Blast disruption using 3D grids/perforated plates for vehicle protection

Schunck, Thérèse; Eckenfels, D.; Sinniger, Laurent

doi:10.1016/j.dt.2022.10.005

Cited by 4 publications

(3 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…When discussing blast wave protection, the greatest challenge is raised by the already in-service vehicles, where protection can be achieved only by considering the use of additional mitigation systems. Placing perforated plates beneath the military vehicle’s belly is a costless and possibly effective approach [ 31 , 32 , 33 ] to retrofit an already in-service design to withstand higher blast wave loads.…”

Section: Discussionmentioning

confidence: 99%

Experimental and Numerical Study on Perforated Plate Mitigation Capacity to Near-Field Blasts

Puică¹,

Trană

Pupăză

et al. 2023

Materials

View full text Add to dashboard Cite

Based on the analysis of existing collective shockwave protection methods worldwide, this paper addresses the mitigation of shock waves by means of passive methods, namely the use of perforated plates. Employing specialized software for numerical analysis, such as ANSYS-AUTODYN 2022R1®, the interaction of shock waves with a protection structure has been studied. By using this cost-free approach, several configurations with different opening ratios were investigated, pointing out the peculiarities of the real phenomenon. The FEM-based numerical model was calibrated by employing live explosive tests. The experimental assessments were performed for two configurations, with and without a perforated plate. The numerical results were expressed in terms of force acting on an armor plate placed behind a perforated plate at a relevant distance for ballistic protection in engineering applications. By investigating the force/impulse acting on a witness plate instead of the pressure measured at a single point, a realistic scenario can be considered. For the total impulse attenuation factor, the numerical results suggest a power law dependence, with the opening ratio as a variable.

show abstract

Section: Discussionmentioning

confidence: 99%

Experimental and Numerical Study on Perforated Plate Mitigation Capacity to Near-Field Blasts

Puică¹,

Trană

Pupăză

et al. 2023

Materials

View full text Add to dashboard Cite

show abstract

“…The general concept of blast protection is to insert a structure between the explosive charge and the target [4]. This structure is designed to either mitigate explosive detonation [5]- [7], disrupt blast wave propagation [4], [8]- [10], or provide passive target protection [11]- [13]. The detonation of the explosive can for example be mitigated by using bulk water [5], mist [6] and aqueous foam [7].…”

Section: Introductionmentioning

confidence: 99%

“…Multi-layered materials on the other hand rely on the impedance mismatch between each layer to disperse the blast waves across the structure [8]. The incoming blast wave can be deflected or disturbed by using specific geometries, such as V-shaped plates [9], arrays of cylindrical pipes [10] or 3D grid plates [4]. The sacrificial cladding is a passive protective solution that allows the blast wave energy to be dissipated and enhances the protection of the target against blast load [14].…”

Section: Introductionmentioning

confidence: 99%

Blast Absorption Capacity of Brittle Mineral Foam: an Experimental Evaluation

Aminou,

Ben-Rhouma,

Belkassem

et al. 2023

hya

View full text Add to dashboard Cite

Cellular materials, such as aluminum foam, have proven to be effective energy absorbents. They can be used as the crushable core for blast mitigation sacrificial cladding. In this paper insights into the blast response of a brittle mineral foam-based sacrificial cladding are presented. The experimental set-up used consists of a rigid steel frame (1000 mm × 1000 mm × 15 mm) with a square cavity of 300 mm x 300 mm in the center. An aluminum plate, representing the structure, with a total surface of 400 mm × 400 mm and a thickness of 2 mm is clamped into the steel frame. Two synchronized high-speed cameras in a stereoscopic configuration are used to capture the dynamic response of the aluminum plate at a frame rate of 20000 frames per second. The transient deformation fields are computed using a three-dimensional digital image correlation technique. The blast load is obtained by detonating 20 g of C4 placed at a distance of 250 mm from the center of the tested aluminum plate. The absorption capacity of the brittle mineral foam is assessed by comparing the out-of-plane displacement, the velocity, the acceleration and the major principal strain of the thin aluminum plate with and without the protective mineral foam. Two foam configurations with different thicknesses are considered: 60 mm and 120 mm. It is shown that adding the brittle mineral foam reduces the out-of-plane displacement together with the displacement velocity and acceleration of the aluminum plate at least by a factor of two. Post-mortem analysis of the foams shows that mitigation of the blast load in the present set-up and under the considered loading is partially obtained by crushing of the cell walls but mostly though the growth of cracks in the specimen.

show abstract

Investigating the influence of plate geometry and detonation variations on structural responses under explosion loading: A nonlinear finite-element analysis with sensitivity analysis

Amanta,

Muttaqie,

Prabowo

et al. 2024

Curved and Layered Structures

View full text Add to dashboard Cite

This study presents the results of a numerical analysis of the response of Domex 700 and Dormex 1100 steel plates with varying geometries, combined with several different parameters such as a thickness of up to 6 mm and a trinitrotoluene (TNT) mass. Using ABAQUS software, finite-element analysis was run to examine the structural response ability of the steel plates to explosions. In terms of deformation and energy dissipation, the results showed a large differentiation. A sensitivity analysis was used to examine each simulation result in terms of the structural response performance to explosions and identify the variables that had the greatest impact on variations in the thickness, material, geometry, and TNT mass. The best numerical simulation results were found using the multi-attribute decision-making (MADM) approach. Annotations are utilized to assist in identifying the various modifications made during testing. Annotations LXXI to LVIII achieved the lowest value of 6.176 × 10−09, signifying the best results according to calculations made using the MADM approach. This is evidenced by the structural events, demonstrating that the deformation, von Mises stress, and energy dissipation in the circular plate structure were not significantly impacted by the explosion. The variables that most significantly affect variations in deformation, von Mises stress, and dissipated energy – variables that significantly impact the structural response to explosions – are identified through the sensitivity analysis approach. The results of this research can be used to optimize the structural response performance of circular plates.

show abstract

Blast disruption using 3D grids/perforated plates for vehicle protection

Cited by 4 publications

References 10 publications

Experimental and Numerical Study on Perforated Plate Mitigation Capacity to Near-Field Blasts

Experimental and Numerical Study on Perforated Plate Mitigation Capacity to Near-Field Blasts

Blast Absorption Capacity of Brittle Mineral Foam: an Experimental Evaluation

Investigating the influence of plate geometry and detonation variations on structural responses under explosion loading: A nonlinear finite-element analysis with sensitivity analysis

Contact Info

Product

Resources

About