A flat multi-material 3D print that deploys into a stable doubly-curved 3D structure

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

  1. 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).
  2. Chen T, Shea K. An autonomous programmable actuator and shape reconfigurable structures using bistability and shape memory polymers. 3DP+ 5(2), 91–101 (2018).
  3. Chen T, Shea K. Computational design of multi-stable, reconfigurable surfaces. Materials & Design 205, 109688 (2021).