4D printed origami-inspired accordion, Kresling and Yoshimura tubes

Applying tessellated origami patterns to the design of mechanical materials can enhance properties such as strength-to-weight ratio and impact absorption ability. Another advantage is predictability deformation mechanics since typically deform through folding unfolding their creases. This work focuses on creating 4D printed flexible tubular based three different patterns: accordion, Kresling Yoshimura patterns, fabricated with a polylactic acid (PLA) filament heat-activated shape memory effect. The characteristics self-unfolding structures were then harnessed at 60°C, 75°C 90°C. Due differences in each design, significant behaviour observed during programming actuation. Among accordion proved be most effective for actuation overall structure compressed following crease lines. In comparison, pattern exhibited cracking locations deformation, while buckled did not fold expected To demonstrate potential application, an accordion-patterned tube use hand rehabilitation devices was designed tested proof-of-concept prototype incorporating origami.