Spider-web-inspired multifunctional Ti-alloy lattice

Purpose Conventional strut-based lattices typically perform well in either total energy absorption or energy absorption efficiency, indicating a trade-off between these two metrics. To overcome this issue, the authors propose a novel spider-orb web-inspired lattice which aims to excel at both metrics. Design/methodology/approach Using finite element simulations, the geometrical parameters of the proposed lattice were optimized to maximize both total energy absorption and energy absorption efficiency. The developed structure was named the SW-Ti lattice, combining the terms spider web and the chemical symbol for titanium (Ti). Its energy absorption performance was compared with several of the most widely used truss-based lattice structures. Findings The results show that while conventional lattices either have high energy absorption efficiency or good total energy absorption metrics, the SW-Ti Lattice excels at both. Furthermore, the relatively flat stress–strain response during deformation indicates excellent crushing force efficiency and suggests potential applicability as a quasi-zero-stiffness material. Research limitations/implications The simulations are done using beam elements, which is known to show lower values for stress during compression and delayed densification. Finite element analysis using 3D elements and/or experiments are needed for better accuracy. Originality/value This study provides a method to combine biomimicry design with optimization for better performance of metamaterials, and by optimizing for energy absorption efficiency, the energy absorption performance increases while opening the possibility of use as quasi-zero stiffness material.