scholarly journals Behavior of High-Strength and Ultrahigh-Performance Concrete Targets Subjected to Relatively Rigid Projectile Impact

2021 ◽  
Vol 147 (10) ◽  
pp. 04021152
Author(s):  
Sanghee Kim ◽  
Hyeon-Jong Hwang ◽  
Thomas H.-K. Kang
Keyword(s):  
High Strength ◽  
Projectile Impact ◽  
Rigid Projectile

scholarly journals Resistance of an Optimized Ultra-High Performance Fiber Reinforced Concrete to Projectile Impact

Buildings ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 63
Author(s):  
Anna L. Mina ◽  
Michael F. Petrou ◽  
Konstantinos G. Trezos
Keyword(s):  
Reinforced Concrete ◽  
High Performance ◽  
High Performance Concrete ◽  
High Strength ◽  
Fiber Reinforced Concrete ◽  
Steel Fibers ◽  
Fiber Reinforced ◽  
Depth Of Penetration ◽  
Projectile Impact ◽  
High Performance Fiber

The scope of this paper is to investigate the performance of ultra-high performance fiber reinforced concrete (UHPFRC) concrete slabs, under projectile impact. Mixture performance under impact loading was examined using bullets with 7.62 mm diameter and initial velocity 800 m/s. The UHPFRC, used in this study, consists of a combination of steel fibers of two lengths: 6 mm and 13 mm with the same diameter of 0.16 mm. Six composition mixtures were tested, four UHPFRC, one ultra-high performance concrete (UHPC), without steel fibers, and high strength concrete (HSC). Slabs with thicknesses of 15, 30, 50, and 70 mm were produced and subjected to real shotgun fire in the field. Penetration depth, material volume loss, and crater diameter were measured and analyzed. The test results show that the mixture with a combination of 3% 6 mm and 3% of 13 mm length of steel fibers exhibited the best resistance to projectile impact and only the slabs with 15 mm thickness had perforation. Empirical models that predict the depth of penetration were compared with the experimental results. This material can be used as an overlay to buildings or to construct small precast structures.

Perforation model of thin rock slab subjected to rigid projectile impact at an intermediate velocity

2020 ◽  
Vol 139 ◽  
pp. 103536 ◽  
Author(s):  
H.Z. Xing ◽  
J. Zhao ◽  
G. Wu ◽  
D. Ruan ◽  
S. Dehkhoda ◽  
...  
Keyword(s):  
Projectile Impact ◽  
Rigid Projectile

Performance of concrete targets mixed with coarse aggregates against rigid projectile impact

2020 ◽  
Vol 141 ◽  
pp. 103565 ◽  
Author(s):  
Jie Zhang ◽  
Wensu Chen ◽  
Hong Hao ◽  
Zhiyong Wang ◽  
Zhihua Wang ◽  
...  
Keyword(s):  
Projectile Impact ◽  
Coarse Aggregates ◽  
Rigid Projectile

Evaluation of the Impact Formulae for Rigid Projectile Striking on Concrete Target

2011 ◽  
Vol 368-373 ◽  
pp. 894-900 ◽  
Author(s):  
Hao Wu ◽  
Qin Fang
Keyword(s):  
Penetration Depth ◽  
Empirical Formula ◽  
High Strength Concrete ◽  
High Speed ◽  
High Strength ◽  
Local Damage ◽  
High Speed Impact ◽  
Rigid Projectile ◽  
Semi Empirical ◽  
The Impact

Based on the large amounts of field impact tests with different projectile nosed shapes, the abilities of the existing classical empirical and semi-empirical impact formulae in predicting the local damage of normal and high strength concrete targets (NSCT & HSCT) under the strike of rigid projectile were evaluated. It finds that, firstly, for the penetration depth, the Forrestal and Chen & Li semi-empirical formulae, BRL and Whiffen empirical formulae are advised for the NSCT under the impact of ogive nosed projectile; and Chen & Li semi-empirical formula and ACE empirical formulae are advised for the NSCT under the impact of special nosed projectile; the dimensionless penetration depth of NSCT increases linearly with the non-dimensional impact factor. Secondly, for the penetration depth, Chen & Li semi-empirical formula is advised for the HSCT under the mid-to-high speed impact, and the existing formulae are not applicable while the speed of the projectile was relatively low. Thirdly, for the perforation mode of the target, the BRL and Chang empirical formulae are advised for the NSCT, and the Chen semi-empirical formula, ACE and BRL empirical formulae are advised for the HSCT.

scholarly journals Upon Using of Plastics Layer in Light Multilayered Armor

2019 ◽  
Vol 57 (2) ◽  
pp. 265-275
Author(s):  
Catalin Adetu ◽  
Vasile Nastasescu ◽  
Alina Elena Adetu ◽  
Florian Vladulescu
Keyword(s):  
High Strength ◽  
Lethal Effect ◽  
Plate Impact ◽  
Military Vehicle ◽  
Plastic Materials ◽  
Ballistic Protection ◽  
Rigid Projectile ◽  
Working Together ◽  
Low Mass ◽  
The Military

The concept of ballistic protection is a subject of great importance and is defined as representing all the capabilities of the military vehicle to withstand attacks, in order to ensure protection of the crew during the missions. The projectile-plate impact research must answer a series of questions on designer or fighter behalf, among which the most important would be whether the bullet penetrates or perforates and whether the velocity after the perforation ensures a lethal effect on the personnel. The current paper presents the numerical evaluation of the working together of aluminum layers with plastic materials in a multilayer structure with honeycomb core, on impact with a rigid projectile. Plastic materials have revolutionized many industries and they are increasingly used due to their main properties, low mass and high strength. The research included the use of plastics, the positioning within the panel and the study of the two constructive versions of the structure, with coupled and uncoupled layers. Post-processing model and interpretation of the results are offered and these could be enriched and customized for other situations, similar or less similar, implicitly, the method is provided, finding a quick answer to certain questions.

Energy Absorption Capability and Ballistic Resistance of Metallic Plates Subjected to High Velocity Impact

2020 ◽  
Vol 12 (1) ◽  
Author(s):  
P. Karthikeyan ◽  
P. Karthick ◽  
K. Ramajeyathilagam
Keyword(s):  
Energy Absorption ◽  
Impact Loading ◽  
High Velocity ◽  
Composite Plate ◽  
High Strength ◽  
Ballistic Resistance ◽  
Rigid Projectile ◽  
Steel Composite ◽  
Energy Absorbing ◽  
Metal Failure

Energy absorption capability and ballistic resistance are the main parameters considered while choosing the material against impact loading. The need for light weight structures with high strength against impact loading is increased in automobiles and military application. In this paper, the energy absorbing capacity and ballistic resistance of the aluminium, steel and combination of steel composite plate is studied. 300300mm metallic plate is subjected to rigid projectile impact under high velocity. The energy absorbed during plastic deformation, residual velocity, ballistic limit and metal failure is obtained from the numerical analysis using advanced finite element code LS Dyna and validated with analytical method. From the results, it is observed that the monolithic steel plate provides better resistance than the aluminium plate and steel aluminium composite plate.

scholarly journals Ballistic Limit of High-Strength Steel and Al7075-T6 Multi-Layered Plates Under 7.62-mm Armour Piercing Projectile Impact

2016 ◽  
Vol 13 (9) ◽  
pp. 1658-1676 ◽  
Author(s):  
N. A. Rahman ◽  
S. Abdullah ◽  
W. F. H. Zamri ◽  
M. F. Abdullah ◽  
M. Z. Omar ◽  
...  
Keyword(s):  
High Strength Steel ◽  
High Strength ◽  
Ballistic Limit ◽  
Layered Plates ◽  
Projectile Impact
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