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

Stanczak, Magda; Frąś, Teresa; Blanc, Ludovic; Pawłowski, Piotr; Rusinek, Alexis

doi:10.3390/met9121350

Cited by 22 publications

(17 citation statements)

References 32 publications

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“…They demonstrate a high range of deformation under various loading conditions, where the damage mechanism is usually caused by buckling, bending, and shearing [ 26 ]. These properties are particularly important for energy absorption and crashworthiness applications, where a wide range of material deformations without a damage mechanism such as cracking suddenly occurring are required [ 27 , 28 , 29 , 30 , 31 , 32 ].…”

Section: Introductionmentioning

confidence: 99%

Deformation Process of 3D Printed Structures Made from Flexible Material with Different Values of Relative Density

et al. 2020

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The main aim of this article is the analysis of the deformation process of regular cell structures under quasi-static load conditions. The methodology used in the presented investigations included a manufacturability study, strength tests of the base material as well as experimental and numerical compression tests of developed regular cellular structures. A regular honeycomb and four variants with gradually changing topologies of different relative density values have been successfully designed and produced in the TPU-Polyflex flexible thermoplastic polyurethane material using the Fused Filament Fabrication (FFF) 3D printing technique. Based on the results of performed technological studies, the most productive and accurate 3D printing parameters for the thermoplastic polyurethane filament were defined. It has been found that the 3D printed Polyflex material is characterised by a very high flexibility (elongation up to 380%) and a non-linear stress-strain relationship. A detailed analysis of the compression process of the structure specimens revealed that buckling and bending were the main mechanisms responsible for the deformation of developed structures. The Finite Element (FE) method and Ls Dyna software were used to conduct computer simulations reflecting the mechanical response of the structural specimens subjected to a quasi-static compression load. The hyperelastic properties of the TPU material were described with the Simplified Rubber Material (SRM) constitutive model. The proposed FE models, as well as assumed initial boundary conditions, were successfully validated. The results obtained from computer simulations agreed well with the data from the experimental compression tests. A linear relationship was found between the relative density and the maximum strain energy value.

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Section: Introductionmentioning

confidence: 99%

Deformation Process of 3D Printed Structures Made from Flexible Material with Different Values of Relative Density

et al. 2020

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“…The final blast loadings applied to the front plate depends on the mass of the charge and the length of the tube. Their measured profiles are presented in Figure 2c [12]. The movement of the front steel plate accelerated by the explosive wave causes a compression of the tested samples.…”

Section: Experimental Set-upmentioning

confidence: 99%

“…The bottom surface of the second block is fully constrained, simulating the experimental bunker wall. A more exact description of the numerical configuration is presented in [12,16]. Fig.…”

Section: Numerical Approachmentioning

confidence: 99%

Numerical and experimental study on mechanical behaviour of the AlSi10Mg aluminium structures manufactured additively and subjected to a blast wave

et al. 2021

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The paper is related to energy absorptive properties of additively manufactured metallic cellular structures. The samples of Honeycomb, Auxetic, rhomboidal Lattice and a regular Foam are subjected to a dynamic compression due to the blast tests. The cuboidal samples are manufactured by the Direct Metal Laser Sintering (DMLS) method using AlSi10Mg aluminium powder. The experimental tests are performed by means of an Explosive Driven Shock Tube (EDST). The measured results of the transmitted forces in relation to the shortening of the samples allow to analyse the deformation processes of each selected geometry. In addition, the evaluation of the structural responses leads to identification of the structure properties, such as the equivalent stress over equivalent strain or the energy absorption per a unit of mass. Moreover, the process of compression is modelled numerically using the explicit code LS-DYNA R9.0.1. The obtained simulations provide the complete analysis of the experimentally observed mechanisms.

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“…The * MAT_98 is one of several modelling approaches available in Ls-Dyna based on the Johnson–Cook flow model [ 23 ]. This material function does not account for temperature, and it is decoupled from the model of fracture proposed by Johnson and Cook [ 23 , 34 ]. The Ls-Dyna code has additional erosion criteria, which implement a simple, one-value fracture criterion in calculations.…”

Section: Numerical Modelling Of the Nera Laminates Upon Kep Impactsmentioning

confidence: 99%

Experimental and Numerical Study on a Non-Explosive Reactive Armour with the Rubber Interlayer Applied against Kinetic-Energy Penetrators—The ‘Bulging Effect’ Analysis

Frąś

2021

Materials

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The study concerns a protection system applied against kinetic-energy penetrators (KEPs) composed of steel plates sandwiching a rubber layer. Laminated steel-elastomer armours represent non-explosive reactive (NERA) armours that take advantage of a so-called ‘bulging effect’ to mitigate KEP projectiles. Upon an impact, the side steel plates deform together with the deforming rubber interlayer. Their sudden deformation (bulging) in opposite directions disturbs long and slender KEP projectiles, causing their fragmentation. The presented discussion is based on the experimental investigation, confirming that the long-rod projectiles tend to fracture into several pieces due to the armour perforation. A numerical simulation accompanies the ballistic test providing an insight into the threat/target interactions. The presented experimental–numerical study explains the principles of the analysed protection mechanism and proves the efficiency of the materials composition making up the laminated non-reactive protection system.

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

Cited by 22 publications

References 32 publications

Deformation Process of 3D Printed Structures Made from Flexible Material with Different Values of Relative Density

Deformation Process of 3D Printed Structures Made from Flexible Material with Different Values of Relative Density

Numerical and experimental study on mechanical behaviour of the AlSi10Mg aluminium structures manufactured additively and subjected to a blast wave

Experimental and Numerical Study on a Non-Explosive Reactive Armour with the Rubber Interlayer Applied against Kinetic-Energy Penetrators—The ‘Bulging Effect’ Analysis

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