Shape memory behavior and recovery force of 4D printed laminated Miura-origami structures subjected to compressive loading

Four-dimensionally (4D) printed origami structures have great potential for applications in actuators and reconfigurable devices by taking the advantages of 3D printing technology and shape memory polymers. This study focuses on the shape recovery progression of 4D printed laminated Miura-origami tessellations and tubes under compressive load-induced unfolding and folding. Recovery forces of the specimens are characterized by dynamic mechanical analysis (DMA) experiments. The shape recovery behavior and recovery force are significantly influenced by the shape recovery temperature and loading pattern. The high shape recovery capability of the specimens are signified by the shape recovery ratio of over 94% and volume changes of up to 289%. Lastly, the actuator application of a 4D printed laminated Miura-origami structure has been demonstrated.