Pore-based prediction of crack initiation life in very-high-cycle fatigue
文献类型：期刊论文
| 作者 | Zhang NY(张宁豫); Liu WQ(刘文琦); Shi T(时涛); Sun JY(孙经雨); Qian GA(钱桂安)
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| 刊名 | INTERNATIONAL JOURNAL OF FATIGUE
 |
| 出版日期 | 2025-01 |
| 卷号 | 190页码:108655 |
| 关键词 | Laser powder bed fusion Very-high-cycle-fatigue Porosity Crack initiation life Crack initiation position |
| ISSN号 | 0142-1123 |
| DOI | 10.1016/j.ijfatigue.2024.108655 |
| 英文摘要 | The porosity of the material produced by additive manufacturing technology gives rise to a notable dispersion of the crack initiation life in the very-high-cycle fatigue regime. The crack initiation life in the very high cycle fatigue regime can be divided into the initial crack initiation life and early microcrack growth life. This paper proposed a model considering the effect of pore morphology and location to predict the initial crack initiation life. The average local stress in a grain near the pore is modified by considering the relationship between pore roundness, inclination, position, and stress concentration factor. The growth life of early microcrack is determined by integrating empirical formulas based on dislocation theory. Subsequently, the probability distribution of crack initiation life is obtained, which is in good agreement with the experimental results. The competition factor is proposed to quantitatively evaluate the tendency of crack initiation from the surface or the interior, taking into account the influence of local average stress and grain size. The predicted load corresponding to the shift in crack initiation position is in accordance with the experimental results. |
| 分类号 | 一类 |
| WOS研究方向 | Engineering ; Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:001346834200001 |
| 资助机构 | National Natural Science Foundation of China {12072345, 11932020] ; International Partnership Program for Grand Challenges of Chinese Academy of Sciences {025GJHZ2023092GC] ; Science Center for Gas Turbine Project {P2022-B-III-008-001] |
| 其他责任者 | Qian GA |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/97189]  |
| 专题 | 力学研究所_非线性力学国家重点实验室 |
| 作者单位 | Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang NY,Liu WQ,Shi T,et al. Pore-based prediction of crack initiation life in very-high-cycle fatigue[J]. INTERNATIONAL JOURNAL OF FATIGUE,2025,190:108655. |
| APA | 张宁豫,刘文琦,时涛,孙经雨,&钱桂安.(2025).Pore-based prediction of crack initiation life in very-high-cycle fatigue.INTERNATIONAL JOURNAL OF FATIGUE,190,108655. |
| MLA | 张宁豫,et al."Pore-based prediction of crack initiation life in very-high-cycle fatigue".INTERNATIONAL JOURNAL OF FATIGUE 190(2025):108655. |
入库方式： OAI收割
来源：力学研究所
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