Additive manufacturing technology has enabled the production of lattice materials with virtually unlimited unit cell geometries, making it possible to design new lattice materials with high energy absorption efficiency. In this study, we present two newly designed two-dimensional lattice materials with in-plane isotropic (elastic) mechanical properties: the Mixed Hexagonal-Triangular lattice and the Hierarchical Triangular lattice. To investigate their in-plane energy absorption and crushing behaviour, we conducted finite element analyses and compared the results with those of two existing lattice materials: the hexagonal and triangular-triangular lattices. To compare the energy absorption and crushing behaviours of the lattices under three distinct deformation modes, four distinct metrics were employed. The results show that the Mixed Hexagonal-Triangular lattice exhibited 25%, 16%, and 22% higher energy absorption capacity than the hexagonal lattice and 122%, 86%, and 16% higher energy absorption than the triangular-triangular lattice for quasi-static, transition, and dynamic modes, respectively. On the other hand, the Hierarchical Triangular lattice showed 25%, 12%, and 5% higher energy absorption capacity than the hexagonal lattice and 122%, 80%, and 1% higher energy absorption than the triangular-triangular lattice for quasi-static, transition, and dynamic modes, respectively. Overall, this study demonstrates that the developed lattice materials are significant competitors to hexagonal and other classical lattice materials in terms of energy absorption applications.
Acknowledgements:
The authors gratefully acknowledge the financial support of TÜBÝTAK (Project Title: Design of New Multi-Functional Lattice Materials; Project No: 219M296 ORCID NO: 0009-0003-9290-2705
Anahtar Kelimeler: Lattice Materials, Energy Absorption, Crushing Behavior, Finite Element Analysis
|
