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GAM: General Auxetic Metamaterial with Tunable 3D Auxetic Behavior Using the Same Unit Cell Boundary Connectivity

Research on auxetic metamaterials is important due to their high performance against impact loadings and their usefulness in actuators, among other applications. These metamaterials offer a negative Poisson’s ratio at the macro level. However, usual auxetic metamaterials face challenges in (1) gradi...

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Autores principales: Ben-Yelun, Ismael, Gómez-Carano, Guillermo, San Millán, Francisco J., Sanz, Miguel Ángel, Montáns, Francisco Javier, Saucedo-Mora, Luis
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10180246/
https://www.ncbi.nlm.nih.gov/pubmed/37176354
http://dx.doi.org/10.3390/ma16093473
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author Ben-Yelun, Ismael
Gómez-Carano, Guillermo
San Millán, Francisco J.
Sanz, Miguel Ángel
Montáns, Francisco Javier
Saucedo-Mora, Luis
author_facet Ben-Yelun, Ismael
Gómez-Carano, Guillermo
San Millán, Francisco J.
Sanz, Miguel Ángel
Montáns, Francisco Javier
Saucedo-Mora, Luis
author_sort Ben-Yelun, Ismael
collection PubMed
description Research on auxetic metamaterials is important due to their high performance against impact loadings and their usefulness in actuators, among other applications. These metamaterials offer a negative Poisson’s ratio at the macro level. However, usual auxetic metamaterials face challenges in (1) grading the effect, (2) coupling and combining auxetic metamaterials with non-auxetic materials due to boundary compatibility, (3) obtaining the same auxetic behavior in all directions in the transverse plane, and (4) adapting the regular geometry to the component design boundary and shape. The goal of this paper is to present a novel, recently patented tunable 3D metamaterial created to reproduce a wide spectrum of 3D auxetic and non-auxetic Poisson’s ratios and Young’s moduli. This wide range is obtained using the same basic unit cell geometry and boundary connections with neighboring cells, facilitating designs using functionally graded metamaterials as only the connectivity and position of the cell’s internal nodes are modified. Based on simple spatial triangularization, the metamaterial is easily scalable and better accommodates spatial curvatures or boundaries by changing the locations of nodes and lengths of bars.
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spelling pubmed-101802462023-05-13 GAM: General Auxetic Metamaterial with Tunable 3D Auxetic Behavior Using the Same Unit Cell Boundary Connectivity Ben-Yelun, Ismael Gómez-Carano, Guillermo San Millán, Francisco J. Sanz, Miguel Ángel Montáns, Francisco Javier Saucedo-Mora, Luis Materials (Basel) Article Research on auxetic metamaterials is important due to their high performance against impact loadings and their usefulness in actuators, among other applications. These metamaterials offer a negative Poisson’s ratio at the macro level. However, usual auxetic metamaterials face challenges in (1) grading the effect, (2) coupling and combining auxetic metamaterials with non-auxetic materials due to boundary compatibility, (3) obtaining the same auxetic behavior in all directions in the transverse plane, and (4) adapting the regular geometry to the component design boundary and shape. The goal of this paper is to present a novel, recently patented tunable 3D metamaterial created to reproduce a wide spectrum of 3D auxetic and non-auxetic Poisson’s ratios and Young’s moduli. This wide range is obtained using the same basic unit cell geometry and boundary connections with neighboring cells, facilitating designs using functionally graded metamaterials as only the connectivity and position of the cell’s internal nodes are modified. Based on simple spatial triangularization, the metamaterial is easily scalable and better accommodates spatial curvatures or boundaries by changing the locations of nodes and lengths of bars. MDPI 2023-04-29 /pmc/articles/PMC10180246/ /pubmed/37176354 http://dx.doi.org/10.3390/ma16093473 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Ben-Yelun, Ismael
Gómez-Carano, Guillermo
San Millán, Francisco J.
Sanz, Miguel Ángel
Montáns, Francisco Javier
Saucedo-Mora, Luis
GAM: General Auxetic Metamaterial with Tunable 3D Auxetic Behavior Using the Same Unit Cell Boundary Connectivity
title GAM: General Auxetic Metamaterial with Tunable 3D Auxetic Behavior Using the Same Unit Cell Boundary Connectivity
title_full GAM: General Auxetic Metamaterial with Tunable 3D Auxetic Behavior Using the Same Unit Cell Boundary Connectivity
title_fullStr GAM: General Auxetic Metamaterial with Tunable 3D Auxetic Behavior Using the Same Unit Cell Boundary Connectivity
title_full_unstemmed GAM: General Auxetic Metamaterial with Tunable 3D Auxetic Behavior Using the Same Unit Cell Boundary Connectivity
title_short GAM: General Auxetic Metamaterial with Tunable 3D Auxetic Behavior Using the Same Unit Cell Boundary Connectivity
title_sort gam: general auxetic metamaterial with tunable 3d auxetic behavior using the same unit cell boundary connectivity
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10180246/
https://www.ncbi.nlm.nih.gov/pubmed/37176354
http://dx.doi.org/10.3390/ma16093473
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