To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Movie S1. Deploy and collapse of a paper-folded triangulated cylinder pattern. Origami-inspired, on-demand deployable and collapsible mechanical metamaterials with tunable stiffness Zirui Zhai, Yong Wang, and Hanqing Jiang PNAS. 2018. 115:2032-2037 DOI: 10.1073/pnas.1720171115 Download Original Video Browse All Videos »