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 T¨ / ubitak project 106M211 of MAG.
| Identifer | oai:union.ndltd.org:METU/oai:etd.lib.metu.edu.tr:http://etd.lib.metu.edu.tr/upload/12613534/index.pdf |
| Date | 01 August 2011 |
| Creators | Deniz, Tansel |
| Contributors | Yildirim, Orhan R. |
| Publisher | METU |
| Source Sets | Middle East Technical Univ. |
| Language | English |
| Detected Language | English |
| Type | M.S. Thesis |
| Format | text/pdf |
| Rights | To liberate the content for public access |
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