Investigations on the mechanism and behavior of dynamic energy absorption of metal foam

In recent years, hybrid composite materials are of increasing interest during the search for new materials to be used as ballistic barriers (shields) and kinetic energy absorbers. The main objective of this study is to test the energy absorption capacity of Zn-Al alloys filled with various polymer materials (epoxy resin, polyurethane resin and silicone). The ballistic resistance of modern hybrid materials to direct firing of a 5.56 × 45 mm SS109 projectile and during quasi-static piercing test is examined. Next, a numerical simulation in the ABAQUS environment is performed. In order to accurately reproduce the foam structure, a computed microtomography (CT) system is used. In the simulation of deformations of viscoplastic bodies, the Lagrange and Smoothed Particle Hydrodynamic (SPH) methods are applied. The obtained results from numerical analyses are verified with experimental results. Metallic foams are proven to have only a remote influence on the impact load, while, when filled with polyurethane resin, they show resistance to the overshoot. Performed simulation supports the detailed analysis of the impact energy dissipation for each of the samples.

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“…9a, c and e). The obtained results largely correspond to the results of the literature [43][44][45][46].…”

Section: Perforation Testsupporting

confidence: 89%

“…It should be noted that sample 1 has the worst energy consumption parameters. This is to be expected because the aluminium alloy from which the core was made has average parameters in the field of impact resistance, as demonstrated in earlier studies by the authors [44,45]. Reinforcing the analysed alloy brought measurable effects.…”

Section: Discussionsupporting

confidence: 55%

Experimental and Numerical Study of Ballistic Resistance of Composites Based on Sandwich Metallic Foams

et al. 2021

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“…The deformed Gyroid is generated by varying the scale in the TPMS equation (6). Based on the input scale the pore size and strut size varies.…”

Section: Design Of Tpms Structuresmentioning

confidence: 99%

Evaluation of energy absorption capabilities and mechanical properties in FDM printed PLA TPMS structures

Sankineni

Kumar

2021

Proceedings of the Institution of Mechanical Engineers, Part C:

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Additive manufacturing is an advanced technology used to fabricate complex geometries with unique properties like cellular structures which accommodate repeated unit cells located in the x, y and z direction. These structures can be used as infill patterns due to their self-supporting structure. Among the cellular structures, Triply Periodic Minimal Surface (TPMS) structures such as Gyroid, Diamond and Schwarz Primitive (SchwarzP) structures can be tailored to produce complex structures for various applications like tissue engineering scaffolds and replace the conventional polymeric foams. TPMS structures are designed and manufactured by using the Fused Deposition Modelling (FDM) technique using Poly-Lactic Acid (PLA) as material. Among TPMS structures, Gyroid is having a unique property like structurally symmetric which design was modified to enhance the mechanical properties. The modified Gyroid or deformed Gyroid undergone a quasi-static compression test and compare the results with Diamond and SchwarzP structures. Porosity and permeability coefficients are evaluated and an optical microscope is used to verify the fabricated components. As well as, Failure patterns of the structures were evaluated and energy absorption capabilities determined. The main objective of this paper is to evaluate the impact of design and porosity on the mechanical and morphological properties of TPMS structures. In conclusion, the deformed Gyroid has more energy absorption capability up to the 11.6% strain than other TPMS structures. After 11.6% of strain, SchwarzP structure dominates.

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“…It has been reported that the morphological simulation of foamed structures can be performed using two approaches: ideal models and real ones. The former uses ideal foam structures for simulation including random Voronoi polyhedral cells or Weaire–Phelan foams [closed-cell foams of polystyrene (PS) − and metal , ] and randomly packed spherical cells, while the latter uses experimental data for the distribution of foam cells.…”

Section: Introductionmentioning

confidence: 99%

Real 3D Structure-Based Finite Element Simulation of Elastomer Foams: Effect of the Foaming Agent Content

Heydari

Esmizadeh

Vahidifar

et al. 2022

Ind. Eng. Chem. Res.

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In this study, elastomer foams based on natural rubber were fabricated using a one-step compression molding procedure to determine how the foaming agent (FA) content affects the morphological and mechanical properties of rubber foams. Finite element methods (FEMs) were used to simulate the uniaxial compression behavior of the foams at both the micro-and macrolevels. The results obtained from FEM analyses were then compared with the results of various hyperplastic models and experimental data. A continuous decrease in the cell size from 561 to 236 μm (∼57%) and a gradual increase in the cell density from 32 to 469 cell/mm 3 (∼14 times) was observed with increasing the FA content from 2 to 10 phr via scanning electron microscopy (SEM) micrograph analysis. The key to building a real three-dimensional (3D) structure of the rubber foam is to combine several two-dimensional SEM micrographs. The produced real 3D structures revealed that a more uniform cell morphology and lower structural defects were observed in elastomer foam samples with a higher FA content. The mechanical results demonstrated an improvement in modulus (∼70%), hardness (∼107%), and resilience (∼67%) with increasing the FA content. The FEM analyses at the macroscopic level were in perfect agreement with the experimental data, with an average deviation of less than 6%. Additionally, the microlevel FEM analysis revealed a substantial reduction in the maximum amount of stress concentration and microstrain with a higher FA content.

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Investigations on the mechanism and behavior of dynamic energy absorption of metal foam

Cited by 7 publications

References 26 publications

Experimental and Numerical Study of Ballistic Resistance of Composites Based on Sandwich Metallic Foams

Experimental and Numerical Study of Ballistic Resistance of Composites Based on Sandwich Metallic Foams

Evaluation of energy absorption capabilities and mechanical properties in FDM printed PLA TPMS structures

Real 3D Structure-Based Finite Element Simulation of Elastomer Foams: Effect of the Foaming Agent Content

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