A new method for estimating fatigue life of notched specimen

doi:10.1016/j.tafmec.2017.07.017

CORC > 兰州理工大学 > 兰州理工大学 > 机电工程学院

	A new method for estimating fatigue life of notched specimen
	Liu Jianhui; Zhang Ruilong; Wei Yaobing; Lang Shanshan
刊名	THEORETICAL AND APPLIED FRACTURE MECHANICS
	2018-02
卷号	93 页码:137-143
关键词	Fatigue life Notch specimen Damage mechanics Stress concentration factor
ISSN号	0167-8442
DOI	10.1016/j.tafmec.2017.07.017
英文摘要	Fatigue life of engineering structure contains two parts: crack initiation life and crack propagation life. Fracture mechanics is adopted to estimate crack propagation life in the real engineering structures and has made some achievements. Actually, the existing study indicated that fatigue crack initiation is also an important period in the whole fatigue life. So, a new method to predict the whole fatigue life of notch components is proposed based on the theory of damage mechanics in this paper. The damage evolution equation of notch specimen under tension compression loading is obtained based on closed-form solution. The stress distributions of notch root are analyzed by finite element method. The whole fatigue life of notch specimen is estimated by the proposed method when stress concentration factor is different. It has been verified that the results calculated by proposed method is close to the experimental results and the model put forward in this paper is superior to Manson-Coffin Law. The result indicates that the proposed method is concise, effective and feasible for practical application. (C) 2017 Published by Elsevier Ltd.
资助项目	National Natural Science Foundation of China[51605212][51665028]
WOS研究方向	Engineering ; Mechanics
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000423002600013
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/32788]
专题	机电工程学院
通讯作者	Liu Jianhui
作者单位	LanZhou Univ Technol, Sch Mech & Elect Engn, 287 Langongping Rd, Lanzhou 730050, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Liu Jianhui,Zhang Ruilong,Wei Yaobing,et al. A new method for estimating fatigue life of notched specimen[J]. THEORETICAL AND APPLIED FRACTURE MECHANICS,2018,93:137-143.
APA	Liu Jianhui,Zhang Ruilong,Wei Yaobing,&Lang Shanshan.(2018).A new method for estimating fatigue life of notched specimen.THEORETICAL AND APPLIED FRACTURE MECHANICS,93,137-143.
MLA	Liu Jianhui,et al."A new method for estimating fatigue life of notched specimen".THEORETICAL AND APPLIED FRACTURE MECHANICS 93(2018):137-143.