Bioinspired functionally graded Vorochiral metamaterials with enhanced energy absorption and dissipation

Wang, Hao, Jiang, Jian, Kadir, Mohammed Rafiq Abdul, Bosiakov, Sergei, Zhu, Hanxing ORCID: https://orcid.org/0000-0002-3209-6831 and Lyu, Yongtao 2026. Bioinspired functionally graded Vorochiral metamaterials with enhanced energy absorption and dissipation. Journal of Materials Research and Technology 45 , pp. 4164-4182. 10.1016/j.jmrt.2026.10.071

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Abstract

Designing bioinspired functionally graded metamaterials with tailored energy absorption (EA) and energy dissipation (ED) capacities through spatially regulating structural topology and local relative density distribution without increasing the overall material volume, remains a significant challenge. In this study, bioinspired functionally graded Vorochiral (BFG-VC) metamaterials were developed through the spatial modulation of chiral topologies, drawing inspiration from heterogeneous biological tissues. The EA capacity and deformation behavior of the BFG-VC metamaterial under quasi-static compression were systematically investigated. The finite element models developed in this work were validated using experimental testing, and dynamic rebound experiments were conducted to assess the ED capacity. The BFG-VC metamaterial exhibited up to a 78.85% improvement in EA compared to the conventional chiral metamaterial and demonstrated a tunable stress-deformation behavior enabled by BFG characteristics. The BFG-VC metamaterials displayed stress-strain responses with a well-defined, multi-step plateau characterized by an increased number of transitional stress fluctuations. Under low-velocity impact loading, the BFG-VC metamaterials outperformed the conventional chiral metamaterial in terms of ED. This superior synergistic static-dynamic performance demonstrates that the spatial modulation of Vorochiral architectures provides a highly effective design paradigm for advanced applications.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Schools > Engineering
Date of First Compliant Deposit:	13 October 2026
Date of Acceptance:	9 October 2026
Last Modified:	13 Oct 2026 10:00
URI:	https://orca.cardiff.ac.uk/id/eprint/190190

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