Printed bistable structures that deploy and reconfigure
2017–2021
Deployable structures ship flat but tend to deploy imprecisely and cannot bear load once open. We build reconfigurable structures from a single multi-material 3D print whose deployed states are prescribed, stable, and load-bearing. The unit is a bistable actuator that snaps between two stable states; pairing it with a shape-memory polymer makes deployment autonomous and sequenceable, triggered by ambient heat with no power. An inverse-design method discretizes any target surface as a Chebyshev net and places actuators along the diagonals, so one flat print reconfigures into multiple distinct, stable, curved surfaces.
References
- Chen T, Mueller J, Shea K. Integrated design and simulation of tunable, multi-state structures fabricated monolithically with multi-material 3D printing. Scientific Reports 7, 45671 (2017).
- Chen T, Shea K. An autonomous programmable actuator and shape reconfigurable structures using bistability and shape memory polymers. 3DP+ 5(2), 91–101 (2018).
- Chen T, Shea K. Computational design of multi-stable, reconfigurable surfaces. Materials & Design 205, 109688 (2021).