An Abridged Review of Empirical Formulae for Computation of Penetration, Scabbing and Perforation Depth Under Projectile Impact

2021 ◽  
Author(s):  
M. D. Goel ◽  
Krishna Prasad Kallada ◽  
I. L. Muthreja
Keyword(s):  
Projectile Impact

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.

Projectile Impact Shock-Induced Deformation of One-Component Polymer Nanocomposite Thin Films

ACS Nano ◽  
2021 ◽  
Vol 15 (2) ◽  
pp. 2439-2446
Author(s):  
Jinho Hyon ◽  
Manny Gonzales ◽  
Jason K. Streit ◽  
Omri Fried ◽  
Olawale Lawal ◽  
...  
Keyword(s):  
Thin Films ◽  
Polymer Nanocomposite ◽  
Projectile Impact ◽  
Nanocomposite Thin Films ◽  
Impact Shock

On the influence of fracture criterion in projectile impact of steel plates

2006 ◽  
Vol 38 (1) ◽  
pp. 176-191 ◽  
Author(s):  
S. Dey ◽  
T. Børvik ◽  
O.S. Hopperstad ◽  
M. Langseth
Keyword(s):  
Fracture Criterion ◽  
Steel Plates ◽  
Projectile Impact

Response of 1100-H12 Aluminum Targets to Varying Span and Configuration

2013 ◽  
Vol 535-536 ◽  
pp. 539-542
Author(s):  
M.A. Iqbal ◽  
G. Tiwari ◽  
P.K. Gupta
Keyword(s):  
Failure Mode ◽  
Significant Influence ◽  
Ballistic Limit ◽  
Aluminum Target ◽  
Projectile Impact

The influence of target span as well as configuration was studied with 1 mm thick 1100H12 aluminum target subjected to19 mm diameter ogive nosed projectile impact. The effective span of 1 mm thick monolithic target was varied as 95, 190, 285, 380 and 475 mm. The configuration of 255 mm span diameter target was varied as 1 mm thick monolithic, double layered in-contact (2 x 0.5 mm) and double layered spaced. The spacing between the layers was also varied as 2, 5, 10 and 20 mm. The target was impacted normally by ogive nosed projectile to obtain the ballistic limit, failure mode and deformation. The ballistic limit was found to increase with an increase in span diameter. The monolithic target offered highest ballistic limit followed by layered in-contact and spaced targets respectively. The variation of spacing between the layers did not have significant influence on the ballistic limit.

Crack Propagation and Local Failure Simulation of Reinforced Concrete Subjected to Projectile Impact Using RBSM

2016 ◽  
Author(s):  
Yoshihito Yamamoto ◽  
Soichiro Okazaki ◽  
Hikaru Nakamura ◽  
Masuhiro Beppu ◽  
Taiki Shibata
Keyword(s):  
Reinforced Concrete ◽  
Crack Propagation ◽  
High Velocity ◽  
Failure Modes ◽  
Concrete Structures ◽  
Constitutive Models ◽  
Local Failure ◽  
High Velocity Impact ◽  
Velocity Impact ◽  
Projectile Impact

In this paper, numerical simulations of reinforced mortar beams subjected to projectile impact are conducted by using the proposed 3-D Rigid-Body-Spring Model (RBSM) in order to investigate mechanisms of crack propagation and scabbing mode of concrete members under high-velocity impact. The RBSM is one of the discrete-type numerical methods, which represents a continuum material as an assemblage of rigid particle interconnected by springs. The RBSM have advantages in modeling localized and oriented phenomena, such as cracking, its propagation, frictional slip and so on, in concrete structures. The authors have already developed constitutive models for the 3D RBSM with random geometry generated Voronoi diagram in order to quantitatively evaluate the mechanical responses of concrete including softening and localization fractures, and have shown that the model can simulate cracking and various failure modes of reinforced concrete structures. In the target tests, projectile velocity is set 200m/s. The reinforced mortar beams with or without the shear reinforcing steel plates were used to investigate the effects of shear reinforcement on the crack propagation and the local failure modes. By comparing the numerical results with the test results, it is confirmed that the proposed model can reproduce well the crack propagation and the local failure behaviors. In addition, effects of the reinforcing plates on the stress wave and the crack propagation behaviors are discussed from the observation of the numerical simulation results. As a result, it was found that scabbing of reinforced mortar beams subjected to high velocity impact which is in the range of the tests is caused by mainly shear deformation of a beam.

scholarly journals 3D finite element simulations of high velocity projectile impact

2015 ◽  
Vol 94 ◽  
pp. 04029
Author(s):  
Joško Ožbolt ◽  
Barış İrhan ◽  
Daniela Ruta
Keyword(s):  
Finite Element ◽  
High Velocity ◽  
Finite Element Simulations ◽  
3D Finite Element ◽  
Projectile Impact

Projectile Impact Ignition and Reaction Violent Mechanism for HMX-Based Polymer Bonded Explosives at High Temperature

2017 ◽  
Vol 42 (7) ◽  
pp. 799-808 ◽  
Author(s):  
Xiaogan Dai ◽  
Yushi Wen ◽  
Miaoping Wen ◽  
Fenglei Huang ◽  
Ming Li ◽  
...  
Keyword(s):  
High Temperature ◽  
Projectile Impact ◽  
Polymer Bonded Explosives

Biodynamics of Human Thorax With Body Armors Subject to Bullet Impact

2001 ◽  
Author(s):  
Y. W. Kwon ◽  
J. A. Lobuono
Keyword(s):  
Experimental Data ◽  
Finite Element ◽  
Finite Element Model ◽  
Element Model ◽  
Body Armor ◽  
Projectile Impact ◽  
Human Thorax ◽  
Trachea And Bronchi ◽  
Armor System ◽  
The Finite Element Model

Abstract The objective of this study is to develop a finite element model of the human thorax with a protective body armor system so that the model can adequately determine the thorax’s biodynamical response from a projectile impact. The finite element model of the human thorax consists of the thoracic skeleton, heart, lungs, major arteries, major veins, trachea, and bronchi. The finite element model of the human thorax is validated by comparing the model’s results to experimental data obtained from cadavers wearing a protective body armor system undergoing a projectile impact.

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