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Blast-Induced Compression of a Thin-Walled Aluminum Honeycomb Structure—Experiment and Modeling

Abstract : The presented discussion concerns the behavior of a thin-walled hexagonal aluminum honeycomb structure subjected to blast loading. The shock wave affecting the structure is generated by detonation of the C4 charge in an explosive-driven shock tube (EDST). The EDST set-up is an instrumented device that makes it possible to study blast effects in more stable and repeatable conditions than those obtained in a free-air detonation. The formation of folds characteristic of a honeycomb deformation in the axial compression distributes the initial loading over a time period, which is considered as an efficient method of energy dissipation. The test configuration is modeled in the Ls-Dyna explicit code, which enables analysis of the mechanisms of energy absorption that accompanies structural deformation under a blast loading. The conclusions reached in the performed experimental and numerical investigation can be applied to the modeling and optimization of cellular structures used to mitigate blast loadings.
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Submitted on : Thursday, September 16, 2021 - 12:42:50 PM
Last modification on : Friday, August 5, 2022 - 2:54:00 PM

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Magda Stanczak, Teresa Fras, Ludovic Blanc, Piotr Pawlowski, Alexis Rusinek. Blast-Induced Compression of a Thin-Walled Aluminum Honeycomb Structure—Experiment and Modeling. Metals, MDPI, 2019, 9 (12), pp.1350. ⟨10.3390/met9121350⟩. ⟨hal-03346432⟩



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