BALLISTIC BEHAVIOR OF PERFORATED ARMOR PLATES AGAINST 7,62 MM AP PROJECTILE ABSTRACT

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Gülbahar Türker
6 yıl önce
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1 M (a) (b) (c) Doç.Dr.Bülent Ekici (d) (e) (a) (b) (c) kar.com.tr (d) Marmara Üniversitesi Makine Müh., G bulent.ekici@marmara.edu.tr (e) Çukurova Universitesi Makine Müh., Adana, akeksi@cu.edu.tr ÖZ gerilmeleri ve aç için Johnson- n er. Analizlerde malzemenin yüksek gerin -Dyna Anahtar Kelimeler: Balistik, Perfore Plakalar, Ekslisit Analiz, JC Malzeme Modeli BALLISTIC BEHAVIOR OF PERFORATED ARMOR PLATES AGAINST 7,6 MM AP PROJECTILE ABSTRACT Use of erforated armor lates as alique armor induces bending stress mainly to break incoming rojectile core or at least divert it from its incident trajectory and thus substantially reduce its residual enetration caability through base armor. In this aer, the ballistic resistance of erforated lates made of high hardness armor steel was investigated with an commerical exlicit code, Ls-Dyna. The Johnson-Cook material model is used for target and rojectile material as it is well suited to model metals that are subjected to high strain rate loading. Numerical results correlated with tests. Keywords: Ballistics, Perforated Armor Plates, Exlicit Simulation, JC Material Model 505

2 . Hem askeri hem r için uzun içermektedir. Oldukça komleks girdileri olan balistik erformans roblemlerinin incelenmesi irilmesini gerekmektedir. Perfore Perfore ha eklenmektedir. Literatürde bu hedeflenmektedir. Analiz rfo - 506

3 için Johnson- an.. [8] Gerek. Geometrik Model Geometrik model önde 5,5 mm erfore - 507

4 .. Malzeme Modeli Hedef ve - alarak [] ifade edilir: Y A B C log n * T m H arantez stat * H=(T-T room )/(T melting -T room ) }. boyutsuz lastik gerinme, T H homolog D f ve f * D D ex( D3 *) D4 ln 5 D T H * -D5 ise test, etkin lastik gerinim için simülasyonlarda JC arametreleri olarak A = 470 MPa, B = 70 MPa, n = 0.99, C = m = 0.8 kulla ]. arametreleri D=0,068, D=5,38 D3=-,

5 Test ve gerilim testleri 3). n deneylerle larda gerinme 3. 4% uzamada ve. GPa numuneleri modeli - lgeye göre 509

6 .3 Hal Durum Denklemleri 4. Çelik Çekirdek Çekme Testi -Gruneisen durum denklemi P S 0 C S / S 3 3 / E 0 ve E 0, S,S,S 3 Gruneisen sabitidir. hacim düzeltme tleri durum denklemi l P = K 3. TESTLER minyum seviyeleri +/-5 m/s hassasiy i mmat 50

7 Testlerde edilen sonuçlar olurken sadece 5. zere normalde 6 mm 3 kg/m 6 da verilmektedir. etki

8 4. SONUÇ,c aralel ola azalmakta a b c d e f 8. deforma ) Hedef laka üstüne mühimmat 5

9 5. KAYNAKÇA [] Bangash M.Y.H., Shock, Imact and Exlosion Structural Analysis and Design, Sringer 009 [] Ben-Dor G., Dubinsky A., Elerin T., Ballistic Imact: Recent Advances in Analytical Modelling of Plate Penetration Dynamics, ASME Alied Mechanics Reviews Nov 005 Vol [3] Patent No: WO 00/0364 A Perforated Armor With Geometry Modified for Lighter Weight 9 May 008 [4] Patent No: US 006/03360 A Perforated Armor Plates, 8 Se 006 [5] Patent No: 5,04,593 Perforated Plate Armor 4 May 99 [6] Balos S., Grabulov V., Sidjanin L. Pantic M., Radisavljevic I. Geometry, mechanical roerties and mounting of erforated lares for ballistic alication Materials and Design, Vol 3.:96-94, Dec 009 [7] Chocron S., Anderson C.E., Grosch D.J., Poelar C.H., Imact of the 7,6 mm APM rojectile against the edge of a metallic target, Inernational Journal of Imact Engineering Vol 5,.:43-437, Oct 000 [8] Thyssen Kru Material Secification for Secure 500, Aug 006 [9] [0] Belirlenmesi USMOS 009, SAVTEK 00 [] Johnson G.R., Cook W.H., A Constitutive Model and Data for Metals Subjected to Large Strains, High Strain Rates and High Temeratures, [] Skoglund P., Nilsson M., Tjernberg A., Fracture Modelling of a High Perfromance Armour Steel, J.of Physic IV France Vol 34, 006, 97-0 [3] Buchar J., Voldrich J., Rolc S., Lisy J., Ballistic Performance of Dual Hardness Armor, 0 th International Symosium on Ballistics Orlando, 3-7 Se 00 [4] Li J., Li X.J., Zhao Z., Ou Y.X., Jiang D.A., Simulation on Projectile with High Rotating Seed Penetration into the Moving Vehicular Door, Theoretical and Alied Fracture Mechanics Vol 47, 007,

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