Study on the wavelet decomposed details of impact induced AE signals in composite laminates using fiber Bragg grating sensors

Hyung-joon Bang; Chun-gon Kim

doi:10.1117/12.847522

1 April 2010 Study on the wavelet decomposed details of impact induced AE signals in composite laminates using fiber Bragg grating sensors

Hyung-joon Bang, Chun-gon Kim

Author Affiliations +

Proceedings Volume 7647, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2010; 76473E (2010) https://doi.org/10.1117/12.847522
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2010, San Diego, California, United States

Abstract

Because of the higher attenuation of AE signal in composite materials, it is required to develop a damage assessment technique less affected by the signal intensity in order to use AE signals for damage detection. In this research, we investigated impact induced AE signals using FBG sensors on carbon epoxy composite panel. The frequency characteristics of impact AE signals were examined with wavelet decomposition focused on the leading wave. Consequently, we established a damage assessment technique using the sharing percentage of the wavelet detail components of AE signal, and conducted a low-velocity impact test on composite laminates to confirm the feasibility of the damage assessment method with FBG sensors.

Citation Download Citation

Hyung-joon Bang and Chun-gon Kim "Study on the wavelet decomposed details of impact induced AE signals in composite laminates using fiber Bragg grating sensors", Proc. SPIE 7647, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2010, 76473E (1 April 2010); https://doi.org/10.1117/12.847522

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