PSI - Issue 68

Junji Sakamoto et al. / Procedia Structural Integrity 68 (2025) 1319–1323 Junji Sakamoto et al. / Structural Integrity Procedia 00 (2025) 000–000

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Fig. 7. Change of D d a at f v = 25.3 Hz.

Fig. 8. Comparison of the predicted and experimental results at f v = 25.3 Hz.

4. Conclusions In this study, a method for predicting crack size using the vibration amplitudes of plate specimens of a titanium alloy under bending vibration was investigated. Using the relationship between the total area of cracks and the bending displacement amplitude for tests at two different vibration frequencies as well as the relationship between the vibration frequency and bending displacement amplitude for an undamaged specimen, the bending displacement amplitude at any vibration frequency can be monitored to predict the total area of cracks. Funding This work was supported by JSPS KAKENHI [grant numbers 20K14610 and 24K07235]. Acknowledgements The authors would like to thank Koki Hata for his support during the experimental work and Editage (www.editage.jp) for English language editing. References L. Khalij, C. Gautrelet, A. Guillet, Fatigue curves of a low carbon steel obtained from vibration experiments with an electrodynamic shaker, Mater. Des. 86 (2015) 640–648. https://doi.org/10.1016/j.matdes.2015.07.112. X. Meng, H. Wang, W. Tan, J. Cai, J. Zhou, L. Liu, Gradient microstructure and vibration fatigue properties of 2024-T351 aluminum alloy treated by laser shock peening, Surf. Coat. Technol. 391 (2020) 125698. https://doi.org/10.1016/j.surfcoat.2020.125698. Y. Wang, Y. Gong, Q. Zhang, Y. He, Z. Liu, N. Hu, Fatigue behavior of 2.5D woven composites based on the first-order bending vibration tests, Compos. Struct. 284 (2022) 115218. https://doi.org/10.1016/j.compstruct.2022.115218. W. Xu, X. Yang, B. Zhong, Y. He, C. Tao, Failure criterion of titanium alloy irregular sheet specimens for vibration-based bending fatigue testing, Eng. Fract. Mech. 195 (2018) 44–56. https://doi.org/10.1016/j.engfracmech.2018.03.020.