Evaluation of the Orthotropic Behavior in an Auxetic Structure Based on a Novel Design Parameter of a Square Cell with Re-Entrant Struts

Primer Autor
Pincheira, Gonzalo
Co-autores
Valle, Rodrigo
Tuninetti, Victor
Garrido, Cesar
Trevino, Cecilia
Morales, Jorge
Título
Evaluation of the Orthotropic Behavior in an Auxetic Structure Based on a Novel Design Parameter of a Square Cell with Re-Entrant Struts
Editorial
MDPI
Revista
POLYMERS
Lenguaje
en
Resumen
In this research, a three-dimensional auxetic configuration based on a known re-entrant cell is proposed. The 3D auxetic cell is configured from a new design parameter that produces an internal rotation angle to its re-entrant elements to study elastic properties in its three orthogonal directions. Through a topological analysis using Timoshenko beam theory, the bending of its re-entrant struts is modeled as a function of the new design parameter to manipulate Poisson's ratio and Young's modulus. Experimental samples were fabricated using a fused filament fabrication system using ABS and subsequently tested under quasi-static compression and bending tests. Additionally, an orthotropy factor is applied that allows for measuring the deviation between the mechanical properties of each structure. The experimental results validate the theoretical design and show that this new unit cell can transmit an orthotropic mechanical behavior to the macrostructure. In addition, the proposed structure can provide a different bending stiffness behavior in up to three working directions, which allows the application under different conditions of external forces, such as a prosthetic ankle.
Tipo de Recurso
artículo original
doi
10.3390/polym14204325
Formato Recurso
PDF
Palabras Claves
additive manufacturing
auxetic structures
cellular structures
mechanical characterization
MECHANICAL-BEHAVIOR
ELASTIC PROPERTIES
FRACTURE-TOUGHNESS
LATTICE STRUCTURES
FOAM STRUCTURES
POISSONS RATIO
SYSTEM
Ubicación del archivo
http://dx.doi.org/10.3390/polym14204325
Categoría OCDE
Ciencia de los polímeros
Materias
fabricación aditiva
estructuras auxéticas
estructuras celulares
caracterización mecánica
COMPORTAMIENTO-MECÁNICO
PROPIEDADES ELÁSTICAS
RESISTENCIA A LA FRACTURA
ESTRUCTURAS DE CELOSÍA
ESTRUCTURAS DE ESPUMA
RELACIÓN DE POISSONS
SISTEMA
Disciplinas de la OCDE
Ingeniería de los Materiales
Ingeniería Mecánica
Ingeniería Médica
Título de la cita (Recomendado-único)
Evaluation of the Orthotropic Behavior in an Auxetic Structure Based on a Novel Design Parameter of a Square Cell with Re-Entrant Struts
Identificador del recurso (Mandatado-único)
artículo original
Versión del recurso (Recomendado-único)
version publicada
License
CC BY 4.0
Condición de la licencia (Recomendado-repetible)
CC BY 4.0
Derechos de acceso
acceso abierto
Access Rights
acceso abierto
Id de Web of Science
WOS:000875232800001
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