Tunable thermal transport in 4D printed mechanical metamaterials
Here the authors present an active thermal control system using 4Dprinted shape memory polymers and demonstrate how distinct deformation mechanisms lead to unique, tunable thermal properties using stretching- and bending-dominated architectures. Infrared thermography measurements with varying temper...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-07-01
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| Series: | Materials & Design |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0264127523004070 |
| _version_ | 1797794086068944896 |
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| author | Charles Abdol-Hamid Owens Yueping Wang Shiva Farzinazar Chen Yang Howon Lee Jaeho Lee |
| author_facet | Charles Abdol-Hamid Owens Yueping Wang Shiva Farzinazar Chen Yang Howon Lee Jaeho Lee |
| author_sort | Charles Abdol-Hamid Owens |
| collection | DOAJ |
| description | Here the authors present an active thermal control system using 4Dprinted shape memory polymers and demonstrate how distinct deformation mechanisms lead to unique, tunable thermal properties using stretching- and bending-dominated architectures. Infrared thermography measurements with varying temperature and compression settings show that at low strains, radiation drives the effective conductance increase as the view factors among the struts increase with increasing strain, and at higher strains, conduction drives the effective conductance increase as the strut-to-strut contact areas increase. The effective thermal conductance increases from 4.41mW/K to 14.52mW/K and from 3.23mW/K to 10.48mW/K for the Kelvin foam and octet-truss microlattices, respectively, as strain increases from 0% to approximately 70%. As the strain is adjusted, the stretching-dominated octet-truss architecture exhibits abrupt changes in shape and conductance due to buckling. The bending-dominated Kelvin foam architecture allows for gradual geometric changes and precise tuning of thermal conductance. These findings provide a new understanding of thermal transport phenomena in 4D-printed metamaterials, which may be a breakthrough in tunable thermal systems. |
| first_indexed | 2024-03-13T02:56:38Z |
| format | Article |
| id | doaj.art-914f88eef0be484cb7e478e4826e99de |
| institution | Directory Open Access Journal |
| issn | 0264-1275 |
| language | English |
| last_indexed | 2024-03-13T02:56:38Z |
| publishDate | 2023-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials & Design |
| spelling | doaj.art-914f88eef0be484cb7e478e4826e99de2023-06-28T04:28:24ZengElsevierMaterials & Design0264-12752023-07-01231111992Tunable thermal transport in 4D printed mechanical metamaterialsCharles Abdol-Hamid Owens0Yueping Wang1Shiva Farzinazar2Chen Yang3Howon Lee4Jaeho Lee5Department of Mechanical and Aerospace Engineering, University of California, Irvine, CA 92697, USADepartment of Mechanical and Aerospace Engineering, Rutgers, The State University of New Jersey, New Brunswick, NJ 08901, USADepartment of Mechanical and Aerospace Engineering, University of California, Irvine, CA 92697, USADepartment of Mechanical and Aerospace Engineering, Rutgers, The State University of New Jersey, New Brunswick, NJ 08901, USADepartment of Mechanical Engineering, Seoul National University, Seoul, South Korea; Corresponding authors.Department of Mechanical and Aerospace Engineering, University of California, Irvine, CA 92697, USA; Corresponding authors.Here the authors present an active thermal control system using 4Dprinted shape memory polymers and demonstrate how distinct deformation mechanisms lead to unique, tunable thermal properties using stretching- and bending-dominated architectures. Infrared thermography measurements with varying temperature and compression settings show that at low strains, radiation drives the effective conductance increase as the view factors among the struts increase with increasing strain, and at higher strains, conduction drives the effective conductance increase as the strut-to-strut contact areas increase. The effective thermal conductance increases from 4.41mW/K to 14.52mW/K and from 3.23mW/K to 10.48mW/K for the Kelvin foam and octet-truss microlattices, respectively, as strain increases from 0% to approximately 70%. As the strain is adjusted, the stretching-dominated octet-truss architecture exhibits abrupt changes in shape and conductance due to buckling. The bending-dominated Kelvin foam architecture allows for gradual geometric changes and precise tuning of thermal conductance. These findings provide a new understanding of thermal transport phenomena in 4D-printed metamaterials, which may be a breakthrough in tunable thermal systems.http://www.sciencedirect.com/science/article/pii/S0264127523004070Mechanical metamaterialsArchitected materialsThermal transportEffective conductance4D printingShape memory polymers |
| spellingShingle | Charles Abdol-Hamid Owens Yueping Wang Shiva Farzinazar Chen Yang Howon Lee Jaeho Lee Tunable thermal transport in 4D printed mechanical metamaterials Materials & Design Mechanical metamaterials Architected materials Thermal transport Effective conductance 4D printing Shape memory polymers |
| title | Tunable thermal transport in 4D printed mechanical metamaterials |
| title_full | Tunable thermal transport in 4D printed mechanical metamaterials |
| title_fullStr | Tunable thermal transport in 4D printed mechanical metamaterials |
| title_full_unstemmed | Tunable thermal transport in 4D printed mechanical metamaterials |
| title_short | Tunable thermal transport in 4D printed mechanical metamaterials |
| title_sort | tunable thermal transport in 4d printed mechanical metamaterials |
| topic | Mechanical metamaterials Architected materials Thermal transport Effective conductance 4D printing Shape memory polymers |
| url | http://www.sciencedirect.com/science/article/pii/S0264127523004070 |
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