Repositorio UFRO · Omeka S

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