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Study of an energy absorption element for leading edge slat or fixed leading edge through numerical simulations

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Delhalle, Hervé ULiège
Promotor(s) : Ponthot, Jean-Philippe ULiège
Date of defense : 27-Jun-2016 • Permalink : http://hdl.handle.net/2268.2/1456
Details
Title : Study of an energy absorption element for leading edge slat or fixed leading edge through numerical simulations
Translated title : [fr] Etude d'un élément d'absorption d'énergie sur les bords d'attaque fixes et mobiles de voilure par simulations numériques
Author : Delhalle, Hervé ULiège
Date of defense  : 27-Jun-2016
Advisor(s) : Ponthot, Jean-Philippe ULiège
Committee's member(s) : Duysinx, Pierre ULiège
Noels, Ludovic ULiège
Bruyneel, Michaël ULiège
Boman, Romain ULiège
Cerquaglia, Marco Lucio ULiège
Maillard, Etienne 
Language : English
Number of pages : 183
Keywords : [fr] Impact d'oiseau
[fr] Nid d'abeille aluminium
[fr] Simulations numériques
[fr] Plastique à renfort fibre de carbone
[en] Birdstrike
[en] Aluminium honeycomb
[en] Carbon fibre reinforced polymer
[en] Numerical simulations
Discipline(s) : Engineering, computing & technology > Mechanical engineering
Target public : Researchers
Professionals of domain
Student
Institution(s) : Université de Liège, Liège, Belgique
Degree: Master en ingénieur civil mécanicien, à finalité approfondie
Faculty: Master thesis of the Faculté des Sciences appliquées

Abstract

[en] The present final work project has been performed at Sonaca, a Belgian company which is producing aeronautical components. The objective was to study composite leading edge slat designs and more precisely the feasibility of using aluminium honeycomb cores as
energy absorption elements to handle the issues of composites parts submitted to bird impact. After a validation of the numerical simulation on a well known aluminium slat design, two composite designs have been studied. A hybrid design which combines an aluminium slat top skin and a composite rear structure has been found compliant with birdstrike requirements while cutting down the weight of the whole structure by 17.2% and the weight of the slat itself by 27.1% with respect to a reference aluminium slat design. Thereafter, the constitutive model used to represent the crushing behavior of aluminium honeycomb core has been identified using quasi-static crushing experiments before it has been validated under dynamic conditions using an birdstrike experiment carried out on a fixed leading edge. A full composite slat design associated to a fixed leading edge reinforced with aluminium honeycomb core has been proven compliant with birdstrike requirements while cutting down the weight of the whole structure by 17.5% and the weight of the slat itself by 41.7% with respect to a reference aluminium slat design. Key prerequisites for slat design integrating aluminium honeycomb cores such as the absence of localised stiff points and a sufficient stiffness of the part which support the core have been identified. The influence of the some design parameters has finally been assessed to give a first insight of the elements which should be taken into account during sizing of fixed leading edge reinforced with aluminium honeycomb cores.


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Author

  • Delhalle, Hervé ULiège Université de Liège > Master ing. civ. méc., à fin., fin. appr. (ex 2e master)

Promotor(s)

Committee's member(s)

  • Duysinx, Pierre ULiège Université de Liège - ULg > Département d'aérospatiale et mécanique > Ingénierie des véhicules terrestres
    ORBi View his publications on ORBi
  • Noels, Ludovic ULiège Université de Liège - ULg > Département d'aérospatiale et mécanique > Computational & Multiscale Mechanics of Materials (CM3)
    ORBi View his publications on ORBi
  • Bruyneel, Michaël ULiège Université de Liège - ULg > Département d'aérospatiale et mécanique > Modél. num. du comport. des struct. en matériaux composites
    ORBi View his publications on ORBi
  • Boman, Romain ULiège Université de Liège - ULg > Département d'aérospatiale et mécanique > Département d'aérospatiale et mécanique
    ORBi View his publications on ORBi
  • Cerquaglia, Marco Lucio ULiège Université de Liège - ULg > Département d'aérospatiale et mécanique > LTAS-Mécanique numérique non linéaire
    ORBi View his publications on ORBi
  • Maillard, Etienne SONACA SA, route Nationale, 5, 6041 GOSSELIES
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