Browse by author
Lookup NU author(s): Dr Xinwei LiORCiD
Full text for this publication is not currently held within this repository. Alternative links are provided below where available.
© 2025 Elsevier Ltd. All rights are reserved, including those for text and data mining, AI training, and similar technologies.Inspired by the hierarchical structure of natural materials with high toughness and damage tolerance, this work proposes a new class of hierarchical interpenetrating lattice (HIL) metamaterials composed of macro-level primitive and micro-level gyroid lattice metamaterials. The HIL metamaterials are designed using a mathematical formula and fabricated via laser powder bed fusion using Ti-6Al-4V powder. The mechanical properties, deformation behaviors, failure mechanisms, and energy absorption performances of the proposed HIL metamaterials are analyzed using the finite element method and uniaxial compression tests. The results show that the mechanical properties and deformation behaviors of HIL metamaterials are governed by the proportion of micro-level gyroid lattice metamaterials, and the hierarchical interpenetration design effectively eliminates 45° shear band failure. Additionally, micro-level gyroid structures enhance load-bearing capacity of HIL metamaterials by redistributing stress and controlling failure modes. Compared to the macro-level primitive lattice metamaterials, the energy absorption of the proposed HIL metamaterials is improved by 610.7 %, surpassing even the combined performance of their sub-lattice metamaterials. This design strategy significantly enhances the energy absorption of lattice metamaterials fabricated from brittle materials, which has potential applications in impact buffering applications in aerospace and automotive industries.
Author(s): Zhang X, Zhao M, Li X, Tian C, Su F, Peng B, Zeng Z
Publication type: Article
Publication status: Published
Journal: Engineering Structures
Year: 2025
Volume: 345
Issue: Part B
Print publication date: 15/12/2025
Online publication date: 18/10/2025
Acceptance date: 09/10/2025
ISSN (print): 0141-0296
ISSN (electronic): 1873-7323
Publisher: Elsevier Ltd
URL: https://doi.org/10.1016/j.engstruct.2025.121549
DOI: 10.1016/j.engstruct.2025.121549
Altmetrics provided by Altmetric
