Zobrazeno 1 - 10
of 14
pro vyhledávání: '"Yunshil Choi"'
Publikováno v:
Measurement Science and Technology. 34:052001
This article presents a comprehensive review of the laser-based guided ultrasonic waves propagation imaging (G-UPI) system and respective signal/data processing methods related to the nondestructive testing and evaluation of thin-walled structures. T
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c6f8a13f0de92f4ee32777c91736edbd
https://doi.org/10.1088/1361-6501/acae27
https://doi.org/10.1088/1361-6501/acae27
Publikováno v:
Structural Control and Health Monitoring. 28
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::758e62bb182b4e145cb19586fc1ab080
https://doi.org/10.1002/stc.2846
https://doi.org/10.1002/stc.2846
Publikováno v:
Measurement. 125:294-302
Various structural health monitoring (SHM) systems that have been developed based on laser ultrasonics and fiber optics are introduced in this paper. The systems are used to realize the new SHM paradigm for ground SHM, called the Smart Hangar. Guided
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5a941fb9de61c98eab1a8e637b730a19
https://doi.org/10.1016/j.measurement.2018.04.067
https://doi.org/10.1016/j.measurement.2018.04.067
Autor:
Jung-Ryul Lee, Yunshil Choi
Publikováno v:
Journal of Intelligent Material Systems and Structures. 29:3411-3425
Barely visible impact damage from low-velocity impacts have been studied as critical design factors of composite structures. In this article, a dual-energy wave subtraction algorithm using an ultrasonic propagation imaging system is proposed to evalu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2c0b010de44926d4b4cfc84122f7a671
https://doi.org/10.1177/1045389x17721040
https://doi.org/10.1177/1045389x17721040
Autor:
Jung-Ryul Lee, Yunshil Choi
Publikováno v:
NDT & E International. 86:53-64
We propose the multi-directional adjacent wave subtraction (MAWS), shifted time point (STP) mapping and variable time window amplitude (VTWA) mapping algorithms for crack visualization based on our finding that the processing direction of the adjacen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::417ec07358d16f7963990c3e4ece6d14
https://doi.org/10.1016/j.ndteint.2016.11.009
https://doi.org/10.1016/j.ndteint.2016.11.009
Akademický článek
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Publikováno v:
Composite Structures. 259:113446
Increasing use of thick composite structures in many fields, including the aerospace and shipbuilding industries, necessitates appropriate inspection techniques to ensure structural integrity. Of many nondestructive testing techniques, laser ultrason
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::524d32b71ee14cdc18706369d0816d65
https://doi.org/10.1016/j.compstruct.2020.113446
https://doi.org/10.1016/j.compstruct.2020.113446
Publikováno v:
Measurement. 147:106837
Recently, composite lattice structures are attracting significant attention owing to their high specific stiffness and specific strength and are mainly used in aerospace applications. However, the composite lattice structure also exhibits damage occu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b5afbdabe6cbacc81ce6c85d1fd5f73a
https://doi.org/10.1016/j.measurement.2019.07.065
https://doi.org/10.1016/j.measurement.2019.07.065
Publikováno v:
SPIE Proceedings.
In this paper, an impact monitoring system using fiber Bragg grating (FBG) sensors and vibro-haptic actuators have been introduced. The system is suggested for structural health monitoring (SHM) for unmmaned aerial vehicles (UAVs), by making a decisi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::26bb416c7ad50f3e52ac1dd43e345873
https://doi.org/10.1117/12.2265373
https://doi.org/10.1117/12.2265373
Autor:
Yunshil Choi, Jung-Ryul Lee
Publikováno v:
2016 IEEE Aerospace Conference.
In various research fields, barely visible impact damages (BVID) caused by low velocity impacts have been studied as critical design factors of composite sandwich structures. Thus, dual-energy wave subtraction (DWS) algorithm using ultrasonic propaga
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e8d04cd25748b38587018bed530b2595
https://doi.org/10.1109/aero.2016.7500863
https://doi.org/10.1109/aero.2016.7500863