Ultrasonic determination of the elastic constants of epoxy-natural fiber composites

This paper shows the applications ultrasonic through–transmission technique to determine the elastic constants of two polymer-natural fiber composite materials with potential industrial application and economic and environmental advantages. The transversely isotropic coconut-epoxy and fique-epoxy samples were analyzed using an experimental setup which allows the sample to be rotated with respect to transducers faces and measures the time-of-flight at different angles of incidence. Then, the elastic properties of the material were obtained by fitting the experimental data to the Christoffel equation. Results show a good agreement between the measured elastic constants and the values predicted by an analytical model. The velocities as a function of the incidence angle are reported and the effect of the natural fiber on the stiffness of the composite is discussed

• Autores: Franco Guzmán, Ediguer Enrique; Meza Valencia, Carlos Alberto; Pazos Ospina, Jhon Fernando; Ealo Cuello, Joao Luis; Casanova Garcia, Gonzalo Fernando
• Tipo de recurso: Article of journal
• Fecha de publicación: 2015
• Institución: Universidad Autónoma de Occidente
• Repositorio: RED: Repositorio Educativo Digital UAO
• Idioma: eng
• OAI Identifier: oai:red.uao.edu.co:10614/11996
• Acceso en línea: http://red.uao.edu.co//handle/10614/11996
• Palabra clave: Ultrasonic through-transmission; Composite materials; Vegetable fibers; Elastic constants; Christoffel's equation
• Rights: openAccess
• License: Derechos Reservados - Universidad Autónoma de Occidente