CUED Publications database

Regulation of notch sensitivity of lattice materials by strut topology

Li, K and Seiler, PE and Deshpande, VS and Fleck, NA (2021) Regulation of notch sensitivity of lattice materials by strut topology. International Journal of Mechanical Sciences, 192. ISSN 0020-7403

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Abstract

© 2020 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
Uncontrolled Keywords: cond-mat.mtrl-sci cond-mat.mtrl-sci
Subjects: UNSPECIFIED
Divisions: Div C > Materials Engineering
Depositing User: Cron Job
Date Deposited: 16 Oct 2020 20:11
Last Modified: 19 Nov 2020 09:33
DOI: 10.1016/j.ijmecsci.2020.106137