Design and mechanical behavior of hyperbolic weaves with naturally curved ribbons.

Abstract

One important technique for morphological transition is weaving, structure weaves with in-plane curved ribbons have smoother structural configurations and less topological flaws. The design and production of a hyperbolic woven structure (negative Gaussian curvature) is not covered in the aforementioned paper, and we think that a hyperbolic woven structure with smooth geometric features has to have unique mechanical qualities. The new hyperbolic structure created by weaving in-plane curved ribbons was suggested in this study. The ribbon was manufactured using 3D print technology based on geometric design. Mechanical Behavior of hyperbolic weave structure with naturally in-plane curved ribbons under vertical compression was investigated through tests and finite elements. It was found that the failure modes of hyperbolic weave structure under vertical loading was the "ridge" buckling of the structure. A finite element model, including detailed modeling of ribbon joint connections, was established using bending modeling method. It was demonstrated that, the aspect ratios, ribbon width and thickness have a great effect on the buckling behavior of hyperbolic weaves. The high load capacity and strong stability of hyperbolic weaves with thicker or wider ribbons were exhibited by test and FEM. In addition, through theoretical analysis, we established the buckling theoretical model of hyperbolic woven structure, and the exact buckling load formula was proposed.