Light-induced wrinkling instability of confined annulus liquid crystal elastomer film
Authors of previous studies have focused on wrinkling phenomena in thin films with relatively large stiffness under mechanical loadings. A liquid crystal elastomer (LCE) is a smart soft material sensitive to various environmental stimuli. In this letter, we investigate the wrinkling instability of a...
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2023
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/169941 |
| _version_ | 1811685396472397824 |
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| author | Kang, Jingtian Liu, Suixin Li, Hua |
| author2 | School of Mechanical and Aerospace Engineering |
| author_facet | School of Mechanical and Aerospace Engineering Kang, Jingtian Liu, Suixin Li, Hua |
| author_sort | Kang, Jingtian |
| collection | NTU |
| description | Authors of previous studies have focused on wrinkling phenomena in thin films with relatively large stiffness under mechanical loadings. A liquid crystal elastomer (LCE) is a smart soft material sensitive to various environmental stimuli. In this letter, we investigate the wrinkling instability of a confined LCE film with different inner hole sizes induced by light illumination. The LCE film is clamped at the outer edge and has a free inner edge. Based on linear perturbation analysis, we obtain the critical condition for the onset of wrinkling instability. Whether the film will remain flat or bifurcate into a wrinkled state is determined by the value of expansion coefficient, light intensity, inner hole size, and thickness of the LCE film. We find that a film with a bigger inner hole size corresponds to a large wrinkle number and show that the expansion coefficient of a LCE and light intensity can be used to adjust the wrinkling instability behavior and time consumption for the appearance of wrinkles. |
| first_indexed | 2024-10-01T04:43:52Z |
| format | Journal Article |
| id | ntu-10356/169941 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T04:43:52Z |
| publishDate | 2023 |
| record_format | dspace |
| spelling | ntu-10356/1699412023-08-19T16:47:57Z Light-induced wrinkling instability of confined annulus liquid crystal elastomer film Kang, Jingtian Liu, Suixin Li, Hua School of Mechanical and Aerospace Engineering Engineering::Mechanical engineering Elastomer Films Environmental Stimuli Authors of previous studies have focused on wrinkling phenomena in thin films with relatively large stiffness under mechanical loadings. A liquid crystal elastomer (LCE) is a smart soft material sensitive to various environmental stimuli. In this letter, we investigate the wrinkling instability of a confined LCE film with different inner hole sizes induced by light illumination. The LCE film is clamped at the outer edge and has a free inner edge. Based on linear perturbation analysis, we obtain the critical condition for the onset of wrinkling instability. Whether the film will remain flat or bifurcate into a wrinkled state is determined by the value of expansion coefficient, light intensity, inner hole size, and thickness of the LCE film. We find that a film with a bigger inner hole size corresponds to a large wrinkle number and show that the expansion coefficient of a LCE and light intensity can be used to adjust the wrinkling instability behavior and time consumption for the appearance of wrinkles. Published version J.K. acknowledges financial support from the Joint fund of Science & Technology Department of Liaoning Province and State Key Laboratory of Robotics, China, No. 2020- KF-12-03, the Fundamental Research Funds for the Central Universities No. N2105015, the National Natural Science Foundation of China, No. 11902070, and China Scholarship Council (Grant No. 202006085016). 2023-08-15T07:02:19Z 2023-08-15T07:02:19Z 2023 Journal Article Kang, J., Liu, S. & Li, H. (2023). Light-induced wrinkling instability of confined annulus liquid crystal elastomer film. Physical Review E, 107(2), L022701-1-L022701-6. https://dx.doi.org/10.1103/PhysRevE.107.L022701 2470-0045 https://hdl.handle.net/10356/169941 10.1103/PhysRevE.107.L022701 36932474 2-s2.0-85149633236 2 107 L022701-1 L022701-6 en Physical Review E © 2023 American Physical Society. All rights reserved. This paper was published in Physical Review E and is made available with permission of American Physical Society. application/pdf |
| spellingShingle | Engineering::Mechanical engineering Elastomer Films Environmental Stimuli Kang, Jingtian Liu, Suixin Li, Hua Light-induced wrinkling instability of confined annulus liquid crystal elastomer film |
| title | Light-induced wrinkling instability of confined annulus liquid crystal elastomer film |
| title_full | Light-induced wrinkling instability of confined annulus liquid crystal elastomer film |
| title_fullStr | Light-induced wrinkling instability of confined annulus liquid crystal elastomer film |
| title_full_unstemmed | Light-induced wrinkling instability of confined annulus liquid crystal elastomer film |
| title_short | Light-induced wrinkling instability of confined annulus liquid crystal elastomer film |
| title_sort | light induced wrinkling instability of confined annulus liquid crystal elastomer film |
| topic | Engineering::Mechanical engineering Elastomer Films Environmental Stimuli |
| url | https://hdl.handle.net/10356/169941 |
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