Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Flow resistivity, characteristic impedance and complex wave number assessment of coconut fiber with thin thickness samples.
Submission Author:
Nelson Legat Filho , PR
Co-Authors:
Key Fonseca de Lima, Nilson Barbieri, Fernando Jun Hattori Terashima, Vinicius Antonio Grossl, Nelson Legat Filho
Presenter: Nelson Legat Filho
doi://10.26678/ABCM.COBEM2017.COB17-2063
Abstract
In this article, characteristic impedance and complex wave number for the coconut fibre have been evaluated for samples with 5 and 10 mm thicknesses at low frequencies. These properties were obtained applying the classical empirical equations of Delany and Bazley (1970). In addition, this equation needs the flow resistivity assessment of the fibre samples, which is followed by the standard ASTM C522-03 (2010). As a result, the flow resistivity values are different for two thicknesses measured, but the impedance and complex wave number obtained are similar.
Keywords
flow resistivity, characteristic impedance, complex wave number, coconut, fiber
