A framework of crystal plasticity finite element incorporating multiple fatigue cracking mechanisms in titanium alloys
文献类型：期刊论文
| 作者 | Wu H(仵涵); Sun CQ(孙成奇)1 |
| 刊名 | ENGINEERING FRACTURE MECHANICS
 |
| 出版日期 | 2025-10-17 |
| 卷号 | 327页码:21 |
| 关键词 | Titanium alloy Very high cycle fatigue Crystal plasticity finite element method Cohesive zone method Crack initiation mechanism |
| ISSN号 | 0013-7944 |
| DOI | 10.1016/j.engfracmech.2025.111482 |
| 通讯作者 | Sun, Chengqi(scq@lnm.imech.ac.cn) |
| 英文摘要 | Fatigue failure is the result of competition of multiple crack initiation mechanisms in most cases. Crystal plasticity finite element method is a powerful tool for understanding the microscopic process of fatigue crack initiation and evolution. However, existing researches generally concern the single crack initiation mechanism, which cannot elucidate the essence of fatigue mechanisms. This paper develops a framework of crystal plasticity coupling slip and twinning and incorporating the competition of different fatigue cracking mechanisms in titanium alloys, i.e., crack initiation due to slip bands, grain refinement, cleavage on slip planes, and cleavage on non-slip planes. Particularly, a strategy is presented for simulating the refining grains, and a criterion is proposed for crack initiation due to grain refinement. The effect of grain size is also considered in the framework. Then, the fatigue cracks of TC17 titanium alloy due to different crack initiation mechanisms under very high cycle fatigue loading are simulated. The results of fatigue initiation and microstructural evolution accord well with the experiments. The present work provides a method not only to deal with the competition of fatigue cracking mechanisms in titanium alloys but also to simulate the microscopic process of crack initiation and early growth accompanied by microstructure evolution. |
| 分类号 | 一类 |
| WOS关键词 | HIGH-CYCLE FATIGUE ; GRAIN-SIZE DISTRIBUTION ; NEAR-THRESHOLD FATIGUE ; ALPHA-TITANIUM ; STRESS RATIO ; HARMONIC STRUCTURE ; SENSITIVE FATIGUE ; INITIATION ; MODEL ; DEFORMATION |
| 资助项目 | Strategic Priority Research Program of Chinese Academy of Sciences[XDB0620303] |
| WOS研究方向 | Mechanics |
| 语种 | 英语 |
| WOS记录号 | WOS:001552527400001 |
| 资助机构 | Strategic Priority Research Program of Chinese Academy of Sciences |
| 其他责任者 | 孙成奇 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/103740]  |
| 专题 | 力学研究所_非线性力学国家重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China; 2.Univ Chinese Acad Sci, China Sch Engn Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wu H,Sun CQ. A framework of crystal plasticity finite element incorporating multiple fatigue cracking mechanisms in titanium alloys[J]. ENGINEERING FRACTURE MECHANICS,2025,327:21. |
| APA | 仵涵,&孙成奇.(2025).A framework of crystal plasticity finite element incorporating multiple fatigue cracking mechanisms in titanium alloys.ENGINEERING FRACTURE MECHANICS,327,21. |
| MLA | 仵涵,et al."A framework of crystal plasticity finite element incorporating multiple fatigue cracking mechanisms in titanium alloys".ENGINEERING FRACTURE MECHANICS 327(2025):21. |
入库方式： OAI收割
来源：力学研究所
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