Prof. Jinkyu Yang Profile

Prof. Jinkyu Yang

Professor at Seoul National Univ

SPIE Involvement:

Conference Program Committee | Conference Co-Chair | Editor | Author

Proceedings Article | 10 May 2024 Presentation

Reconfigurable mechanical metamaterials based on Tachi-Miura Polyhedron

Yuyang Song, Koshiro Yamaguchi, Yasuhiro Miyazawa, Jinkyu Yang

Proceedings Volume 12946, 1294605 (2024) https://doi.org/10.1117/12.3012673

KEYWORDS: Metamaterials, Tunable metamaterials, Materials properties, Fabrication, Design and modelling, Testing and analysis, Prototyping, Modeling, Manufacturing, Engineering

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Proceedings Article | 28 April 2023 Presentation + Paper

Experimental analysis on nonlinear elastic wave characteristics of metallic origami cylinder

H. S. Park, J. H. Han, Jinkyu Yang

Proceedings Volume 12483, 1248303 (2023) https://doi.org/10.1117/12.2658272

KEYWORDS: Wave propagation, Elasticity, Metamaterials, Attenuation, Numerical simulations, Finite element methods, Nonlinear metamaterials

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Proceedings Article | 18 April 2022 Presentation

Analysis of origami-based mechanical metamaterials via extended three dimensional Ashby chart

Koshiro Yamaguchi, Jinkyu Yang

Proceedings Volume PC12043, (2022) https://doi.org/10.1117/12.2612216

KEYWORDS: Metamaterials, Mechanical engineering, Visualization, Product engineering, Positron emission tomography, Manufacturing

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Proceedings Article | 18 April 2022 Presentation

Theoretical framework of coupled rogue waves in mechanical metamaterials

Yasuhiro Miyazawa, Jinkyu Yang

Proceedings Volume PC12043, (2022) https://doi.org/10.1117/12.2612220

KEYWORDS: Metamaterials, Transparent conductors, Energy harvesting

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Proceedings Article | 18 April 2022 Presentation

Efficient and robust boundary state transfer on origami-based mechanical metamaterials

Yasuhiro Miyazawa, Chun-Wei Chen, Rajesh Chaunsali, Gloria Yin, Georgios Theocharis, Jinkyu Yang

Proceedings Volume PC12048, PC120480A (2022) https://doi.org/10.1117/12.2612490

KEYWORDS: Transparent conductors, Metamaterials, Energy transfer

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Proceedings Article | 22 March 2021 Poster + Presentation

Origami-based deployable tubular structure with Yoshimura pattern

Jong-Eun Suh, Jinkyu Yang, Jae-Hung Han

Proceedings Volume 11588, 115881Q (2021) https://doi.org/10.1117/12.2586830

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Proceedings Article | 22 March 2021 Presentation

A study on the electromagnetic performance evaluation of composite specimen based on 3D printer

Jong-Min Hyun, Sang-Yeon Cho, Kyunghwan Kim, Jung-Ryul Lee, Jinkyu Yang

Proceedings Volume 11588, 115880N (2021) https://doi.org/10.1117/12.2585198

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Proceedings Article | 27 April 2020 Presentation

Mitigation of impact applied to payload via origami-based mechanical metamaterials (Conference Presentation)

James O'Neil, Yasuhiro Miyazawa, Jinkyu Yang

Proceedings Volume 11381, 113810X (2020) https://doi.org/10.1117/12.2557906

KEYWORDS: Transparent conductors, Metamaterials, Prototyping, Digital image correlation

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Proceedings Article | 24 April 2020 Presentation

Feasibility study on the formation of rogue waves in origami-based mechanical metamaterials (Conference Presentation)

Yasuhiro Miyazawa, Hiromi Yasuda, Jinkyu Yang

Proceedings Volume 11381, 113810V (2020) https://doi.org/10.1117/12.2558116

KEYWORDS: Transparent conductors, Metamaterials, Numerical simulations, Switches, Energy harvesting

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Proceedings Article | 24 April 2020 Presentation

Combinatorial search for auxetic origami tessellations (Conference Presentation)

Koshiro Yamaguchi, Hiromi Yasuda, Kosei Tsujikawa, Takahiro Kunimine, Jinkyu Yang

Proceedings Volume 11381, 113811C (2020) https://doi.org/10.1117/12.2558314

KEYWORDS: Metamaterials, Structural design

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Proceedings Article | 1 April 2019 Presentation + Paper

Flexural wave control via origami-based elastic metamaterials

Mingkai Zhang, Jinkyu Yang, Rui Zhu

Proceedings Volume 10972, 109720Q (2019) https://doi.org/10.1117/12.2514179

KEYWORDS: Metamaterials, Wave propagation, Bistability, Adaptive control

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Proceedings Article | 3 April 2018 Presentation

Tunable wave propagation in origami-based reconfigurable mechanical metamaterials (Conference Presentation)

Hiromi Yasuda, Jinkyu Yang

Proceedings Volume 10600, 1060017 (2018) https://doi.org/10.1117/12.2296442

KEYWORDS: Wave propagation, Metamaterials, Transparent conductors, Prototyping, Numerical analysis

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Proceedings Article | 3 April 2018 Presentation

Topologically tunable metamaterial based on bi-stable Stewart platform (Conference Presentation)

Ying Wu, Hiromi Yasuda, Rajesh Chaunsali, Kaiping Yu, Jinkyu Yang

Proceedings Volume 10600, 106001F (2018) https://doi.org/10.1117/12.2296004

KEYWORDS: Tunable metamaterials, Surface plasmons, Wave propagation, Backscatter, Metamaterials, Dielectrics, Materials science, Crystals, Crystallography, Numerical simulations

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The discovery of topological insulators in materials science revolutionized the concept of wave propagation by giving rise to the existence of edge modes that are immune to backscattering. Similarly, the tunability in waveguiding – including in-situ frequency modifications and path designation – can be highly useful in manipulating energy flow, which still remains an open challenge. Here we investigate topologically tunable mechanical metamaterials based on the quantum valley hall effect (QVHE) by utilizing the bi-stable Stewart platform (SP). Generally, topologically protected wave propagation can leverage two physical mechanisms: the quantum hall effect (QHE) and the quantum spin hall effect (QSHE). Compared to the QHE and the QSHE, the QVHE exploited in this study maintains the time reversal symmetry and can be achieved by using a relatively simple, passive system with one degree-of-freedom. The tunable system we propose and investigate in this study is made of a two-dimensional hexagon crystal and is composed of SPs at nodes connected by linear springs. Each building block can exhibit one of the two stable states of the SP, so that the C6 inversion symmetry of the lattice is broken while C3 symmetry is reserved. By changing the sequence of the bi-stable state in the SP, we can formulate two kinds of unit cells – marked as A and B – with different topological properties. Berry curvatures as well as corresponding eigenmodes are obtained to demonstrate the topological conversion between the two lattices. Then we conduct super-cell analysis by forming a 1-by-20 array of A and B unit cells. Band structure of the super-cell indicates the existence of edge modes over the while band gap, which appear at the interface of A and B unit cells. Based on this tunable property of bi-stable SP, we can easily form S-type and L-type (60 and 120 degree bents) topological paths in the 40-by-40 lattices without breaking the original geometry parameters. We then conduct the numerical simulations with these topological wave guides to verify the topological protection of the valley hall edge states from backscattering. The tunable system we proposed in this paper may pave a possible way to achieving tunability of topological metamaterials.

Proceedings Article | 11 May 2017 Presentation

Origami-based mechanical metamaterials with tunable frequency band structures (Conference Presentation)

Hiromi Yasuda, Riley Pratt, Jinkyu Yang

Proceedings Volume 10170, 101700H (2017) https://doi.org/10.1117/12.2258635

KEYWORDS: Metamaterials, Prototyping, Current controlled current source

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Proceedings Article | 11 May 2017 Presentation

Control of subwavelength flexural waves via kirigami-based hyperlens (Conference Presentation)

Rui Zhu, Hiromi Yasuda, Guoliang Huang, Jinkyu Yang

Proceedings Volume 10170, 101700K (2017) https://doi.org/10.1117/12.2258671

KEYWORDS: Metamaterials, Manufacturing, Signal processing, 3D microstructuring, 3D modeling, Wave propagation, Numerical simulations, Super resolution, Wave plates, Structural engineering

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Proceedings Article | 17 May 2005 Paper

Verification of a built-in health monitoring system for bolted thermal protection panels

Jinkyu Yang, Fu-Kuo Chang

Proceedings Volume 5765, (2005) https://doi.org/10.1117/12.600213

KEYWORDS: Sensors, Signal attenuation, Diagnostics, Structural health monitoring, Prototyping, Interfaces, Algorithm development, Wave propagation, Feature extraction, Aluminum

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Proceedings Article | 1 August 2003 Paper

Design of a built-in health monitoring system for bolted thermal protection panels

Jinkyu Yang, Fu-Kuo Chang, Mark Derriso

Proceedings Volume 5046, (2003) https://doi.org/10.1117/12.508340

KEYWORDS: Sensors, Ferroelectric materials, Inspection, Acoustics, Diagnostics, Prototyping, Actuators, Signal detection, Wavelet transforms, Wave propagation

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Showing 5 of 17 publications

SPIE Conference Volume | 21 May 2024

Active and Passive Smart Structures and Integrated Systems XVIII

SPIE Conference Volume | 1 June 2023

Active and Passive Smart Structures and Integrated Systems XVII

SPIE Conference Volume | 20 April 2022

Active and Passive Smart Structures and Integrated Systems XVI

Conference Committee Involvement (16)

Health Monitoring of Structural and Biological Systems XIX

17 March 2025 | Vancouver, B.C., Canada

Active and Passive Smart Structures and Integrated Systems XIX

17 March 2025 | Vancouver, B.C., Canada

Active and Passive Smart Structures and Integrated Systems XVIII

25 March 2024 | Long Beach, California, United States

Health Monitoring of Structural and Biological Systems XVIII

25 March 2024 | Long Beach, California, United States

Health Monitoring of Structural and Biological Systems XVII

13 March 2023 | Long Beach, California, United States

Active and Passive Smart Structures and Integrated Systems XVII

13 March 2023 | Long Beach, California, United States

Active and Passive Smart Structures and Integrated Systems XVI

7 March 2022 | Long Beach, California, United States

Health Monitoring of Structural and Biological Systems XVI

7 March 2022 | Long Beach, California, United States

Health Monitoring of Structural and Biological Systems XV

8 March 2021 | Online Only, California, United States

Active and Passive Smart Structures and Integrated Systems XV

8 March 2021 | Online Only, California, United States

Health Monitoring of Structural and Biological Systems XIV

27 April 2020 | Online Only, California, United States

Active and Passive Smart Structures and Integrated Systems XIV

27 April 2020 | Online Only, California, United States

Health Monitoring of Structural and Biological Systems XIII

4 March 2019 | Denver, Colorado, United States

Health Monitoring of Structural and Biological Systems XII

5 March 2018 | Denver, Colorado, United States

Health Monitoring of Structural and Biological Systems XI

26 March 2017 | Portland, Oregon, United States

Health Monitoring of Structural and Biological Systems X

21 March 2016 | Las Vegas, Nevada, United States

Showing 5 of 16 Conference Committees

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