Geometrical Scaling Effects in the Mechanical Properties of 3D-Printed Body-Centered Cubic (BCC) Lattice Structures

This paper investigates size effects on the mechanical response of additively manufactured lattice structures based on a commercially available polylactic acid (PLA) polymer. Initial attention is focused on investigating geometrical effects in the mechanical properties of simple beams and cubes. Fol...

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Autores principales:	Alia Ruzanna Aziz, Jin Zhou, David Thorne, Wesley James Cantwell
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	scaling effects additive manufacturing PLA polymer lattice structures compression tests failure modes Organic chemistry QD241-441
Acceso en línea:	https://doaj.org/article/99c6f11372b44321bab2ddc5a002c967
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id	oai:doaj.org-article:99c6f11372b44321bab2ddc5a002c967
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spelling	oai:doaj.org-article:99c6f11372b44321bab2ddc5a002c9672021-11-25T18:48:51ZGeometrical Scaling Effects in the Mechanical Properties of 3D-Printed Body-Centered Cubic (BCC) Lattice Structures10.3390/polym132239672073-4360https://doaj.org/article/99c6f11372b44321bab2ddc5a002c9672021-11-01T00:00:00Zhttps://www.mdpi.com/2073-4360/13/22/3967https://doaj.org/toc/2073-4360This paper investigates size effects on the mechanical response of additively manufactured lattice structures based on a commercially available polylactic acid (PLA) polymer. Initial attention is focused on investigating geometrical effects in the mechanical properties of simple beams and cubes. Following this, a number of geometrically scaled lattice structures based on the body-centered cubic design were manufactured and tested in order to highlight size effects in their compression properties and failure modes. A finite element analysis was also conducted in order to compare the predicted modes of failure with those observed experimentally. Scaling effects were observed in the compression response of the PLA cubes, with the compression strength increasing by approximately 19% over the range of scale sizes investigated. Similar size-related effects were observed in the flexural samples, where a brittle mode of failure was observed at all scale sizes. Here, the flexural strength increased by approximately 18% when passing from the quarter size sample to its full-scale counterpart. Significant size effects were observed following the compression tests on the scaled lattice structures. Here, the compression strength increased by approximately 60% over the four sample sizes, in spite of the fact that similar failure modes were observed in all samples. Finally, reasonably good agreement was observed between the predicted failure modes and those observed experimentally. However, the FE models tended to over-estimate the mechanical properties of the lattice structures, probably as a result of the fact that the models were assumed to be defect free.Alia Ruzanna AzizJin ZhouDavid ThorneWesley James CantwellMDPI AGarticlescaling effectsadditive manufacturingPLA polymerlattice structurescompression testsfailure modesOrganic chemistryQD241-441ENPolymers, Vol 13, Iss 3967, p 3967 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	scaling effects additive manufacturing PLA polymer lattice structures compression tests failure modes Organic chemistry QD241-441
spellingShingle	scaling effects additive manufacturing PLA polymer lattice structures compression tests failure modes Organic chemistry QD241-441 Alia Ruzanna Aziz Jin Zhou David Thorne Wesley James Cantwell Geometrical Scaling Effects in the Mechanical Properties of 3D-Printed Body-Centered Cubic (BCC) Lattice Structures
description	This paper investigates size effects on the mechanical response of additively manufactured lattice structures based on a commercially available polylactic acid (PLA) polymer. Initial attention is focused on investigating geometrical effects in the mechanical properties of simple beams and cubes. Following this, a number of geometrically scaled lattice structures based on the body-centered cubic design were manufactured and tested in order to highlight size effects in their compression properties and failure modes. A finite element analysis was also conducted in order to compare the predicted modes of failure with those observed experimentally. Scaling effects were observed in the compression response of the PLA cubes, with the compression strength increasing by approximately 19% over the range of scale sizes investigated. Similar size-related effects were observed in the flexural samples, where a brittle mode of failure was observed at all scale sizes. Here, the flexural strength increased by approximately 18% when passing from the quarter size sample to its full-scale counterpart. Significant size effects were observed following the compression tests on the scaled lattice structures. Here, the compression strength increased by approximately 60% over the four sample sizes, in spite of the fact that similar failure modes were observed in all samples. Finally, reasonably good agreement was observed between the predicted failure modes and those observed experimentally. However, the FE models tended to over-estimate the mechanical properties of the lattice structures, probably as a result of the fact that the models were assumed to be defect free.
format	article
author	Alia Ruzanna Aziz Jin Zhou David Thorne Wesley James Cantwell
author_facet	Alia Ruzanna Aziz Jin Zhou David Thorne Wesley James Cantwell
author_sort	Alia Ruzanna Aziz
title	Geometrical Scaling Effects in the Mechanical Properties of 3D-Printed Body-Centered Cubic (BCC) Lattice Structures
title_short	Geometrical Scaling Effects in the Mechanical Properties of 3D-Printed Body-Centered Cubic (BCC) Lattice Structures
title_full	Geometrical Scaling Effects in the Mechanical Properties of 3D-Printed Body-Centered Cubic (BCC) Lattice Structures
title_fullStr	Geometrical Scaling Effects in the Mechanical Properties of 3D-Printed Body-Centered Cubic (BCC) Lattice Structures
title_full_unstemmed	Geometrical Scaling Effects in the Mechanical Properties of 3D-Printed Body-Centered Cubic (BCC) Lattice Structures
title_sort	geometrical scaling effects in the mechanical properties of 3d-printed body-centered cubic (bcc) lattice structures
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/99c6f11372b44321bab2ddc5a002c967
work_keys_str_mv	AT aliaruzannaaziz geometricalscalingeffectsinthemechanicalpropertiesof3dprintedbodycenteredcubicbcclatticestructures AT jinzhou geometricalscalingeffectsinthemechanicalpropertiesof3dprintedbodycenteredcubicbcclatticestructures AT davidthorne geometricalscalingeffectsinthemechanicalpropertiesof3dprintedbodycenteredcubicbcclatticestructures AT wesleyjamescantwell geometricalscalingeffectsinthemechanicalpropertiesof3dprintedbodycenteredcubicbcclatticestructures
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Geometrical Scaling Effects in the Mechanical Properties of 3D-Printed Body-Centered Cubic (BCC) Lattice Structures

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