摘要
为验证Manson-Coffin低周疲劳模型经验公式,采用损伤力学基础理论,并结合Ramberg-Osgood幂率强化准则,以塑性应变幅值为损伤演化的控制量,推导建立了低周疲劳损伤力学模型。比较两者后可得:在比例载荷的条件下,Manson-Coffin低周疲劳模型与疲劳损伤力学模型是等价的,且Manson-Coffin公式是疲劳损伤力学模型的一种特殊的退化形式。
Manson--Coffin model of low cycle fatigue is a classical empirical formula, and its mechanical implications are very pool. Based on damage mechanics and Ramberg--Osgood rule, a damage mechanics model of tow cycle fatigue was deduced under the dominate variable of plastic strain amplitude. By the comparison with Manson--Coffin model, it is shown that they are equivalent under proportional loading and Manson--Coffin model is a special degenerative form of damage mechanics fatigue model.
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2011年第7期812-814,共3页
China Mechanical Engineering
基金
广西科学基金资助项目(桂科自0832030)
广西制造系统与先进制造技术重点实验室资助项目(桂科能0842006-005-Z)
关键词
低周疲劳
损伤力学
等价
比例载荷
low cycle fatigue
damage mechanics
equivalence
proportional loading
