Shell-Forming Stimulus-Active Hydrogel Composite Membranes: Concept and Modeling
The swelling of active hydrogels combined with passive layers allows the design of shell-forming structures. A shell-like structure offers different properties than a flat structure, e.g., variations in bending stiffness across different directions. A drastic increase of the bending stiffness is fav...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-05-01
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| Series: | Micromachines |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2072-666X/11/6/541 |
| _version_ | 1797566949530533888 |
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| author | Adrian Ehrenhofer Thomas Wallmersperger |
| author_facet | Adrian Ehrenhofer Thomas Wallmersperger |
| author_sort | Adrian Ehrenhofer |
| collection | DOAJ |
| description | The swelling of active hydrogels combined with passive layers allows the design of shell-forming structures. A shell-like structure offers different properties than a flat structure, e.g., variations in bending stiffness across different directions. A drastic increase of the bending stiffness is favorable e.g., in rollable/flexible displays: in their unrolled form, they have to be stiff enough to resist bending due to dead weight. At the same time, they have to be flexible enough to be rolled-up. This can be achieved by shell-forming. In the current modeling and simulation work, we present a basic concept of combined active–passive composites and demonstrate how they form shells. As the example material class, we use hydrogels with isotropic swelling capabilities. We demonstrate how to model the combined mechanical behavior with the Temperature-Expansion-Model. Afterwards, we show numerical results obtained by Finite Element simulations. We conclude that the envisioned structure has a great potential for obtaining soft rollable sheets that can be stiffened by intrinsic activation. |
| first_indexed | 2024-03-10T19:34:42Z |
| format | Article |
| id | doaj.art-699a24b45fb54560bbd84c942fac9bee |
| institution | Directory Open Access Journal |
| issn | 2072-666X |
| language | English |
| last_indexed | 2024-03-10T19:34:42Z |
| publishDate | 2020-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Micromachines |
| spelling | doaj.art-699a24b45fb54560bbd84c942fac9bee2023-11-20T01:50:02ZengMDPI AGMicromachines2072-666X2020-05-0111654110.3390/mi11060541Shell-Forming Stimulus-Active Hydrogel Composite Membranes: Concept and ModelingAdrian Ehrenhofer0Thomas Wallmersperger1Institute of Solid Mechanics, Technische Universität Dresden, 01062 Dresden, GermanyInstitute of Solid Mechanics, Technische Universität Dresden, 01062 Dresden, GermanyThe swelling of active hydrogels combined with passive layers allows the design of shell-forming structures. A shell-like structure offers different properties than a flat structure, e.g., variations in bending stiffness across different directions. A drastic increase of the bending stiffness is favorable e.g., in rollable/flexible displays: in their unrolled form, they have to be stiff enough to resist bending due to dead weight. At the same time, they have to be flexible enough to be rolled-up. This can be achieved by shell-forming. In the current modeling and simulation work, we present a basic concept of combined active–passive composites and demonstrate how they form shells. As the example material class, we use hydrogels with isotropic swelling capabilities. We demonstrate how to model the combined mechanical behavior with the Temperature-Expansion-Model. Afterwards, we show numerical results obtained by Finite Element simulations. We conclude that the envisioned structure has a great potential for obtaining soft rollable sheets that can be stiffened by intrinsic activation.https://www.mdpi.com/2072-666X/11/6/541hydrogelsrollable/flexible displaysmodeling and simulationshell-formingcorrugated sheets |
| spellingShingle | Adrian Ehrenhofer Thomas Wallmersperger Shell-Forming Stimulus-Active Hydrogel Composite Membranes: Concept and Modeling Micromachines hydrogels rollable/flexible displays modeling and simulation shell-forming corrugated sheets |
| title | Shell-Forming Stimulus-Active Hydrogel Composite Membranes: Concept and Modeling |
| title_full | Shell-Forming Stimulus-Active Hydrogel Composite Membranes: Concept and Modeling |
| title_fullStr | Shell-Forming Stimulus-Active Hydrogel Composite Membranes: Concept and Modeling |
| title_full_unstemmed | Shell-Forming Stimulus-Active Hydrogel Composite Membranes: Concept and Modeling |
| title_short | Shell-Forming Stimulus-Active Hydrogel Composite Membranes: Concept and Modeling |
| title_sort | shell forming stimulus active hydrogel composite membranes concept and modeling |
| topic | hydrogels rollable/flexible displays modeling and simulation shell-forming corrugated sheets |
| url | https://www.mdpi.com/2072-666X/11/6/541 |
| work_keys_str_mv | AT adrianehrenhofer shellformingstimulusactivehydrogelcompositemembranesconceptandmodeling AT thomaswallmersperger shellformingstimulusactivehydrogelcompositemembranesconceptandmodeling |