Work

An acceleration-only modal circle-fitting method for in-situ fatigue damage detection

Year: 2025

Type: article

Abstract: 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.

Source: Scientific Reports

DOI: 10.1038/s41598-025-29652-5

Authors: Da Som Kang, Seung-Hoon Bae, Seunghun Baek

Institutions: Korea Institute of Machinery & Materials, Pusan National University

Language: English

Topic: Structural Health Monitoring Techniques

Subfield: Civil and Structural Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Industry, innovation and infrastructure

Open Access status: gold

Estimated APC paid: $2,690