Inscrição na biblioteca: Guest
Portal Digital Begell Biblioteca digital da Begell eBooks Diários Referências e Anais Coleções de pesquisa
Composites: Mechanics, Computations, Applications: An International Journal
ESCI SJR: 0.193 SNIP: 0.497 CiteScore™: 0.39

ISSN Imprimir: 2152-2057
ISSN On-line: 2152-2073

Composites: Mechanics, Computations, Applications: An International Journal

DOI: 10.1615/CompMechComputApplIntJ.v5.i3.50
pages 245-258

FINITE-ELEMENT ASSESSMENT OF DAMAGE TO AN AIRCRAFT WINDSHIELD INCURRED BY HIGH-SPEED MULTIPLE BIRD STRIKES

Uzair Ahmed Dar
School of Mechanical Engineering, Northwestern Polytechnical University Xi'an, Shaanxi, China; Faculty of Mechanical Engineering GIK Institute of Engineering Sciences and Technology, Pakistan
Weihong Zhang
Laboratory of Engineering Simualtion and Aerospace Computing (ESAC), Northwestern Polytechnical University, P.O.Box 552, 710072, Xi'an, Shaanxi, China

RESUMO

In this work, a numerical model has been developed to predict the damage and failure of an aircraft windshield incurred by high-speed repeated bird impacts. Finite element (FE) simulations were performed by implementing the numerical model in explicit FE solver ANSYS AUTODYN. A rate-dependent elastoplastic material model with the maximum principal stress failure criterion and Mie−Gruneisen equation of state (EOS) model with the tensile failure criterion were adopted to model the damage of windshield and bird, respectively. The model successfully predicts the damage initiation and complete failure of windshield at different impact velocities. The maximum normal displacement and equivalent stress at different positions on the windshield were determined and compared for a single and multiple impacts. On the basis of numerical results, the limiting impact velocity, critical number of impacts, and the weakest portion on the windshield were also determined. The results show that at higher impact velocity, multiple impacts prove fatal to the windshield structure. The windshield that withstands a single bird impact is vulnerable to fail under successive impacts.