Heonyoung Kim
Yonsei University
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Publication
Featured researches published by Heonyoung Kim.
Journal of the Korean Society for Nondestructive Testing | 2016
Heonyoung Kim; Donghoon Kang; Seung Jae Oh; Chulmin Joo
Enhancing mechanical strength of concrete has been fascinated using carbon-based nanomaterials such as CNT and graphene. The key to improving strength is a dispersion of nanomaterials. A novel method is required to investigate the dispersion inner concrete nondestructively. In this study, the optical optical properties such as refractive index and absorption coefficient are measured in nano-cement mortar specimens containing MWCNT and GO using THz electro-magnetic waves. From the results, the properties of nano-cement mortar are confirmed to be 1.0% to 2.5% higher in refractive index, and –14% to 28% higher in absorption coefficient than those of cement mortar at the average values. Using these characteristics, visualizing the dispersion of nano-concrete structures seems possible in future.
Journal of the Korean Society for Nondestructive Testing | 2014
Donghoon Kang; Heonyoung Kim; Dae-Hyun Kim
Abstract A study on smart seats for railroad vehicles was conducted using piezoelectric (PZT) sensors. For this purpose, the concept of passenger friendly smart seats was defined, and a PZT sensor was selected as the optimum sensor based on this concept. Using PZT sensors, simulation tests were performed using a sub-scale model railroad vehicle. In these tests, the main functions of the smart seats were extracted and simplified to improve the effectiveness of the simulation tests. Based on the test results, the system for smart seats proposed in this paper was successfully verified using PZT sensors and the dedicated operation software for the system. This paper will contribute to the improvement of services in high-speed rail systems through advances in ticket checking tasks. Keywords: Smart Seats, Railroad Vehicles, PZT, Simulation[접수일: 2014. 9. 1, 수정일: 2014. 9. 18, 게재확정일: 2014. 9. 23] *한국철도기술연구원 융합신기술연구팀, **서울과학기술대학교 기계공학과, ***서울과학기술대학교 기계․자동차공학과, ✝Corresponding Author: Department of Mechanical and Automotive Engineering, Seoul National University of Science and Technology, Seoul, 139-743, Korea (E-mail: [email protected])
International Journal of Precision Engineering and Manufacturing | 2016
Donghoon Kang; Heonyoung Kim; Dae-Hyun Kim; Seunghee Park
Transactions of The Korean Society of Mechanical Engineers A | 2018
Heonyoung Kim; Donghoon Kang
JOURNAL OF THE KOREAN SOCIETY FOR NONDESTRUCTIVE TESTING | 2018
Heonyoung Kim; Donghoon Kang
JOURNAL OF THE KOREAN SOCIETY FOR NONDESTRUCTIVE TESTING | 2018
Sun Hee Kim; Heonyoung Kim; Kyungwho Choi; Donghoon Kang
Construction and Building Materials | 2018
Heonyoung Kim; Donghoon Kang; Seung Jae Oh; Chulmin Joo
Smart Structures and Systems | 2017
Heonyoung Kim; Donghoon Kang; Dae-Hyun Kim
JOURNAL OF THE KOREAN SOCIETY FOR NONDESTRUCTIVE TESTING | 2017
Heonyoung Kim; Donghoon Kang
JOURNAL OF THE KOREAN SOCIETY FOR NONDESTRUCTIVE TESTING | 2017
Heonyoung Kim; Donghoon Kang