Projectile penetration of reinforced concrete blocks: Test and analysis

Kamal, Ismail M.; El-Tehewy, Essam

doi:10.1016/j.tafmec.2012.06.005

Cited by 36 publications

(12 citation statements)

References 11 publications

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“…Pavlovic and Fragassa (2018) [15] evaluated the resistance level of reinforced concrete barriers subjected to ballistic impact, the study was done with explicit Finite Element (FE) simulations and the results were compared to experiments on similar RC barriers. Kamal and Eltehewy (2012) [16] investigated the penetration resistance of concrete blocks reinforced by different number of layers of woven wire steel mesh experimentally and numerically using a steel blunt-nose projectile with a diameter of 23 mm with striking velocity about 980 m/s, they found an overall reduction in penetration depth and damage of target when with using wire meshes as a reinforcement. Richardson et al (2016) [17] compared the impact performance of fiber concrete to plain concrete to predict the damage of concrete in both cases, they simulated concrete slabs with finite element model and tested the use of two types of fibers as a reinforcement in concrete samples.…”

Section: Introductionmentioning

confidence: 99%

Investigation of High-Velocity Projectile Penetrating Concrete Blocks Reinforced by Layers of High Toughness and Energy Absorption Materials

Elhozayen

Laissy²,

Attia

2019

Civ Eng J

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Recently, the need to protect people and structures against attacks of terrorists are of a high increase. The main objective of this paper is to enhance the concrete resistance against ballistic impact of high velocity projectile by using different combination layers from different materials as reinforcement for concrete and investigate their effect on the penetration depth of projectile and the resulted damage of concrete. The investigation presents the development of a finite element accurate models using AUTODYN 3D. The Lagrangian formulation numerical techniques is used to model the projectile and concrete target. The investigated models are reinforced using different layers combinations of several materials such as ceramics, fiber composite, polymer and metal: (AL2O3 - 99.7% and Kevlar- epoxy, Teflon and aluminum alloy 6061-T6) .Those materials were chosen because of their high thermal shock resistance or their great capability in energy absorption. The main findings showed a significant enhancement in the reduction of penetration depth compared to the concrete resistance without reinforcement, which demonstrate the great performance of the used combinations in the shock wave propagation. Hence from the findings of this work we can say that the concrete reinforced by ceramics or aluminum alloy with fiber composite or polymer can be used for several applications as it represents a successful anti-penetration composite structure.

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Section: Introductionmentioning

confidence: 99%

Investigation of High-Velocity Projectile Penetrating Concrete Blocks Reinforced by Layers of High Toughness and Energy Absorption Materials

Elhozayen

Laissy²,

Attia

2019

Civ Eng J

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“…Concrete with steel reinforcement grids, also called Ferrocement, is often used with plain concrete panels and ECCs. Kamal determined that one steel layer and three steel layers of Ferrocement on each face of plain panels reduces the penetration depth by 27.5% and 30%, respectively, but increasing the quantity has little effect on the penetration depth. However, similar to the fiber phenomenon, the increased Ferrocement has more significant effect on the front/rear face damage.…”

Section: Introductionmentioning

confidence: 99%

Numerical analysis of projectile penetration and perforation of plain and fiber reinforced concrete slabs

Smith

Cusatis

2016

Num Anal Meth Geomechanics

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Summary The research presented in this paper deals with the numerical analysis of projectile impact on regular strength concrete (RSC), high‐strength concrete (HSC), and engineered cementitious composites (ECC) using the Lattice Discrete Particle Model (LDPM). The LDPM is chosen in this study as it naturally captures the failure mechanisms at the length scale of coarse aggregate of concrete, and its capabilities include the accurate depiction of both intrinsic and apparent rate effects in concrete, as well as fiber reinforcement effects. The model is used to predict the experimental impact response performed by four independent testing laboratories, and for each data set the model parameters are calibrated and validated using a combination of uniaxial compression, triaxial compression, uniaxial strain compression, and dogbone tests. In the first study, perforation experiments on RSC and HSC for varied impact velocities are carried out, and the exit velocity is compared with the available experimental data. The second study focuses on ECC, where multiple impact of steel and plastic fiber reinforced concrete panels are explored. A third investigation is performed on four RSC panels with varied thicknesses and subjected to the same impact velocity. In this instance, the model is used to predict the penetration depths for the different cases. Finally, in the last study, the response of large‐thickness infinite panels of sizes ranging from 300 mm to 700 mm under projectile impact is considered. Copyright © 2016 John Wiley & Sons, Ltd.

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“…Even though numerical erosion is primarily used to filter out problem elements from the calculation, it can also be suitably used to aid in the simulation of cracks, penetration or perforation, and also the fragmentation of matter. The technique of combining the FEM and element erosion is often used in high-speed simulations, particularly in the simulation of penetration and perforation [14][15][16][17][18][19]. However, the criterion of element erosion is not unambiguous [20] and can affect the results of the simulation [11].…”

Section: Introductionmentioning

confidence: 99%

“…However, the criterion of element erosion is not unambiguous [20] and can affect the results of the simulation [11]. For example, the damage parameter is selected as an erosion parameter in [14], while in [15] it is maximum tensile stress, in [16,18] it is geometric strain, in [17] it is fracture strain, and in [19] the erosion parameter is a combination of the damage parameter value and the maximum principal strain. Despite the use of advanced numerical techniques, the results of simulations are still being compared, most frequently with the values from analytical relationships obtained from an extensive amount of experiments [21,22].…”

Section: Introductionmentioning

confidence: 99%

“…The dissipation of matter from calculations as a result of the deletion of elements can be a significant problem in cases where the numerical erosion technique is used. In the majority of cases, this problem is omitted and left unsolved [14][15][16][17][18][19]. So, why use the FEM method for high-speed load simulations when so many problems and complications arise during calculations?…”

Section: Introductionmentioning

confidence: 99%

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Improved Element Erosion Function for Concrete-Like Materials with the SPH Method

Kala

Hušek

2016

Shock and Vibration

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The subject of the paper is a description of a simple test from the field of terminal ballistics and the handling of issues arising during its simulation using the numerical techniques of the finite element method. With regard to the possible excessive reshaping of the finite element mesh there is a danger that problems will arise such as the locking of elements or the appearance of negative volumes. It is often necessary to introduce numerical extensions so that the simulations can be carried out at all. When examining local damage to structures, such as the penetration of the outer shell or its perforation, it is almost essential to introduce the numerical erosion of elements into the simulations. However, when using numerical erosion, the dissipation of matter and energy from the computational model occurs in the mathematical background to the calculation. It is a phenomenon which can reveal itself in the final result when a discrepancy appears between the simulations and the experiments. This issue can be solved by transforming the eroded elements into smoothed particle hydrodynamics particles. These newly created particles can then assume the characteristics of the original elements and preserve the matter and energy of the numerical model.

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Projectile penetration of reinforced concrete blocks: Test and analysis

Cited by 36 publications

References 11 publications

Investigation of High-Velocity Projectile Penetrating Concrete Blocks Reinforced by Layers of High Toughness and Energy Absorption Materials

Investigation of High-Velocity Projectile Penetrating Concrete Blocks Reinforced by Layers of High Toughness and Energy Absorption Materials

Numerical analysis of projectile penetration and perforation of plain and fiber reinforced concrete slabs

Improved Element Erosion Function for Concrete-Like Materials with the SPH Method

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