Byeong-Wook Jang

TL;DR: In this paper, the impact localization algorithms for various composite structures were developed using the impact induced acoustic signals acquired by multiplexed fiber Bragg grating (FBG) sensors, and the acoustic waves from a given impact were transmitted to each FBG sensor, and incurred FBG wavelength shifts were captured by a high speed multiplexible FBG interrogation system with a sampling frequency of 100 kHz.

TL;DR: In this paper, the potential of using high speed fiber Bragg grating (FBG) sensing system for detecting the delamination onset was studied for thick carbon fiber reinforced polymer (CFRP) laminates.

TL;DR: The magnitudes of fiber optic sensor signals were used for estimating the distances between each sensor and impact location, and the suggested triangulation method showed the acceptable localization results about the non-trained impact points.

TL;DR: A real-time impact localization algorithm for a stiffened composite structure using acoustic emission signals acquired by multiplexed fiber Bragg grating (FBG) sensors is proposed in this paper.

TL;DR: In this article, high speed bird strikes on a composite structure were successfully monitored using optical fiber sensors, and the strike locations were estimated with the neural network which was trained through the pre-impact tests.