Effect of Skin and Core Thickness of Glass Fiber - 3D Honeycomb Sandwich Panel under Bird Impact
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Abstract
To minimise bird strike damage on radomes in high-risk areas, the radome material must be both bird-impact resistant and electromagnetically transparent. Glass fiber reinforced polymer (GFRP) with aramid honeycomb core offers a good balance of these properties. This study aims to determine the critical bird impact velocity that causes penetration of the radome, protecting the antenna and electronics behind it. An experimental and numerical simulation, where a 39mm thick (1.5mm skin and 36mm core) A-type GFRP-aramid honeycomb panel of dimension 1m×1m under impact up to 146m/s. The numerical simulation is extended to analyse these sandwich panels with varying core thicknesses of 24mm and 36mm and skin thicknesses of 1mm, 1.5mm and 2mm. The outcome of the study shows that the variation of the core thickness affects the penetration velocity more than the variation of the skin thickness of sandwich panel.
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