Grimaldi, Arcangelo (2010) SPH High Velocity Impact Analysis - A Birdstrike Windshield Application. [Tesi di dottorato] (Inedito)

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Tipologia del documento: Tesi di dottorato
Lingua: English
Titolo: SPH High Velocity Impact Analysis - A Birdstrike Windshield Application
Autori:
AutoreEmail
Grimaldi, Arcangeloarcangelo.grimaldi@unina.it
Data: 30 Novembre 2010
Numero di pagine: 93
Istituzione: Università degli Studi di Napoli Federico II
Dipartimento: Ingegneria aerospaziale
Scuola di dottorato: Ingegneria industriale
Dottorato: Ingegneria aerospaziale, navale e della qualità
Ciclo di dottorato: 23
Coordinatore del Corso di dottorato:
nomeemail
Moccia, Antonioantonio.moccia@unina.it
Tutor:
nomeemail
Marulo, Francescofrancesco.marulo@unina.it
Data: 30 Novembre 2010
Numero di pagine: 93
Parole chiave: birdstrike; SPH; windshield; LS-Dyna
Settori scientifico-disciplinari del MIUR: Area 09 - Ingegneria industriale e dell'informazione > ING-IND/04 - Costruzioni e strutture aerospaziali
Depositato il: 02 Dic 2010 21:58
Ultima modifica: 30 Apr 2014 19:45
URI: http://www.fedoa.unina.it/id/eprint/8221
DOI: 10.6092/UNINA/FEDOA/8221

Abstract

This dissertation is the result of a research focused on the study, with the help of finite element analysis , of an aircraft windshield-surround structure with an innovative configuration, that satisfies the bird-strike requirement according to the EASA Certification Specifications 25.631 on the ”Bird-strike Damage” [CS25.631 (2003)]. The first step was the numerical analysis of a simplified, but realistic, square flat windshield model subjected to impact by a 1.8 kg bird model at 155m/s with an impact angle of 90◦. The FE-SPH coupled approach was used to simulate the birdstrike by using the explicit finite element solver code LS-Dyna. The second step was the execution of a parametric analysis on the square model to estimate the influence of the target geometry, the impact angle, and the plate curvature on the impact response of the windshield structure. The goal of these numerical simulations was the evaluation of the windshield capability to absorb the impact energy, involving during a birdstrike event, in a safe and efficient way without any damage. Finally it was developed a numerical simulation of birdstrike event on a full-scale aircraft windshield-surround model. This FE numerical analysis showed the capability of the real innovative windshield to withstand to the impact force transferred by the bird during the impact and permitted the definition of some guidelines to execute a certification test simulation and to give an impact test article proposal, needed for a design of an airplane windshield structure able to resist to a birdstrike event in according with the conditions stated in the CS 25 standard requirements.

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