Abstract
In this paper, a bird strike against a simple rectangular panel made of five different layups usually used in transparent parts of a ro- torcraft is investigated. A new bird model is introduced and its results for impact on a transparent panel are compared with those of a traditional bird model. To create the new bird model, a real Mallard duck is initially scanned by a computed tomography scan imaging device. Five dif- ferent transparent layups are studied: single-layer stretch acrylic, single-layer glass, two-wall cast acrylic, acrylic with a polyvinyl butyral (PVB) interlayer, and glass with a PVB interlayer. For each case, the optimum thickness that does not allow any penetration is presented. Finally, it was found that using a PVB interlayer can increase the strength of the transparency component to a great extent. For cases with a PVB interlayer, using glass is recommended over acrylic; however, in cases without the interlayer using acrylic is strongly recommended. DOI: 10.1061/(ASCE)AS.1943-5525.0000225. © 2014 American Society of Civil Engineers. Author keywords: Transparent component; Mallard bird model; Glass; Acrylic; Polyvinyl butyral (PVB) interlayer; Smoothed-particle hydrodynamics (SPH).
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