Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | 최준명 | - |
dc.date.accessioned | 2019-03-06T02:36:47Z | - |
dc.date.available | 2019-03-06T02:36:47Z | - |
dc.date.issued | 2017-01 | - |
dc.identifier.citation | COMPUTATIONAL MECHANICS, v. 59, No. 1, Page. 147-160 | en_US |
dc.identifier.issn | 0178-7675 | - |
dc.identifier.uri | https://link.springer.com/article/10.1007/s00466-016-1340-9 | - |
dc.identifier.uri | https://repository.hanyang.ac.kr/handle/20.500.11754/100507 | - |
dc.description.abstract | In a nematic solid, wherein liquid crystal molecules are incorporated into polymeric chains, the chromophore phase is projected onto the polymer conformation, changing the stress-free configuration metric. Stimulated actuation cannot be separated from the structure itself, since the mesoscopic polymer properties dictate the degree and type of shape change. In this research, we focused on self-deforming device programming, inspired by recent optical techniques, to pattern nontrivial alignment textures and induce exotic strain fields on specimens. A finite-element framework incorporating a light-thermo-order coupled constitutive relation and geometric nonlinearities was utilized to compute mechanical deformations for given external stimuli. The distortion of planar strips into various exotic 3D shapes was simulated, and disclination-defect-like liquid crystal texture topographies with different defect strengths produced various many-poled shapes upon irradiation, as observed experimentally. The effects of the boundary conditions and geometric nonlinearities were also examined, exemplifying the need for a comprehensive finite-element-based framework. The same method was applied to textures naturally emerging due to static distortion, and the effects of the prescribed inhomogeneities on the overall deformations, which is the basis of inverse design, were observed. Furthermore, we analyzed the local Poisson-effect-induced instability resulting from inscribing a hedgehog disclination texture onto a solid; the onset of buckling-like deformations was observed energetically, and the relations between this onset and other physical properties were elucidated to enable microstate design while maintaining structural stability. These results will facilitate the development and comprehension of the mechanisms of remotely light-controlled self-assembly and propulsion systems that may soon be realized. | en_US |
dc.description.sponsorship | This work was supported by the NationalResearch Foundation of Korea (NRF) grant funded by the Korean government (MSIP) (No. 2012R1A3A2048841). | en_US |
dc.language.iso | en_US | en_US |
dc.publisher | SPRINGER | en_US |
dc.subject | Finite-element analysis | en_US |
dc.subject | Multiphysics | en_US |
dc.subject | Nematic solids | en_US |
dc.subject | Optical textures | en_US |
dc.subject | Smart materials | en_US |
dc.subject | CRYSTAL POLYMER NETWORKS | en_US |
dc.subject | LIQUID-CRYSTAL | en_US |
dc.subject | MACROSCOPIC DEFORMATION | en_US |
dc.subject | ELASTOMERS | en_US |
dc.subject | ACTUATORS | en_US |
dc.subject | BEHAVIOR | en_US |
dc.subject | FILMS | en_US |
dc.subject | COMPOSITES | en_US |
dc.subject | DESIGN | en_US |
dc.subject | ENERGY | en_US |
dc.title | Finite-element analysis of the optical-texture-mediated photoresponse in a nematic strip | en_US |
dc.type | Article | en_US |
dc.identifier.doi | 10.1007/s00466-016-1340-9 | - |
dc.relation.journal | COMPUTATIONAL MECHANICS | - |
dc.contributor.googleauthor | Chung, Hayoung | - |
dc.contributor.googleauthor | Yun, Jung-Hoon | - |
dc.contributor.googleauthor | Choi, Joonmyung | - |
dc.contributor.googleauthor | Cho, Maenghyo | - |
dc.relation.code | 2017001905 | - |
dc.sector.campus | E | - |
dc.sector.daehak | COLLEGE OF ENGINEERING SCIENCES[E] | - |
dc.sector.department | DEPARTMENT OF MECHANICAL ENGINEERING | - |
dc.identifier.pid | joonchoi | - |
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