Session: 16-01-01: Poster Session: NSF-Funded Research (Grad & Undergrad)

Paper Number: 100040

100040 - Metamorphosis of Three Dimensional Modular Kirigami Tessellated Architected Matter 

Most shape-morphing materials are limited to one-to-one shape-changing processes, i.e., one design corresponds to one target shape, thus it is hard to be reshaped due to the constraint of limited mobilities (degrees of freedom). Here, we propose harnessing the kinematic bifurcation in mechanism for achieving enriched structural mobilities and enhanced reconfigurability in a new class of metamorphic and shape-reprogrammable tessellated 3D kirigami-inspired matter. The mechanism-based 3D kirigami module exhibits three transformation modes accompanied by kinematic bifurcations. The 3D kirigami module under two of the kinematic transformation paths can form with internal structual loops whose reconfiguration kinematics can be accurately predicted and captured through the developed kinematics modeling based on the transformation matrix for spatial mechanisms. Then, based on the 3D kirigami module, two different building blocks are proposed with compatible and continous deformation features, which can change shape into divergent shapes including trucks, flights and bridges, etc. Later, based on these two building blocks, rational design of planar tiling of 3D kirigami modules forms quasi-3D tessellated kirigami matter in two planar forms. The tessellated 3D-kirigami matter are designed with two types, e.g. one with dilute periodic structual form while another one with a totally compact foem. The tessellated kirigami matter possesses rich mobilities enabled by the inherited kinematic bifurcation in the base module, thus, it is capable of undergoing analogical metamorphosis by evolving into varieties of transformable 3D architecture, as well as further becoming a pluripotent matter that could be reprogrammed into tessellated surfaces with arbitrary curvatures through both forward and inverse design.  In the forward shape changing processes, both the two tessellated matters can transfigure into a large number of different configurations with various geometriacal topologies. In the inverse design, target shapes with negtive, zero and positive Guassian curvatures can be achieved by using a disceretized method to determine the local vetoral curvatures. Special shapes like spherical, saddle and cylinder shapes have been successfully imitated with small errors. Both the foreard and inverse shape changing features of the two tessellated kirigami matters demonstrate their re-programmabilities. Specially, it is found this shape re-programmability is independent with the stiffness of internal hinges, which benefits one of special deformed structure capable of to be re-shaped with programmable structural stiffness, which are experimentally verified by obtaining one pyramid structure with free-rotated hinges while another saddle shaped structure with platically deformable metal hinges. The tessellated metamorphic 3D kirigami-inspired matter is attractive for potential applications in reconfigurable architected materials and modular robots.

Presenting Author: Yanbin Li North Carolina State University

Presenting Author Biography: PhD North Carolina State University

Authors:

Yanbin Li North Carolina State University
Jie Yin North Carolina State University