The effect of concrete target diameter on projectile deceleration and penetration depth

Frew, D. J.; Forrestal, M. J.; Cargile, James

doi:10.1016/j.ijimpeng.2005.01.012

Cited by 138 publications

(79 citation statements)

References 11 publications

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“…More recently, Forrestal et al [17] suggested the use of a parameter ''R'' for the resistance of the target instead of the strength under simple compression of the concrete, this parameter to be set up for each family of impact tests. This model was used to describe the impact behaviour of ordinary concretes impacted by larger diameter projectiles (76.2 mm) [17,18]. Table 1 shows a comparison between the ballistic tests of this study and that reported by other authors [1,[5][6][7][8].…”

Section: Introductionmentioning

confidence: 92%

“…In particular, since the projectiles are of high-strength steel, they suffer very little deformation, so their straight penetration creates a tunnel around which the material is heavily damaged. All around this tunnel, the abundant radial cracking propagates throughout the target, and the fore and rear faces of the target may be chipped off, depending on the thickness of the target [13,14,18].…”

Section: Introductionmentioning

confidence: 99%

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Role of porosity in controlling the mechanical and impact behaviours of cement-based materials

Forquin

Árias

Zaera

2008

International Journal of Impact Engineering

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This work deals with the influence of porosity on the tensile, the compressive and the impact behaviours of two fine cementitious mortars one with silica fume and one without. The addition of silica fume is shown to change the pore size distribution. The mix without silica fume is characterized by porosity at the scale of the grains of fine sand (approximately 100 mm), while silica fume addition results in a more porous matrix with pore sizes of millimetre length size. The mortar with silica fume shows a higher quasi static compressive and flexural strength whereas the mix without silica fume is observed to be less compressible (by irreversible reduction of volume) under heavy confinement pressure (quasi oedometric tests) and shows better ballistic performance. A numerical simulation of the impact tests employing the Krieg, Swenson and Taylor model, which accounts for both deviatoric and volumetric inelastic behaviour of the material, was undertaken using the data from quasi oedometric tests. These calculations follow the experimental results and confirm the influence of the macroscopic porosity on the impact performance of cement based materials.

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Section: Introductionmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Role of porosity in controlling the mechanical and impact behaviours of cement-based materials

Forquin

Árias

Zaera

2008

International Journal of Impact Engineering

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“…3 in the work by Frew & Forrestal 24 , et al there exists negligible change in the DOP as ϕ t /ϕ increases from 12 up to 24, which makes it reasonable to infer that Π tends to a non-zero finite value as Π 3 →∞. In other words, for sufficiently large Π 3 , there exits complete similarity in the parameter Π 3 .…”

Section: Similarity Analysismentioning

confidence: 92%

Similarity Analysis of Projectile Penetration into Concrete

Huang

Tong

et al. 2018

Def. Sc. Jl.

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A dimensionless model for the depth of penetration (DOP) of a projectile penetrating into a concrete target, based on the similarity theory involving intermediate asymptotics, complete similarity, and incomplete similarity is presented. The calculated numerical results are in good agreement with previous experimental data, including two sets of full-scale and twenty-four sets of sub-scale penetration of non-deformable projectiles into concrete targets. Moreover, compared with several empirical and semi-empirical DOP models, the new model is applicable within a relatively broader range, including the penetration of both sub-scale and full-scale projectiles. For the limitations of the validity, dimensionless parameters Π 3 =ϕ t /ϕ larger than 12, Π 4 = (ϕ 3 f c )/(Mv 0 2 ) smaller than 0.1, and the initial impact velocity of the projectile less than about 900 m/s to 1000 m/s are necessary for the model.

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“…To compare the penetration depth of c1~c5 and to ensure the same initial velocity of the projectile, the penetration depth should be modified. After the crater stage, the deceleration of a rigid ogive-nose projectile penetrating into a semi-infinite concrete target at medium speed approaches a constant (Rosenberg and Dekel, 2010;Frew et al, 2006). For deep penetration, the penetration depth is approximately proportional to the square of the velocity.…”

Section: Modification Of the Penetration Depth Test Datamentioning

confidence: 99%

Study of the anti-penetration performance of concrete with different coarse aggregate content

Wu¹,

Li²,

Shen³

2018

Lat. Am. j. solids struct.

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Deep penetration experiments were performed on five types of concrete with different coarse aggregate content. The projectile diameter was 29.9 mm, the initial velocity was 647 m/s, and the volume fraction of the coarse aggregate was between 0% and 59.0%. The damage laws and damage mechanism of the target were analyzed. The pure mortar target had the smallest radial crack origin diameter and crater depth. Too high of the coarse aggregate content led to the formation of many voids, which led to the disappearance of radial cracks, crater surface bypassing the coarse aggregate and a large reduction of crater diameter. The influence laws and mechanism of the coarse aggregate on the penetration depth were also analyzed. The increase of volume fraction of coarse aggregate was beneficial to reducing penetration depth and the increase of voids volume fraction was opposite. The penetration depth was the lowest when the volume fraction of the coarse aggregate reached the maximum and no voids formed. By modifying the static resistance stress in the Forrestal penetration formula, a penetration depth model considering the volume fractions of the coarse aggregate and voids was established. The predicted results were in good agreement with the experimental results.

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The effect of concrete target diameter on projectile deceleration and penetration depth

Cited by 138 publications

References 11 publications

Role of porosity in controlling the mechanical and impact behaviours of cement-based materials

Role of porosity in controlling the mechanical and impact behaviours of cement-based materials

Similarity Analysis of Projectile Penetration into Concrete

Study of the anti-penetration performance of concrete with different coarse aggregate content

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