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A fatigue limit evaluation method based on plastic strain incremental energy dissipation theory

文献类型：期刊论文

作者Zu, Ruili; Zhu, Yingbin2; Huang XF(黄先富); Huang, Yao; Zhou, Yizhou4; Zhao, Jiaye3; Liu, Zhanwei
刊名ENGINEERING FRACTURE MECHANICS
出版日期2023-04-14
卷号282页码:109173
关键词Fatigue limit Plastic strain incremental energy dissipation theory Infrared thermal imaging Digital image correlation
ISSN号0013-7944
DOI10.1016/j.engfracmech.2023.109173
英文摘要Metallic materials frequently undergo fatigue failure during long term service. Therefore, the study of fatigue performance detection methods with high precision and wide application ranges is crucial to reduce fatigue failures and accidents of materials and structures. In this study, a plastic strain incremental energy dissipation theory (PSIEDT) is established, and a general expression for fatigue limit is derived with the starting point of the plastic strain increment. Taking 42CrMo4 steel as an example, and its temperature and deformation fields are obtained synchronously using infrared thermal imaging and digital image correlation. Its fatigue limit is evaluated using the energy dissipation theory based on the plastic strain increment. The results show that the relative error between the fatigue limit measurement accuracies of the developed method and the method proposed by Luong is 1.64 %. The relative error of the fatigue limit obtained for the local damage region is only 0.18 %, which has a high measurement accuracy. At the microscopic level, the onset of plastic strain corresponds to a change in the microstructure of the material from reversible deformation (viscoelastic) to permanent deformation (plasticity). Therefore, the strain measurements have higher sensitivity than the temperature measurements. Considering the limited heat release of many materials, the new method has a wide application range, can rapidly obtain material fatigue properties, and has good engineering application prospects.
分类号一类
WOS研究方向Mechanics
语种英语
WOS记录号WOS:000951493300001
资助机构National Natural Science Foundation of China [11972084] ; National Science and Technology Major Project [2017 VI 0003 0073]
其他责任者Liu, ZW (corresponding author), Beijing Inst Technol, Sch Aerosp Engn, Beijing 100081, Peoples R China.
源URL[http://dspace.imech.ac.cn/handle/311007/91801]  
专题力学研究所_非线性力学国家重点实验室
作者单位1.Inst Flexible Elect Technol THU, Jiaxing 314006, Zhejiang, Peoples R China
2.Beijing Inst Technol, Sch Aerosp Engn, Beijing 100081, Peoples R China
3.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
4.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China
5.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China
推荐引用方式
GB/T 7714		 Zu, Ruili,Zhu, Yingbin,Huang XF,et al. A fatigue limit evaluation method based on plastic strain incremental energy dissipation theory[J]. ENGINEERING FRACTURE MECHANICS,2023,282:109173.
APA Zu, Ruili.,Zhu, Yingbin.,黄先富.,Huang, Yao.,Zhou, Yizhou.,...&Liu, Zhanwei.(2023).A fatigue limit evaluation method based on plastic strain incremental energy dissipation theory.ENGINEERING FRACTURE MECHANICS,282,109173.
MLA Zu, Ruili,et al."A fatigue limit evaluation method based on plastic strain incremental energy dissipation theory".ENGINEERING FRACTURE MECHANICS 282(2023):109173.

入库方式： OAI收割

来源：力学研究所

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