scholarly journals On the ballistic limit of an aerial vehicle impacting against a thin metal screen at a high velocity

2019 ◽  
Author(s):  
V. I. Pusev ◽  
A. M. Kuslya ◽  
V. A. Markov ◽  
Yu. V. Popov ◽  
S. I. Sychev
Keyword(s):  
High Velocity ◽  
Thin Metal ◽  
Ballistic Limit ◽  
Metal Screen ◽  
Aerial Vehicle

Modelling High Velocity Impact on Aluminium Alloy 7075-T6 under Axial Pretension

2014 ◽  
Vol 629 ◽  
pp. 498-502 ◽  
Author(s):  
K.A. Kamarudin ◽  
Al Emran Ismail
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Aluminium Alloy ◽  
High Velocity ◽  
Numerical Study ◽  
Element Model ◽  
Ballistic Limit ◽  
High Velocity Impact ◽  
Velocity Impact

This paper explains the utilisation of finite element model to analyse the ballistic limit of aluminium alloy 7075-T6 impacted by 8.33 g with 12.5 mm radius rigid spherical projectiles. This numerical study was compared with the results obtained experimentally. During impact, the targets were subjected to either non- or uniaxial- pretension and the projectile travelled horizontally to the target. It was observed that pretensioned targets were more vulnerable, which reduced the ballistic limit. The existence of harmful failures owing to pretension impact was ascertained and compared with the non-pretension targets.

scholarly journals Пропускание света тонким металлическим экраном с бесконечным массивом периодических нанощелей

2019 ◽  
Vol 127 (10) ◽  
pp. 648
Author(s):  
Н.В. Селина
Keyword(s):  
Theoretical Data ◽  
Rational Method ◽  
Thin Metal ◽  
Periodic Array ◽  
Metal Screen ◽  
Calculation Results

AbstractA rational method for calculating the transmission of light by a thin metal screen with an infinite periodic array of subwavelength slits is proposed. The calculation results agree well with available experimental and theoretical data.

High-velocity perforation behaviour of sandwich panels with Al/SiCp composite foam core

2019 ◽  
Vol 54 (11) ◽  
pp. 1483-1495
Author(s):  
M Golestanipour ◽  
A Babakhani ◽  
S Mojtaba Zebarjad
Keyword(s):  
High Velocity ◽  
Sandwich Panels ◽  
Sheet Thickness ◽  
Foam Core ◽  
Ballistic Limit ◽  
Absorbed Energy ◽  
Composite Foam ◽  
Good Energy ◽  
Energy Absorbers ◽  
Energy Absorbing

Aluminium foam core sandwich panels are good energy absorbers for impact protection applications, such as light-weight structural panels, packing materials and energy absorbing devices. In this study, the high-velocity perforation response of a range of sandwich panels with Al A356/SiCp composite foam core and 1100 aluminium face-sheets has been investigated using a conventional gas gun. Impact perforation tests were carried out using a 10-mm diameter conical nosed indenter at velocities up to that required to achieve complete perforation of the target (i.e. 230 m/s). The effects of face-sheet thickness, density and thickness of aluminium composite foam core on the total, specific and extra absorbed energy and also ballistic limit of the panels during impact penetration were experimentally investigated. During test, top face-sheets globally bended and tore into several pieces and so absorbed part of impact energy. Rupture and densification are two deformation modes and energy absorption mechanisms of foam core. Localized indentation and tearing, global bending and delamination were also observed on back face-sheets. Higher foam core density and thickness and also thicker face-sheets resulted in higher absorbed energy and ballistic limit.

Ballistic limit determination of an aircraft with high-speed impact on a thin metal barrier

2019 ◽  
Author(s):  
V. V. Selivanov ◽  
V. A. Markov ◽  
Yu. V. Popov ◽  
V. I. Pusev
Keyword(s):  
High Speed ◽  
Thin Metal ◽  
Ballistic Limit ◽  
High Speed Impact ◽  
Metal Barrier
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