Fig. 4: The simulation and potential application of programmable and flexible wood-based origami electronics.

a Schematic diagram of creases. b FEM visualization of the wood-based origami electronic under different folding states. Blue and red color represent 0% and ≥5% strain, respectively. c Curves of stress versus strain generated from the FEM prediction. d Digital images of programmable and flexible wood-based origami electronics. e Schematic diagram of the circuit. f Potential application of wood-based origami electrons for the smart sensor. Curves of output current for monitoring movement of the knee (g) and elbow (h), respectively.