Fabrication and mechanical behaviors of quartz fiber composite honeycomb with extremely low permittivity. (1st September 2021)

• Record Type: Journal Article
• Authors: Liu, Zhengxian; Zhao, Weikai; Yu, Guocai; Wu, Linzhi
• Is Part Of: Composite structures. Volume 271(2021)
• Publication Date: 2021-09-01
• Subjects: Quartz fiber composite honeycomb -- Permittivity -- Compressive properties -- Shear properties -- Failure mechanism; Composite construction -- Periodicals; Composites -- Périodiques; 624.18
• DOI: 10.1016/j.compstruct.2021.114129
• Languages: English
• ISSNs: 0263-8223

Abstract

Highlights: Proposed quartz fiber composite honeycombs has extremely low permittivity. Curved wall enhanced the mechanical properties of quartz fiber composite honeycombs. Proposed analytical models and mechanism map have excellent reliability and accuracy. Abstract: The mechanical properties and electromagnetic parameter of quartz fiber composite honeycombs (QFCH) with different equivalent densities were studied. Equivalent permittivity of the QFCH was inversed according to the transmission efficiency, which was tested by the Naval Research Laboratory Arch (NRL-arc) method. The strengths of QFCH under out-of-plane compressive and in-plane shear loading were predicted and measured. The failure mechanism map was established to predict the main failure modes of QFCH. Meanwhile, the numerical simulation was used to verify the accuracy of failure mechanism map. The QFCH designed in this study has extremely low permittivity and excellent mechanical properties, which has immense potential to be used as a 3-D metamaterial mechanical framework and more competitive in the vigorous development of new generation radomes.