Assessment of short fatigue crack closure behavior in Ti-6Al-4V alloy using 3D imaged-based CPFEM simulation

使用基于 3D 图像的 CPFEM 模拟评估 Ti-6Al-4V 合金的短疲劳裂纹闭合行为

• 批准号: 21J12176
• 负责人: TUBEI Valary
• 金额: $ 0.96万
• 依托单位: Kyushu University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for JSPS Fellows
• 财政年份: 2021
• 资助国家: 日本
• 起止时间: 2021-04-28 至 2023-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-21J12176/
• 关键词: Fatigue; Short crack; Crack closure; 3D observation; X-ray tomography; Simulation; 3D/4D observation

Titanium alloys are used in critical applications such as the landing gear of aircrafts which are subjected to severe loading and hence demand excellent fatigue properties. Therefore, the understanding of fatigue damage which accounts for up to 90% of failures in structures is critical. This study aims to characterize the 3D short fatigue crack opening and closing behavior and its influence on crack growth rate. Currently, simulation of crack closing and opening behavior based on the actual 3D crack shape is being conducted. From the simulation, know how crack closure is generated in relation to the microstructure. From this understanding, it is possible to design the microstructure of titanium to develop materials which are difficult to fracture, hence guaranteeing safety.

钛合金用于关键应用，例如飞机起落架，其承受严重载荷，因此需要优异的疲劳性能。因此，对占结构失效90%的疲劳损伤的理解至关重要。本研究的目的是表征三维疲劳短裂纹的张开和闭合行为及其对裂纹扩展速率的影响。目前，正在进行基于实际三维裂纹形状的裂纹闭合和张开行为的模拟。通过模拟，了解裂纹闭合是如何与微观结构发生关系的。从这一认识出发，可以设计钛的微观结构，开发出难以断裂的材料，从而确保安全性。

项目成果

3D short fatigue crack closure behavior in Ti-6Al-4V alloy investigated using in-situ high resolution synchrotron X-ray tomography

• DOI: 10.1016/j.engfracmech.2021.107755
• 发表时间: 2021-04
• 期刊: Engineering Fracture Mechanics
• 影响因子: 5.4
• 作者: Valary Tubei;H. Toda;M. Hassanipour;Kyosuke Hirayama;O. Takakuwa;A. Takeuchi;M. Uesugi

Three-dimensional time evolution behavior of short fatigue crack morphology and crack closure assessed using high-energy imaging type CT

使用高能成像型 CT 评估短疲劳裂纹形态和裂纹闭合的三维时间演化行为

• 发表时间: 2022
• 作者: Valary Tubei;Hiroyuki Toda;Akihisa Takeuchi;Masayuki Uesugi
• 通讯作者: Masayuki Uesugi

Application of High Energy Imaging CT to Investigate Local 3D Short Fatigue Crack Closure Behavior in Ti-6Al-4V alloy

应用高能成像 CT 研究 Ti-6Al-4V 合金局部 3D 短疲劳裂纹闭合行为

• 发表时间: 2021
• 作者: Valary TUBEI;Hiroyuki TODA;Kyosuke HIRAYAMA;Meysam HASSANIPOUR;Akihisa TAKEUCHI;Masayuki UESUGI
• 通讯作者: Masayuki UESUGI

Direct observation of three-dimensional short fatigue crack closure behavior in Ti-6Al-4V alloy using ultra-high-resolution X-ray microtomography

超高分辨率X射线显微断层扫描直接观察Ti-6Al-4V合金三维短疲劳裂纹闭合行为

• DOI: 10.1016/j.ijfatigue.2022.107428
• 发表时间: 2022
• 期刊: International Journal of Fatigue
• 影响因子: 6
• 作者: Valary Tubei;Hiroyuki Toda;Worapol Ketanond ;Hiro Fujihara;Osamu Takakuwa;Akihisa Takeuchi;and Masayuki Uesugi
• 通讯作者: and Masayuki Uesugi

Assessment of three-dimensional short fatigue crack closure behavior in Ti-6Al-4V alloy via in-situ X-ray microtomography

通过原位 X 射线显微断层扫描评估 Ti-6Al-4V 合金三维短疲劳裂纹闭合行为

• 发表时间: 2023
• 作者: Valary Tubei;Hiroyuki Toda;Hiro Fujihara;Akihisa Takeuchi;Masayuki Uesugi
• 通讯作者: Masayuki Uesugi