Abstract
The fatigue life estimation of structural components is one of the most interested subjects in engineering fatigue research. There exists complex energy phenomenon in the fatigue damaging process. Further studies shows that energy index has many advantages in describing the fatigue behavior of materials, while the development of the energy-based fatigue theory is very limited. In this paper, a new irreversible-energy-based method based on experimental regularity was lead in to consider the influence of the stress level and temperature on the accumulated damage process. At the end of the paper, the method was implemented with the experimental data, damage model and finite element technology on quenched and tempered low-alloyed material 30Cr2MoV. A little example was given to verifying the validity of the method with traditional life assessing method.
