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Mechanical properties of 3-D printed truss-like lattice biopolymer non-stochastic structures for sandwich panels with natural fibre composite skins. / Azzouz, Lyes; CHEN, Yong Kang; Zarrelli, Mauro; Pearce, Joshua M.; Mitchell, Leslie; Ren, Guogang; Grasso, Marzio.

In: Composite Structures, Vol. 213, 01.04.2019, p. 220-230.

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@article{9b3e47940b7048f9be2a0c3b590f2805,
title = "Mechanical properties of 3-D printed truss-like lattice biopolymer non-stochastic structures for sandwich panels with natural fibre composite skins",
abstract = "A full mechanical characterisation of three types of 3-D printed lattice cores was performed to evaluate the feasibility of using additive manufacturing (AM) of lightweight polymer-based sandwich panels for structural applications. Effects of the shape of three selected lattice structures on the compression, shear and bending strength has been experimentally investigated. The specimens tested were manufactured with an open source fused filament fabrication-based 3-D printer. These sandwich structures considered had skins made of polypropylene (PP)-flax bonded to the polylactic acid (PLA) lattice structure core using bi-component epoxy adhesive. The PP-flax and the PLA core structures were tested separately as well as bonded together to evaluate the structural performance as sandwich panels. The compression tests were carried out to assess the in-plane and out of plane stiffness and strength by selecting a representative number of cells. Shear band and plastic hinges were observed during the in-plane tests. The shear and three-point bending tests were performed according to the standard to ensure repeatability. The work has provided an insight into the failure modes of the different shapes, and the force-displacement history curves were linked to the progressive failure mechanisms experienced by the structures. Overall, the results of the three truss-like lattice biopolymer non-stochastic structures investigated have indicated that they are well suited to be used for potential impact applications because of their high-shear and out of the plane compression strength. These results demonstrate the feasibility of AM technology in manufacturing of lightweight polymer-based sandwich panels for potential structural uses",
keywords = "Biopolymers, Lattice structures, Natural fibre composites, PLA, Sandwich structure, Stochastic structures",
author = "Lyes Azzouz and CHEN, {Yong Kang} and Mauro Zarrelli and Pearce, {Joshua M.} and Leslie Mitchell and Guogang Ren and Marzio Grasso",
note = "{\circledC} 2019 Elsevier Ltd. All rights reserved.",
year = "2019",
month = "4",
day = "1",
doi = "10.1016/j.compstruct.2019.01.103",
language = "English",
volume = "213",
pages = "220--230",
journal = "Composite Structures",
issn = "0263-8223",
publisher = "Elsevier BV",

}

RIS

TY - JOUR

T1 - Mechanical properties of 3-D printed truss-like lattice biopolymer non-stochastic structures for sandwich panels with natural fibre composite skins

AU - Azzouz, Lyes

AU - CHEN, Yong Kang

AU - Zarrelli, Mauro

AU - Pearce, Joshua M.

AU - Mitchell, Leslie

AU - Ren, Guogang

AU - Grasso, Marzio

N1 - © 2019 Elsevier Ltd. All rights reserved.

PY - 2019/4/1

Y1 - 2019/4/1

N2 - A full mechanical characterisation of three types of 3-D printed lattice cores was performed to evaluate the feasibility of using additive manufacturing (AM) of lightweight polymer-based sandwich panels for structural applications. Effects of the shape of three selected lattice structures on the compression, shear and bending strength has been experimentally investigated. The specimens tested were manufactured with an open source fused filament fabrication-based 3-D printer. These sandwich structures considered had skins made of polypropylene (PP)-flax bonded to the polylactic acid (PLA) lattice structure core using bi-component epoxy adhesive. The PP-flax and the PLA core structures were tested separately as well as bonded together to evaluate the structural performance as sandwich panels. The compression tests were carried out to assess the in-plane and out of plane stiffness and strength by selecting a representative number of cells. Shear band and plastic hinges were observed during the in-plane tests. The shear and three-point bending tests were performed according to the standard to ensure repeatability. The work has provided an insight into the failure modes of the different shapes, and the force-displacement history curves were linked to the progressive failure mechanisms experienced by the structures. Overall, the results of the three truss-like lattice biopolymer non-stochastic structures investigated have indicated that they are well suited to be used for potential impact applications because of their high-shear and out of the plane compression strength. These results demonstrate the feasibility of AM technology in manufacturing of lightweight polymer-based sandwich panels for potential structural uses

AB - A full mechanical characterisation of three types of 3-D printed lattice cores was performed to evaluate the feasibility of using additive manufacturing (AM) of lightweight polymer-based sandwich panels for structural applications. Effects of the shape of three selected lattice structures on the compression, shear and bending strength has been experimentally investigated. The specimens tested were manufactured with an open source fused filament fabrication-based 3-D printer. These sandwich structures considered had skins made of polypropylene (PP)-flax bonded to the polylactic acid (PLA) lattice structure core using bi-component epoxy adhesive. The PP-flax and the PLA core structures were tested separately as well as bonded together to evaluate the structural performance as sandwich panels. The compression tests were carried out to assess the in-plane and out of plane stiffness and strength by selecting a representative number of cells. Shear band and plastic hinges were observed during the in-plane tests. The shear and three-point bending tests were performed according to the standard to ensure repeatability. The work has provided an insight into the failure modes of the different shapes, and the force-displacement history curves were linked to the progressive failure mechanisms experienced by the structures. Overall, the results of the three truss-like lattice biopolymer non-stochastic structures investigated have indicated that they are well suited to be used for potential impact applications because of their high-shear and out of the plane compression strength. These results demonstrate the feasibility of AM technology in manufacturing of lightweight polymer-based sandwich panels for potential structural uses

KW - Biopolymers

KW - Lattice structures

KW - Natural fibre composites

KW - PLA

KW - Sandwich structure

KW - Stochastic structures

UR - http://www.scopus.com/inward/record.url?scp=85060845270&partnerID=8YFLogxK

U2 - 10.1016/j.compstruct.2019.01.103

DO - 10.1016/j.compstruct.2019.01.103

M3 - Article

VL - 213

SP - 220

EP - 230

JO - Composite Structures

JF - Composite Structures

SN - 0263-8223

ER -