Low velocity impact response of 3D printed structures formed by cellular metamaterials and stiffening plates: PLA vs. PETg

Filipe Amarante Santos; Hugo Rebelo; M. Coutinho; L. S. Sutherland; Corneliu Cismasiu; I. Farina; F. Fraternali

doi:10.1016/j.compstruct.2020.113128

Low velocity impact response of 3D printed structures formed by cellular metamaterials and stiffening plates: PLA vs. PETg

Filipe Amarante Santos, Hugo Rebelo, M. Coutinho, L. S. Sutherland, Corneliu Cismasiu, I. Farina, F. Fraternali

DEC - Departamento de Engenharia Civil

Research output: Contribution to journal › Article › peer-review

17 Citations (Scopus)

Abstract

This work studies the low-velocity impact response of 3D-printed layered structures made of thermoplastic materials (PLA and PETg), which form sacrificial claddings for impact protection. The analyzed structures are composed of crushable cellular cores placed in between terminal stiffening plates. The cores tessellate either honeycomb hexagonal unit cells, or hexagonal cells with re-entrant corners, with the latter exhibiting auxetic response. The given results highlight that the examined PETg protectors exhibit higher energy dissipation ratios and lower restitution coefficients, as compared to PLA structures that have the same geometry. It is concluded that PETg qualifies as an useful material for the fabrication of effective impact protection gear through ordinary, low-cost 3D printers.

Original language	English
Article number	113128
Journal	Composite Structures
Volume	256
DOIs	https://doi.org/10.1016/j.compstruct.2020.113128
Publication status	Published - 15 Jan 2021

Keywords

Auxetic response
Cellular metamaterials
Low velocity impact
PETg
PLA

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10.1016/j.compstruct.2020.113128

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title = "Low velocity impact response of 3D printed structures formed by cellular metamaterials and stiffening plates: PLA vs. PETg",

abstract = "This work studies the low-velocity impact response of 3D-printed layered structures made of thermoplastic materials (PLA and PETg), which form sacrificial claddings for impact protection. The analyzed structures are composed of crushable cellular cores placed in between terminal stiffening plates. The cores tessellate either honeycomb hexagonal unit cells, or hexagonal cells with re-entrant corners, with the latter exhibiting auxetic response. The given results highlight that the examined PETg protectors exhibit higher energy dissipation ratios and lower restitution coefficients, as compared to PLA structures that have the same geometry. It is concluded that PETg qualifies as an useful material for the fabrication of effective impact protection gear through ordinary, low-cost 3D printers.",

keywords = "Auxetic response, Cellular metamaterials, Low velocity impact, PETg, PLA",

author = "Santos, {Filipe Amarante} and Hugo Rebelo and M. Coutinho and Sutherland, {L. S.} and Corneliu Cismasiu and I. Farina and F. Fraternali",

note = "F.F. acknowledges financial support from MIUR under the PRIN 2017 National Grant 'Multiscale Innovative Materials and Structures'(Grant No. 2017J4EAYB). F.S. acknowledges the support from the Centro de Competancias para a Protecao de Infraestruturas (CCPI) of the Military Academy, during the experimental tests.",

year = "2021",

month = jan,

day = "15",

doi = "10.1016/j.compstruct.2020.113128",

language = "English",

volume = "256",

journal = "Composite Structures",

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T1 - Low velocity impact response of 3D printed structures formed by cellular metamaterials and stiffening plates

T2 - PLA vs. PETg

AU - Santos, Filipe Amarante

AU - Rebelo, Hugo

AU - Coutinho, M.

AU - Sutherland, L. S.

AU - Cismasiu, Corneliu

AU - Farina, I.

AU - Fraternali, F.

N1 - F.F. acknowledges financial support from MIUR under the PRIN 2017 National Grant 'Multiscale Innovative Materials and Structures'(Grant No. 2017J4EAYB). F.S. acknowledges the support from the Centro de Competancias para a Protecao de Infraestruturas (CCPI) of the Military Academy, during the experimental tests.

PY - 2021/1/15

Y1 - 2021/1/15

N2 - This work studies the low-velocity impact response of 3D-printed layered structures made of thermoplastic materials (PLA and PETg), which form sacrificial claddings for impact protection. The analyzed structures are composed of crushable cellular cores placed in between terminal stiffening plates. The cores tessellate either honeycomb hexagonal unit cells, or hexagonal cells with re-entrant corners, with the latter exhibiting auxetic response. The given results highlight that the examined PETg protectors exhibit higher energy dissipation ratios and lower restitution coefficients, as compared to PLA structures that have the same geometry. It is concluded that PETg qualifies as an useful material for the fabrication of effective impact protection gear through ordinary, low-cost 3D printers.

AB - This work studies the low-velocity impact response of 3D-printed layered structures made of thermoplastic materials (PLA and PETg), which form sacrificial claddings for impact protection. The analyzed structures are composed of crushable cellular cores placed in between terminal stiffening plates. The cores tessellate either honeycomb hexagonal unit cells, or hexagonal cells with re-entrant corners, with the latter exhibiting auxetic response. The given results highlight that the examined PETg protectors exhibit higher energy dissipation ratios and lower restitution coefficients, as compared to PLA structures that have the same geometry. It is concluded that PETg qualifies as an useful material for the fabrication of effective impact protection gear through ordinary, low-cost 3D printers.

KW - Auxetic response

KW - Cellular metamaterials

KW - Low velocity impact

KW - PETg

KW - PLA

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VL - 256

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JF - Composite Structures

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M1 - 113128

ER -

Low velocity impact response of 3D printed structures formed by cellular metamaterials and stiffening plates: PLA vs. PETg

Abstract

Keywords

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