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Continuous graded Gyroid cellular structures fabricated by selective laser melting: Design, manufacturing and mechanical properties

Continuous graded Gyroid cellular structures fabricated by selective laser melting: Design, manufacturing and mechanical properties
Continuous graded Gyroid cellular structures fabricated by selective laser melting: Design, manufacturing and mechanical properties

Functional graded cellular materials (FGCMs) have attracted increasing attentions for their improved properties when compared to uniform cellular structures. In this work, graded Gyroid cellular structures (GCSs) with varying gradient directions were designed and manufactured via selective laser melting (SLM). As a reference, uniform structures were also manufactured. The surface morphology and mechanical response of these structures under compressive loads were investigated. Results indicate high manufacturability and repeatability of GCSs manufactured by SLM. Optimized density distribution gives these structures novel deformation and mechanical properties. GCSs with density gradient perpendicular to the loading direction exhibit deformation behaviours similar to uniform ones, while GCSs with the gradient parallel to the loading direction exhibit layer-by-layer deformation and collapse behaviour. A novel phenomenon of sub-layer collapses is found in GCSs with gradient parallel to the loading direction. Furthermore, mathematical models were developed to predict and customize the mechanical properties of graded cellular structures by optimizing the relative density of each layer. These significant findings illustrate that graded cellular structures have high application prospect in various industries, particularly given the fact that additive manufacturing has been an enabler of cellular structure fabrication.

Compressive response, Energy absorption, Graded cellular structure, Selective laser melting, Triply periodic minimal surface
0264-1275
394-404
Yang, Lei
3374a6c7-e285-4014-a301-ad6cea7251af
Mertens, Raya
3f09123a-947a-4c09-a537-5e408a4308d4
Ferrucci, Massimiliano
64c091db-2b40-42d8-b44d-0d6c6b6ffaa4
Yan, Chunze
429c7099-992f-46df-b714-b50ae2980d98
Shi, Yusheng
c5e10cdc-0c6e-4de9-877d-9b83955e0955
Yang, Shoufeng
e0018adf-8123-4a54-b8dd-306c10ca48f1
Yang, Lei
3374a6c7-e285-4014-a301-ad6cea7251af
Mertens, Raya
3f09123a-947a-4c09-a537-5e408a4308d4
Ferrucci, Massimiliano
64c091db-2b40-42d8-b44d-0d6c6b6ffaa4
Yan, Chunze
429c7099-992f-46df-b714-b50ae2980d98
Shi, Yusheng
c5e10cdc-0c6e-4de9-877d-9b83955e0955
Yang, Shoufeng
e0018adf-8123-4a54-b8dd-306c10ca48f1

Yang, Lei, Mertens, Raya, Ferrucci, Massimiliano, Yan, Chunze, Shi, Yusheng and Yang, Shoufeng (2019) Continuous graded Gyroid cellular structures fabricated by selective laser melting: Design, manufacturing and mechanical properties. Materials and Design, 162, 394-404. (doi:10.1016/j.matdes.2018.12.007).

Record type: Article

Abstract

Functional graded cellular materials (FGCMs) have attracted increasing attentions for their improved properties when compared to uniform cellular structures. In this work, graded Gyroid cellular structures (GCSs) with varying gradient directions were designed and manufactured via selective laser melting (SLM). As a reference, uniform structures were also manufactured. The surface morphology and mechanical response of these structures under compressive loads were investigated. Results indicate high manufacturability and repeatability of GCSs manufactured by SLM. Optimized density distribution gives these structures novel deformation and mechanical properties. GCSs with density gradient perpendicular to the loading direction exhibit deformation behaviours similar to uniform ones, while GCSs with the gradient parallel to the loading direction exhibit layer-by-layer deformation and collapse behaviour. A novel phenomenon of sub-layer collapses is found in GCSs with gradient parallel to the loading direction. Furthermore, mathematical models were developed to predict and customize the mechanical properties of graded cellular structures by optimizing the relative density of each layer. These significant findings illustrate that graded cellular structures have high application prospect in various industries, particularly given the fact that additive manufacturing has been an enabler of cellular structure fabrication.

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More information

Accepted/In Press date: 3 December 2018
e-pub ahead of print date: 6 December 2018
Published date: 15 January 2019
Keywords: Compressive response, Energy absorption, Graded cellular structure, Selective laser melting, Triply periodic minimal surface

Identifiers

Local EPrints ID: 427016
URI: http://eprints.soton.ac.uk/id/eprint/427016
ISSN: 0264-1275
PURE UUID: 74b3254b-75d2-490e-85f7-b67fe47061c0
ORCID for Shoufeng Yang: ORCID iD orcid.org/0000-0002-3888-3211

Catalogue record

Date deposited: 20 Dec 2018 17:30
Last modified: 25 Nov 2021 21:51

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Contributors

Author: Lei Yang
Author: Raya Mertens
Author: Massimiliano Ferrucci
Author: Chunze Yan
Author: Yusheng Shi
Author: Shoufeng Yang ORCID iD

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