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Lookup NU author(s): Dr Xinwei LiORCiD
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND).
© 2023 The Author(s)Customizable stress plateau of lattice structure is sought-after for various engineering applications. In this study, we present a new design strategy to achieve customizable plateau, by introducing the concept of embedding self-similar structure in a face-centered cubic (FCC) lattice, which thereby constitutes a novel FCC hierarchical lattice (FCCH). These FCCH specimens were experimentally validated through quasi-static compression tests, on samples 3D-printed through selective laser melting using SS316L. These deformation characteristics were clarified by finite element analysis. The experimental and numerical results consistently show the serrated, dual, and upward plateaus were experienced for the 0th-order FCC, 1st-order FCCH, and 2nd-order FCCH structures, respectively. The mechanical reinforcements are based on the stronger interactions between unit cells induced by the embedded sub-structures. The deformation mechanisms dominated by hierarchical order are determined by horizontal layer-by-layer interaction as well as longitudinal buckling and collapse. The effect of geometric configuration show that stress plateau can be customized via optimizing different slave-cell sizes, connecting face-centers of lattice components, and arranging row layered gradient strategies.
Author(s): Wang X, Li Z, Li X, Wei K, Wang Z
Publication type: Article
Publication status: Published
Journal: Materials and Design
Year: 2023
Volume: 233
Print publication date: 01/09/2023
Online publication date: 24/07/2023
Acceptance date: 20/07/2023
Date deposited: 12/09/2023
ISSN (print): 0264-1275
ISSN (electronic): 1873-4197
Publisher: Elsevier Ltd
URL: https://doi.org/10.1016/j.matdes.2023.112186
DOI: 10.1016/j.matdes.2023.112186
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