An acceleration-only modal circle-fitting method for in-situ fatigue damage detection
This study proposes a novel modal circle-fitting method to estimate natural frequency and damping ratio from output-only acceleration. Validated through vibration-fatigue testing on an aerospace bracket, the method successfully detects initial, non-visible fatigue damage through key indicators: a decrease in natural frequency under random vibration and the emergence of a 'split-peak' pattern under sinusoidal excitation.
Authors
- Seung-Hoon Bae (ORCID: https://orcid.org/0000-0001-5808-7186)
- Seunghun Baek (ORCID: https://orcid.org/0000-0001-9020-6579)
- Da Som Kang
Institutions
- Korea Institute of Machinery & Materials (KR)
- Hanwha Solutions (South Korea) (KR)
- Pusan National University (KR)
Publication Details
- Journal
- Scientific Reports
- Published
- 2025-11-28
- DOI
- https://doi.org/10.1038/s41598-025-29652-5
- Primary Topic
- Structural Health Monitoring Techniques
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- National Research Foundation
- National Research Foundation of Korea
- Ministry of Science and ICT, South Korea