Ballistic penetration of hardened steel plates

Download

index.pdf

Date

2011

Author

Deniz, Tansel

Metadata

Show full item record

Item Usage Stats

139
views

99
downloads

Ballistic testing is a vital part of the armor design. However, it is impossible to test every condition and it is necessary to limit the number of tests to cut huge costs. With the intro- duction of hydrocodes and high performance computers; there is an increasing interest on simulation studies to cutoff these aforementioned costs. This study deals with the numerical modeling of ballistic impact phenomena, regarding the ballistic penetration of hardened steel plates by 7.62 mm AP (Armor Piercing) projectile. Penetration processes of AP projectiles are reviewed. Then, a survey on analytical models is given. After the introduction of fun- damentals of numerical analysis, an intensive numerical study is conducted in 2D and 3D. Johnson Cook strength models for the four different heat treatments of AISI 4340 steel were constructed based on the dynamic material data taken from the literature. It was found that 2D numerical simulations gave plausible results in terms of residual projectile velocities, con- sidering the literature review. Then, 3D numerical simulations were performed based on the material properties that were selected in 2D studies. Good agreement was obtained between the numerical and test results in terms of residual projectile velocities and ballistic limit thick- nesses. It was seen that the ballistic protection efficiency of the armor plates increases with the increasing hardness, in the examined range. This study is a part of T̈ubitak project 106M211 of MAG.

Subject Keywords

Ballistic.

URI

http://etd.lib.metu.edu.tr/upload/12613534/index.pdf
https://hdl.handle.net/11511/20876

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

Theoretical investigation and design for x-ray lasers and their lithographic application Demir, Pınar; Bilikmen, Kadri Sinan; Department of Physics (2008) Grazing incidence pumping (GRIP) is a scheme to produce x-ray lasers and extreme ultraviolet lithography is a means of lithographic production which requires soft x-rays with a bandwidth of 2% centred at 13,5 nm. In this work firstly a grazing incidence pumping of Ni-like Mo and Ne-like Ti x-ray laser media were simulated by using EHYBRID and a post-processor code coupled to it. The required atomic data were obtained from the Cowan code. Besides, the timing issue needed for amplification purpose in a Ti:Sap...
Non-uniform axial electric field in argon glow discharge plasma Akbar, D.; Bilikmen, S. (IOP Publishing, 2006-05-01) The non-uniform argon dc glow discharge plasma system has been constructed in a very special design to investigate the effects of variable tube radius on plasma parameters. By using isolated computer controlled three couples of a double probe (TCDP) system, the electron temperature, electron density, the reduced electric field, and electron drift velocity are measured at low and intermediate pressures. It is shown that the electron temperature and reduced electric field (density) decreases (increases) as th...
Experimental analysis and wear modeling for mechanical components of a typical rail launcher Akkök, Metin; Acmaz, Emre (2013-08-30) One of the most important design considerations for rocket launchers is its maintainability and one of the most important parameter which affects the maintainability is wear in launchers. Therefore, for predicting the life-time of a launcher, wear should be investigated beside other parameters such as fatigue etc. In this study, experimental and modeling of dry sliding wear in some mechanical parts of a typical rail launcher, used in helicopters, were made. Firstly, measurements about the material loss, whi...
Tailoring one dimensional novel nano structures for specific applications using tools of molecular modeling Malcıoğlu, Osman Barış; Erkoç, Şakir; Department of Physics (2008) In this work, the use of theoretical tools of molecular modeling for tailoring 1D novel nanomaterials is demonstrated. There are four selected nano-structures as examples, each tailored for a speci c demand of nano-technology that is yet to be ful lled. For the purpose of modeling/calculating the electronic and structural properties, various methods of de ning the interatomic interaction, such as empirical potential energy functions, semi-empirical methods and density functional theory, are used. Each of th...
Electronic properties of dye molecules adsorbed on anatase-titania surface for solar cell applications Torun, Engin; Toffoli, Hande; Department of Physics (2009) Wide band gap metal oxides have recently become one of the most investigated materials in surface science. Among these metal oxides especially TiO2 attracts great interest, because of its wide range applications, low cost, biocompatibility and ease of analysis by all experimental techniques. The usage of TiO2 as a component in solar cell technology is one of the most investigated applications of TiO2 . The wide band gap of TiO2 renders it ine cient for isolated use in solar cells. TiO2 surface are therefore...

Citation Formats

T. Deniz, “Ballistic penetration of hardened steel plates,” M.S. - Master of Science, Middle East Technical University, 2011.