Shape-shifting panel from 3d-printed undulated ribbon lattice

摘要: Materials that change their shape in response to external stimuli opens up new prospects for efficient and versatile design shaping of three-dimensional objects. Here, we present a novel class micro-structures exhibiting an extension-bending coupling (EBC) effect, can be harnessed as elementary building block shape-shifting panels. They are built with single material network undulated ribbons. The deformations mechanisms both connected ribbons analysed using the finite element method explain main features EBC mechanism. For particular micro-structure proposed class, complete elastic stiffness tensor is computed combining two-scale homogenization Kirchhoff-Love plate theory. range achievable ratio then assessed respect geometric parameters unit cell. Patterned specimens manufactured commercial FFF Ultimaker 3-d printer mechanically tested at strain 20%. displacement measured by point tracking match predictions from simulations indicate structure maintain its properties strain. Moreover, tensile test load point-like boundary highlight exceptional out plane displacement. We envision these structures leveraged combination responsive materials actuation soft robots, compliant systems reconfigurable structures, alternatives mechanical motors, control power devices.