An explicit numerical modeling of soft body impact damage in metallic airplane structures

Smojver, Ivica and Ivančević, Darko and Mihaljević, Dario (2010) An explicit numerical modeling of soft body impact damage in metallic airplane structures. = An explicit numerical modeling of soft body impact damage in metallic airplane structures. CMES - Computer Modeling in Engineering and Sciences, 70 (2). pp. 191-215. ISSN 1526-1492. Vrsta rada: ["eprint_fieldopt_article_type_article" not defined]. . Točan broj autora: 3.

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Abstract

This paper tackles the problem of numerical prediction of bird strike induced damage in real aeronautical structures using highly detailed finite element models and modern numerical approaches. Due to the complexity of today's aeronautical structures, numerical damage prediction methods have to be able to take into account various failure and degradation models of different materials. The work presented in this paper is focused on damage modeling in metallic items of aeronautical structures. Abaqus/Explicit has been employed to perform geometrical and material nonlinear transient dynamic analyses. The problem of soft body impacts has been tackled by applying a hybrid Eulerian Lagrangian technique, thereby avoiding numerical difficulties associated with extensive mesh distortion. Eulerian modeling of the bird impactor resulted in a more realistic behavior of bird material during impact. The main focus of the work presented in this paper is the application of damage prediction procedure in damage assessment of bird impact on a typical large airliner slat structure and comparison with damage observed during exploitation of a real slat structure. Due to the high cost of gas-gun testing of aircraft components, experimental testing on the real flap structure could not have been performed. Validation of the hybrid formulation in solving bird strike problems has been achieved by comparison with available references. Copyright © 2010 Tech Science Press.

Item Type:	Article (["eprint_fieldopt_article_type_article" not defined])
Keywords (Croatian):	Aeronautical structures; Bird strike; Coupled eulerian lagrangian formulation; Damage; Strain rate effects; Structural impact; Aerodynamics; Finite element method; Forecasting; Lagrange multipliers; Numerical methods; Strain rate; Damage detection
Subjects:	TECHNICAL SCIENCE > Mechanical Engineering TECHNICAL SCIENCE > Aviation, rocket and space technology
Divisions:	1300 Department of Aeronautical Engineering > 1310 Chair of Aerodynamics
Indexed in Web of Science:	Yes
Indexed in Current Contents:	Yes
Citations JCR:	1 (29.6.2015.)
Citations SCOPUS:	1 (29.6.2015.)
Date Deposited:	15 Apr 2015 12:26
Last Modified:	29 Jun 2015 09:32
URI:	http://repozitorij.fsb.hr/id/eprint/3627

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