Programmable Quasi-Zero Stiffness via 3D Printed Kresling-Origami Structures
摘要
Quasi-zero stiffness (QZS) systems, characterized by near-zero stiffness around their equilibrium point, are highly desirable for vibration isolation, soft robotics, and impact absorption applications. However, traditional QZS designs often rely on complex mechanical assemblies, which significantly limit their scalability and adaptability. To address these limitations, we propose an innovative approach that leverages the inherent nonlinear mechanics and tunable deformation modes of Kresling origami, a chiral cylindrical folding pattern. Through the strategic parallel arrangement of Kresling origami units with complementary positive and negative stiffness characteristics, we successfully realized lightweight, customizable QZS metamaterials. These structures were fabricated using a combination of two distinct 3D printing techniques and then manually assembled. This integration of origami-inspired mechanical design with additive manufacturing not only simplifies the construction process but also expands the potential of QZS systems in small-scale applications, particularly for vibration isolation and energy harvesting from low-frequency motions, such as those generated by the human body.