Issue |
Mechanics & Industry
Volume 24, 2023
High fidelity models for control and optimization
|
|
---|---|---|
Article Number | 27 | |
Number of page(s) | 10 | |
DOI | https://doi.org/10.1051/meca/2023021 | |
Published online | 14 August 2023 |
Regular Article
Numerical modeling of brittle mineral foam in a sacrificial cladding under blast loading
1
Vrije Universiteit Brussel (VUB), Mechanics of Materials and Construction Department, Pleinlaan 2, 1050 Brussels, Belgium
2
Royal Military Academy, Civil and Materials Engineering Department, 30 Avenue de la Renaissance, 1000 Brussels, Belgium
* e-mail: aldjabaraminou@hotmail.com
Received:
28
February
2023
Accepted:
26
June
2023
Cellular materials, such as aluminum foams, have proven to be excellent energy absorbents. They can be used as crushable core in sacrificial cladding (SC) for blast load mitigation. In this study, the blast absorption capacity of a brittle mineral foam-based SC is investigated through finite element modeling using the LS-DYNA software. The experimental set-up used consists of a rigid steel frame with a square cavity of 300 mm x 300 mm in the center The structure to be protected is simulated by a thin aluminum plate clamped into the rigid steel frame. The blast load is generated by 20 g of C4 high explosive set at a distance of 250 mm from the center of the plate. The blast absorption capacity of the considered SC is evaluated by comparing the maximum out-of-plane displacement of the center of the plate with and without the protective brittle mineral foam. The presence of the brittle mineral foam reduces the maximum out-of-plane displacement of the center of the plate at least by a factor of two. The brittle mineral foam is modeled both in solid elements and smoothed-particle hydrodynamics (SPH) by using Fu Chang's constitutive material law based exclusively on the results of quasi-static compression tests of the foam and a phenomenological relationship between stress, strain and strain rate. The SPH model predicts the maximum out-of-plane displacement of the center of the aluminum plate with an average relative error of 5% with respect to the experimental values.
Key words: Blast loading / brittle mineral foam / sacrificial cladding / numerical modeling
© A. Aminou et al., Published by EDP Sciences 2023
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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