H
Hyung Jin Lim
Researcher at KAIST
Publications - 54
Citations - 1195
Hyung Jin Lim is an academic researcher from KAIST. The author has contributed to research in topics: Ultrasonic sensor & Lamb waves. The author has an hindex of 16, co-authored 50 publications receiving 861 citations. Previous affiliations of Hyung Jin Lim include Kyonggi University & Arizona State University.
Papers
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Nonlinear ultrasonic wave modulation for online fatigue crack detection
TL;DR: In this article, a fatigue crack detection technique using nonlinear ultrasonic wave modulation is presented, in which a signal processing technique combining linear response subtraction (LRS) and synchronous demodulation (SD) is developed specifically to extract the crack-induced spectral sidebands.
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Second harmonic generation at fatigue cracks by low-frequency Lamb waves: experimental and numerical studies
TL;DR: In this paper, the second harmonic generation due to non-linear interaction of Lamb waves with a fatigue crack was investigated in 3D finite element simulations and experimental studies were carried out to provide physical insight into the mechanism of second harmonic generator.
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Impedance based damage detection under varying temperature and loading conditions
TL;DR: In this paper, a data normalization technique using Kernel Principal Component Analysis (KPCA) is developed to improve damage detectability under varying temperature and external loading conditions and to minimize false-alarms due to these variations.
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Reference-free fatigue crack detection using nonlinear ultrasonic modulation under various temperature and loading conditions
TL;DR: In this paper, a reference-free fatigue crack detection technique using nonlinear ultrasonic modulation is presented, where the crack-induced spectral sidebands are isolated using a combination of linear response subtraction (LRS), synchronous demodulation (SD) and continuous wavelet transform (CWT) filtering.
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Instantaneous delamination detection in a composite plate using a dual piezoelectric transducer network
TL;DR: In this paper, the authors proposed a new damage detection technique based on the assumption that the fundamental anti-symmetric (A0) mode slows down when it passes through a delamination area while the speed of the fundamental symmetric (BS) mode is little affected by delamination.