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Investigating the effect of TPU and SG interlayer on windshield resistance against bird strike

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Abstract

Bird Strike is one of the major threats for airplane structure. This study assesses the bird impact on the windshield of an airplane both experimentally and numerically. The windshield was made of glass with Sentry glass (SG) and Thermoplastic polyurethane (TPU) interlayers. The windshield thickness, impact speed of the bird, and impact angle were considered as 33.1 mm, 155 m/s, and 45\(^\circ\), respectively according to the standards. LS Dyna software was utilized to simulate the bird impact on the windshield and the bird was considered as a flat-base cylinder. Experimental results indicated that a cavity created in the windshield panel with pure SG interlayer against the bird strike. For the windshield with hybrid SG-TPU interlayer, despite the better resistance compared to the windshield with pure SG case, the back glass layer was broken and detached at the collision side. Based on the simulation results, the panel with pure TPU interlayer led to the best performance of the windshield. Moreover, the deflection of the panel center was lower when thinner glass layers were used at impact side. The influence of the strike angle was also simulated which introduced the normal impact angle as the most critical case.

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Authors and Affiliations

  1. Department of Mechanical Engineering, Bu-Ali Sina University, P.O.B. 651754161, Hamedan, Iran

    Farshid Kholoosi & Ali Alavi Nia

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  1. Farshid Kholoosi
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  2. Ali Alavi Nia
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Correspondence to Ali Alavi Nia.

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Kholoosi, F., Alavi Nia, A. Investigating the effect of TPU and SG interlayer on windshield resistance against bird strike. J Braz. Soc. Mech. Sci. Eng. 45, 424 (2023). https://doi.org/10.1007/s40430-023-04333-4

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  • DOI: https://doi.org/10.1007/s40430-023-04333-4

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