Frequency-dependent orthotropic damping properties of Nomex honeycomb composites

Zhou, Yong, Liu, Anna, Xu, Yongzheng, Guo, Yunli, Yi, XiaoSu and Jia, Yuxi (2020) Frequency-dependent orthotropic damping properties of Nomex honeycomb composites. Thin-Walled Structures, 160 . p. 107372. ISSN 02638231

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In this paper, the orthotropic damping behavior of Nomex honeycomb composites and its causes are investigated. The needed specimen sizes for the measurement of the frequency-dependent transverse shear moduli (TSM) and fundamental damping coefficients of the honeycomb cores were analyzed at first. Then, the effects of cell side length and beam orientation on the orthotropic damping properties were explored. The results reveal that relatively high TSM (GLT) and damping values (ηWT) can be obtained by decreasing the cell side length without adding any additional weight. Damping mechanism analysis indicates that the difference in damping contribution of the interfacial phase to honeycomb core in different directions leads to the orthotropic damping behavior of honeycomb core. This study is helpful to guide the TSM measurement and structure design of honeycomb composites.

Item Type: Article
Keywords: Honeycomb composite; Experimental/numerical method; Orthotropic damping property; Transverse shear modulus; Cell side length
Schools/Departments: University of Nottingham Ningbo China > Faculty of Science and Engineering > Department of Mechanical, Materials and Manufacturing Engineering
Identification Number:
Depositing User: Wu, Cocoa
Date Deposited: 31 Dec 2020 05:36
Last Modified: 31 Dec 2020 05:36

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