A numerical and experimental approach to blast protection with fluids, effect of impulse spreading

authored by: Tatiana Rigoulet, Ludovic Blanc, Federica Daghia, Peter Wriggers
Abstract: In the face of rapidly evolving challenges, new protection techniques against blast waves generated by high explosive detonations must be identified. The protection of vehicle floors is particularly relevant, especially against improvised explosive devices (IED), as these are challenging to detect. In this paper, investigations on fluid-filled sacrificial claddings are presented. Classical sacrificial claddings aim at limiting the deflection of the target by dissipating the blast wave energy through the core plastic or brittle deformation. On the contrary, fluid-filled sacrificial claddings are systems which aim at limiting the deflection of the target by extracting energy from the system and modifying the load distribution on the target. A new experimental set-up, designed for this investigation, is presented. Based on pressure signals, high speed-imaging and numerical simulations on LS-DYNA, it is shown that the ability to extract energy from the system is directly linked to the freedom of displacement of the fluid. It is also shown that at the same time, higher fluid displacement and well-designed boundary conditions lead to higher impulse spreading on the target.
Organisation(s): Institute of Continuum Mechanics
External Organisation(s): Université Paris-Saclay
Institut franco-allemand de recherches de Saint-Louis (ISL)
Type: Article
Journal: International Journal of Impact Engineering
Volume: 194
ISSN: 0734-743X
Publication date: 12.2024
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: Civil and Structural Engineering, Automotive Engineering, Aerospace Engineering, Safety, Risk, Reliability and Quality, Ocean Engineering, Mechanics of Materials, Mechanical Engineering
Electronic version(s): https://doi.org/10.1016/j.ijimpeng.2024.105094 (Access: Closed)
: Details in the research portal "Research@Leibniz University"

BibTeX

@article{9b68ca5bd8e9418880ac77009258e1bb,
title = "A numerical and experimental approach to blast protection with fluids, effect of impulse spreading",
abstract = "In the face of rapidly evolving challenges, new protection techniques against blast waves generated by high explosive detonations must be identified. The protection of vehicle floors is particularly relevant, especially against improvised explosive devices (IED), as these are challenging to detect. In this paper, investigations on fluid-filled sacrificial claddings are presented. Classical sacrificial claddings aim at limiting the deflection of the target by dissipating the blast wave energy through the core plastic or brittle deformation. On the contrary, fluid-filled sacrificial claddings are systems which aim at limiting the deflection of the target by extracting energy from the system and modifying the load distribution on the target. A new experimental set-up, designed for this investigation, is presented. Based on pressure signals, high speed-imaging and numerical simulations on LS-DYNA, it is shown that the ability to extract energy from the system is directly linked to the freedom of displacement of the fluid. It is also shown that at the same time, higher fluid displacement and well-designed boundary conditions lead to higher impulse spreading on the target.",
keywords = "Blast protection, Cladding, Ejection, Fluids",
author = "Tatiana Rigoulet and Ludovic Blanc and Federica Daghia and Peter Wriggers",
note = "Publisher Copyright: {\textcopyright} 2024 Elsevier Ltd",
year = "2024",
month = dec,
doi = "10.1016/j.ijimpeng.2024.105094",
language = "English",
volume = "194",
journal = "International Journal of Impact Engineering",
issn = "0734-743X",
publisher = "Elsevier Ltd.",
}