摘要
通过316L钢在420℃环境下应力控制的低周疲劳实验,基于连续损伤力学,提出一种新的低周疲劳损伤模型,采用 间接反映循环塑性应变能的应力-位移曲线面积的变化作为损伤变量,实验结果与该模型显示的疲劳损伤演变规律符合较好.
By low cycle fatigue (LCF) experimentation of 316L steel under stress control at elevated temperature, based on the continuum damage mechanics (CDM) theory, a new low cycle fatigue damage model is established. The variety of the stress-displacement curve area is selected to be the damage variable instead of the plastic strain energy per cycle. This damage variable is measured during the stress-controlled LCF experimentation to verify the new LCF damage model, which is in good agreement with the results.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2005年第2期157-160,共4页
Acta Metallurgica Sinica
基金
国家科技攻关计划资助项目2001BA803B0306
关键词
低周疲劳
连续损伤力学
塑性应变能
应力-位移曲线
损伤变量
low cycle fatigue
continuum damage mechanics
plastic strain energy
stress-displacement curve
damage variable
