关键词: 累积损伤, 疲劳寿命, 变形能, 应力和应变

Abstract: In the fatigue life prediction of engineering structure, Palmgrem-Miner linear accumulative damage theory (called Miner theory for short) has found the widest application, and Manson-Coffin formula is a very important strain-life expression used in the local strain method. The verification of Miner theory and Manson-Coffin formula is done in this paper based on lots of strain energy-life experimental data The relationship between Miner theory and Manson-Coffin formula is found. A new prediction method of material behavior parameters for strain fatigue is built on some results from this paper, which shows that it is better than the other existing methods for predicting material behavior parameters.

Key words: accumulative damage, fatigue life, strain energy, stress and strain