Chan-Yik Park

TL;DR: In this article, a wavelet-transformed ultrasonic propagation imaging method was proposed for automatic inspection of in-service engineering structures, or in-process quality inspection in manufacturing.

TL;DR: In this paper, the anomalous wave propagation imaging (AWPI) method is proposed for the laser ultrasonic propagation imaging system using a Q-switched laser and a laser mirror scanner to highlight the anomalies in complex structures.

TL;DR: In this paper, an anomalous wave propagation imaging method with adjacent wave subtraction using laser ultrasonic scanning was developed for non-destructive evaluation of complex structures because it highlights the propagation of anomalous waves related to structural discontinuities, and suppresses complex incident waves without the need of pre-stored reference data.

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, the effect of repeat laser pulse scanning on the mechanical characteristics of unpainted and painted CFRP specimens (USN175BX Carbon UD prepreg, Bisphenol A epoxy resin) is investigated to verify the reliability regarding the use of laser ultrasonic scanning based NDE techniques on the inspection of the CFRP structure.