| id |
cf2019_038 |
| authors |
El-Dabaa, Rana and Sherif Abdelmohsen |
| year |
2019 |
| title |
HMTM: Hygromorphic-Thermobimetal Composites as a Novel Approach to Enhance Passive Actuation of Adaptive Façades |
| source |
Ji-Hyun Lee (Eds.) "Hello, Culture!" [18th International Conference, CAAD Futures 2019, Proceedings / ISBN 978-89-89453-05-5] Daejeon, Korea, pp. 290-300 |
| summary |
Typical adaptive facades rely on mechanical actuators that respond to the outdoor climate and regulate its effect on indoor spaces. With the emergence of ubiquitous computing, several studies have independently utilized the latent properties of programmable materials, such as the hygroscopic properties of wood and the difference in expansion coefficient of metals, to passively program material response. Motion stimuli vary for each material however, involving changes in humidity and temperature fluctuation for wood and metals respectively. This paper introduces Hygromorphic-Thermobimetal (HMTM), as a low-tech low-cost passive programmable composite. A series of physical experiments are conducted to deduce design parameters that induce specific actuation mechanisms based on the stimulation of both hygroscopic properties in wood and metal expansion through temperature variation. This allows for an extended implementation of the hygroscopic properties of wood and its actuation configurations in hot arid climates, where variation in temperature, rather than humidity, is more dominant. |
| keywords |
Hygroscopic properties of wood, Passive actuation, Thermobimetals, Programmable materials, Adaptive façades |
| series |
CAAD Futures |
| email |
|
| full text |
 file.pdf (867,472 bytes) |
| references |
Content-type: text/plain
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| last changed |
2019/07/29 14:15 |
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