Article (Scientific journals)
Design and Characterization of Asymmetric Cell Structure of Auxetic Material for Predictable Directional Mechanical Response.
Valle, Rodrigo; Pincheira, Gonzalo; Tuninetti, Víctor et al.
2022In Materials, 15 (5), p. 1841
Peer reviewed
 

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Keywords :
additive manufacturing; auxetic structures; cellular structures; mechanical characterization; Asymmetric-cells; Auxetic materials; Auxetics; Cell structure; Cellular structure; Mechanical characterizations; Mechanical response; Planar configurations; Structure-based; Materials Science (all); Condensed Matter Physics; General Materials Science
Abstract :
[en] A three-dimensional auxetic structure based on a known planar configuration including a design parameter producing asymmetry is proposed in this study. The auxetic cell is designed by topology analysis using classical Timoshenko beam theory in order to obtain the required orthotropic elastic properties. Samples of the structure are fabricated using the ABSplus fused filament technique and subsequently tested under quasi-static compression to statistically determine the Poisson's ratio and Young's modulus. The experimental results show good agreement with the topological analysis and reveal that the proposed structure can adequately provide different elastic properties in its three orthogonal directions. In addition, three point bending tests were carried out to determine the mechanical behavior of this cellular structure. The results show that this auxetic cell influences the macrostructure to exhibit different stiffness behavior in three working directions.
Disciplines :
Materials science & engineering
Author, co-author :
Valle, Rodrigo ;  Faculty of Engineering, University of Talca, Talca 3340000, Chile
Pincheira, Gonzalo ;  Department of Industrial Technologies, Faculty of Engineering, University of Talca, Talca 3340000, Chile
Tuninetti, Víctor ;  Department of Mechanical Engineering, Universidad de La Frontera, Francisco Salazar 01145, Temuco 4780000, Chile
Fernandez Sanchez, Eduardo Felipe  ;  Université de Liège - ULiège > Département d'aérospatiale et mécanique > LTAS-Mécanique numérique non linéaire
Uribe-Lam, Esmeralda ;  Tecnológico de Monterrey, Escuela de Ingeniería y Ciencias, Querétaro 76130, Mexico
Language :
English
Title :
Design and Characterization of Asymmetric Cell Structure of Auxetic Material for Predictable Directional Mechanical Response.
Publication date :
01 March 2022
Journal title :
Materials
eISSN :
1996-1944
Publisher :
MDPI, Switzerland
Volume :
15
Issue :
5
Pages :
1841
Peer reviewed :
Peer reviewed
Funding text :
Funding: The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: This work was funded by the National Agency for Research and Development (ANID) Beca de Doctorado Nacional 21191100 and Fondecyt project 11170002. The authors also acknowledge partial funding by the Dirección de Investigación (Univesidad de La Frontera).
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since 04 November 2022

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