【摘要】 在两级或多级加载下 ,材料的蠕变寿命分数之和与加载顺序密切相关 ,这表明加载历史对损伤演变过程具有显著的影响。本研究采用考虑损伤和硬化影响的蠕变律 ,得到的蠕变损伤演变过程受加载历史的影响。讨论了两级蠕变加载时损伤演变和寿命估算问题。结果表明 ,本研究方法与试验结果吻合较好 ,可以反映加载效应的影响更多还原

【Abstract】 WT5BZ]The sum of time ratios is connected with creep loading order It means creep damage evolution is affected by loading history In present paper, creep law taking account of damage and hardening state was used to deduce the creep damage evolution equation, which includes loading history effect Damage evolution and remaining life under conditions of two level creep loading were discussed The result shows that proposed method of predicting remaining life coincides with experiment and can reflect loading order effect更多还原