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Shape Memory Alloy Laminate for Design of Self-folding Reconfigurable Structures
| Content Provider | Semantic Scholar |
|---|---|
| Author | Peraza-Hernandez, Edwin A. Hartl, Derek Lagoudas, D. |
| Copyright Year | 2013 |
| Abstract | In this work, we examine a self-folding material system that consists of an active laminate including two outer layers of thermally-actuated shape memory alloy (SMA) separated by a compliant passive layer. Localized SMA actuation enables control of the local Gaussian curvature anywhere in the sheet, allowing the initially planar laminate sheet to reconfigure into a 3D structure. The laminate extends the “programmable matter” concept since it can be formed and reconfigured in three dimensions without external manipulations. Two designs have been considered for the self-folding laminate sheet: one design proposes pre-strained thin SMA films for the outer layers of the laminate while the other proposes meshes of pre-strained SMA wires for such layers. The folding performances of these two designs are compared via finite element simulations. The results show that the mesh-based design provides tighter folds at any orientation than the film-based design for the same amount of volumespecific applied power. The mesh-based design shows other attractive qualities such as lower laminate density, less difficult SMA pre-straining process, and reduction of negative effects due to heat transfer between the SMA layers. However, the film-based design provides the advantage of a homogeneous and isotropic folding performance unlike the mesh-based design, where the folding performance depends on orientation and location of the heating zone. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://confsys.encs.concordia.ca/ICCM19/AllPapers/FinalVersion/HAR80982.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
