摘要
从熵守恒定律和能量守恒定律出发,推导出一个新的低周疲劳寿命预测能量模型,并以该模型为基础,对线性累积损伤法则进行了探讨,通过316L钢420℃环境下应力控制的低周疲劳实验,用该模型及基于该模型的线性累积损伤法则进行了低周疲劳寿命和剩余寿命的预测,预测结果与实测结果符合较好。
A new energy model for low cycle fatigue （LCF） life prediction was derived from the laws of entropy conservation and energy conservation. 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 was carried out by the new energy model and the principle of linear accumulation damage based on this model. The predicted results were compared with the experimental data, a good agreement is noted between the predicted and experimental results.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2006年第2期195-200,共6页
Acta Metallurgica Sinica
基金
国家科技攻关计划资助项目2001BA80380306~~
关键词
低周疲劳
熵守恒
能量守恒
应变能
累积损伤
low cycle fatigue, entropy conservation, energy conservation, strain energy, cumulative damage
