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Habilitation à diriger des recherches

Ruine des structures aéronautiques rivetées aux chargements de type explosion ou pression dynamique

Abstract : The context of the presented research concerns the vulnerability of airframes faced to blast explosions. Resuming the ruin scenario of a fuselage during a bomb attack, three research areas contribute to the issue set down in the report. The first one deals with the dynamic loading resulting from the explosion of a bomb within the fuselage. The second and third ones concerns the assemblies ; the characterisation and modelling of their mechanical behaviour and failure are particularly studied and especially under dynamic loadings. Concerning the structural load (dynamic pressure), an applied research aims at validating coupled fluid/structure interaction methods to measure the blasting shock wave, to develop uncoupled fluid/structure interaction methods to enable the analysis of complete and complex structures, and to develop a numerical method for the coupling of a structure immersed in a fluid. In the field of the assemblies characterisation for structural calculation applications, the experimental and numerical research consists in developing new experimental methods based on normalized tests that makes it possible to analyse the behaviour and failure of fasteners in pure and combined tensile/shear modes from quasi-static to dynamic displacement rates loads, and finally an alternative numerical method (virtual testing) is also developed to study an assembly from the riveting process, up to the dynamic strength. Finally, a more fundamental research aims at improving the assemblies modelling technique to be used in structural computation. For the fastener, a model with a non-linear behaviour implemented is developed based on a hybrid formulation. For the perforated metal sheet, a model and a criterion for failure are presented, a multi-scale approach and a hybrid finite element are developed.
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Habilitation à diriger des recherches
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https://tel.archives-ouvertes.fr/tel-00568194
Contributor : Bertrand Langrand <>
Submitted on : Tuesday, March 29, 2011 - 9:39:40 AM
Last modification on : Friday, November 13, 2020 - 8:44:11 AM
Long-term archiving on: : Thursday, June 30, 2011 - 2:33:45 AM

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  • HAL Id : tel-00568194, version 2

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Bertrand Langrand. Ruine des structures aéronautiques rivetées aux chargements de type explosion ou pression dynamique. Matériaux. Université de Valenciennes et du Hainaut-Cambresis, 2010. ⟨tel-00568194v2⟩

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