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Regulation of notch sensitivity of lattice materials by strut topology

Li, Kan, Seiler, Philipp E., Deshpande, Vikram S., Fleck, Norman A. (2021) Regulation of notch sensitivity of lattice materials by strut topology. International Journal of Mechanical Sciences, 192 . Article Number 106137. (doi:10.1016/j.ijmecsci.2020.106137) (KAR id:89116)

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https://doi.org/10.1016/j.ijmecsci.2020.106137

Abstract

We propose a local reinforcement technique for lattices in the vicinity of a stress-raiser such as a notch, in order to elevate the macroscopic strength and ductility. A spatially non-uniform waviness distribution of sinusoidally-shaped struts is assumed in the vicinity of the notch, and the sensitivity of macroscopic tensile response to strut waviness distribution is studied by finite element analysis. Optimized lattice structures are determined in order to maximise the macroscopic tensile strength or ductility from these various strut waviness distributions. Both hexagonal and triangular lattices are studied as these geometries are representative of bending-dominated and stretching-dominated lattices, respectively.

Item Type: Article
DOI/Identification number: 10.1016/j.ijmecsci.2020.106137
Uncontrolled keywords: lattice materials, ductile, tensile strength, graded wavy, defect sensitivity
Subjects: T Technology > TJ Mechanical engineering and machinery
Divisions: Divisions > Division of Computing, Engineering and Mathematical Sciences > School of Engineering and Digital Arts
Depositing User: Philipp Seiler
Date Deposited: 09 Jul 2021 20:17 UTC
Last Modified: 09 Jul 2021 20:17 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/89116 (The current URI for this page, for reference purposes)
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