the most common method for evaluating the energy dissipated of the materials. The hysteresis loop area is equal to the energy dissi- pated per cycle of the materials. The procedure of this method is presented in this paper. The hysteresis loop has been related to the material fatigue, so we applied this method to measure the energy dissipated of the steel fatigue samples. The experimental results show that the energy dissipated of the samples varies with the number of fatigue cycles. These results are used to predict fatigue lifetime of the structural materials, machine parts.