Corn Husk Fiber-Polyester Composites as Sound Absorber: Nonacoustical and Acoustical PropertiesReportar como inadecuado




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Advances in Acoustics and Vibration - Volume 2017 2017, Article ID 4319389, 7 pages - https:-doi.org-10.1155-2017-4319389

Research Article

Department of Mechanical Engineering, Faculty of Engineering, Mataram University, Nusa Tenggara Barat, Indonesia

Department of Mechanical Engineering, Faculty of Engineering, Brawijaya University, East Java, Indonesia

Correspondence should be addressed to Nasmi Herlina Sari

Received 13 December 2016; Accepted 29 January 2017; Published 19 February 2017

Academic Editor: Marc Thomas

Copyright © 2017 Nasmi Herlina Sari et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This study investigates the acoustical and nonacoustical properties of composites using corn husk fiber CHF and unsaturated polyester as the sound-absorbing materials. The influence of the volume fraction of CHF on acoustic performance was experimentally investigated. In addition, the nonacoustical properties, such as air-flow resistivity, porosity, and mechanical properties of composites have been analyzed. The results show that the sound absorptions at low frequencies are determined by the number of lumens in fiber, particularly the absorption coefficient, which increases the amount of fiber. For high-frequency sound, the absorption coefficient is determined by the arrangement of fibers in the composite. An absorption coefficient is close to zero when the fibers are arranged in a conventional pattern; however, when they are arranged in a random pattern, a high absorption coefficient can be obtained. The bond interface between the fiber and resin enhances its mechanical properties, which increases the longevity of the composite panel.





Autor: Nasmi Herlina Sari, I. N. G Wardana, Yudy Surya Irawan, and Eko Siswanto

Fuente: https://www.hindawi.com/



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