Abstract The laws of entropy conservation and energy conservation are applicable to any system. In this paper, a new energy model for low cycle fatigue (LCF) life prediction has been derived from the above two laws. Based on this model, an investigation of cumulative damage was also accomplished. By low cycle fatigue experiment of 316L steel under stress control at 420℃, the prediction of fatigue life and residual life has been carried out by the new energy model and the principle of linear accumulation damage based on this model. The predicted results have been compared with the experimental data. A good agreement is noted between the predicted and experimental results.
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