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Cyclic plastic zone-based notch analysis and damage evolution model for fatigue life prediction of metals

文献类型：期刊论文

作者Taddesse AT3; Zhu SP(朱顺鹏)2,3; Liao D3; Keshtegar B1,3
刊名MATERIALS & DESIGN
出版日期2020-06-01
卷号191页码:10
ISSN号0264-1275
关键词Notch Fatigue Cyclic plastic zone Damage mechanics Life prediction
DOI10.1016/j.matdes.2020.108639
通讯作者Zhu, Shun-Peng(zspeng2007@uestc.edu.cn)
英文摘要Fatigue strength analysis of critical components plays a vital role for ensuring structural integrity and operational reliability of major equipment. In notched components, the concept of cyclic plastic zone (CPZ) is commonly utilized for fatigue cracking analysis, in which the CPZ size normally relates to the material strength. In particular, materials with higher yield stress have shown smaller CPZ size and vice versa. According to this, a new approach for determining closed-form stress at the notch tip is proposed by considering the size of cyclic plastic zone, which can be used for the notch tip stress evaluation along the load direction under cyclic loadings. By implementing FE analysis, experimental data of 304 stainless steel, 40Cr steel and Ti-6Al-4V alloy are utilized for model validation and comparison. Results show that the scope of damaged CPZ alters the notch tip stress under fatigue loadings, and the proposed model yields better correlation of fatigue life predictions with experimental results of the three materials than other two models. (C) 2020 The Authors. Published by Elsevier Ltd.
分类号二类/Q1
WOS关键词CRACK GROWTH-RATES ; CRITICAL PLANE ; PROPAGATION ; INITIATION ; COMPONENTS ; MECHANICS ; SIZE ; DISCS ; STEEL
资助项目National Natural Science Foundation of China[11972110] ; National Natural Science Foundation of China[11672070] ; Sichuan Provincial Key Research and Development Program[2019YFG0348] ; Fundamental Research Funds for the Central Universities[ZYGX2019J040] ; Science and Technology Program of Guangzhou, China[201904010463] ; Opening Fund of State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, China
WOS研究方向Materials Science
语种英语
WOS记录号WOS:000536937200055
资助机构National Natural Science Foundation of China ; Sichuan Provincial Key Research and Development Program ; Fundamental Research Funds for the Central Universities ; Science and Technology Program of Guangzhou, China ; Opening Fund of State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, China
其他责任者Zhu, Shun-Peng
源URL[http://dspace.imech.ac.cn/handle/311007/82128]  
专题力学研究所_非线性力学国家重点实验室
作者单位1.Univ Zabol, Dept Civil Engn, Zabol, Iran
2.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech LNM, Beijing 100190, Peoples R China;
3.Univ Elect Sci & Technol China, Sch Mech & Elect Engn, Chengdu 611731, Peoples R China;
推荐引用方式
GB/T 7714		 Taddesse AT,Zhu SP,Liao D,et al. Cyclic plastic zone-based notch analysis and damage evolution model for fatigue life prediction of metals[J]. MATERIALS & DESIGN,2020,191:10.
APA Taddesse AT,朱顺鹏,Liao D,&Keshtegar B.(2020).Cyclic plastic zone-based notch analysis and damage evolution model for fatigue life prediction of metals.MATERIALS & DESIGN,191,10.
MLA Taddesse AT,et al."Cyclic plastic zone-based notch analysis and damage evolution model for fatigue life prediction of metals".MATERIALS & DESIGN 191(2020):10.

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来源：力学研究所

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