On the comparison of the ballistic performance of steel and laminated composite armors

Steels have been widely used as armour materials in defence applications, but they have the disadvantage of a relatively high density. Hence, they are not suitable for lightweight armour production. On the other hand, laminated composites have important potential on the reducing armour weight compared to steels for the same ballistic protection. This study presents the ballistic performance of steel against 7.62 mm armour piercing projectiles. High strength low alloy steel (50CrV4) was chosen as steel armour for ballistic testing. Three areal density values were kept constant to compare ballistic performance of steel armour specimens with alumina/aluminum laminated composite specimens. In addition, in steel samples, the effect of hardness on the ballistic performance was examined. Furthermore, failure mechanisms were investigated after ballistic testing. According to the experimental results, laminated composites maintained 26% weight saving compared to steel.


On the drop-weight testing of alumina/aluminum laminated composites
Ubeyli, M; Yıldırım, Raif Orhan; Ögel, Bilgehan (2005-10-01)
Laminated composites with ceramic front layers and metallic or composite backing layers have gained attractiveness as 11,lightweight armours, as they exhibit the same ballistic performance with lower area] densities as compared to steels. Drop-weight testing (DWT) has potential for evaluating the low velocity impact behaviour or materials. This testing gives significant ideas and information about failure mechanisms and behaviour of materials under low velocity impact. In this study, DWT of alumina/aluminum...
Investigation on the ballistic behavior of Al(2)O(3)/Al2O24 laminated composites
Ubeyli, Mustafa; Yıldırım, Raif Orhan; Ögel, Bilgehan (2008-01-21)
Laminated composites have great potential in producing lightweight armors. This study presents the experimental study of the low velocity ballistic behavior of Al(2)O(3)/Al2O24 (alumina/aluminum) laminated composites against 7.62 x 51 mm armor piercing (AP) projectiles. The effects of mechanical properties of backing material and laminating type as well as the adhesive type on the ballistic performance of the composite armor were investigated. Furthermore, an inspection of the fracture surfaces was carried ...
A study on material properties of autoclaved aerated concrete (AAC) and its complementary wall elements : their compatibility in comtemporary and historical wall sections
Andolsun, Simge; Tavukçuoğlu, Ayşe; Department of Building Science in Architecture (2006)
Examined in this study were some physical, mechanical, compositional and durability properties of AAC, its neighboring plasters and jointing adhesive, all of which were produced in Turkey. The compatibility of these materials inside the contemporary wall section and within historic fabric was discussed in terms of their material properties. In addition to the literature survey, laboratory studies were conducted on two types of AAC as G2 and G4, its jointing adhesive and exterior finishing layers as base coa...
A new look at oxide formation at the copper/electrolyte interface by in situ spectroscopies
Toparlı, Çiğdem; Erbe, Andreas (2015-01-01)
The widely used engineering material copper is a prototype of an electrochemically passive metal. In this work, the passive films on evaporated copper in 0.1 M NaOH are investigated in situ and operando by spectroscopic ellipsometry and Raman spectroscopy, both conducted during oxidation in potentiostatic step experiments. Oxide growth is initiated by jumping from a potential at which the surface is oxide-free to -0.1 V vs. Ag vertical bar AgCl vertical bar 3 M KCl (+0.11 V vs. standard hydrogen electrode, ...
Hosseinpour Dashatan, Saeid; Arıkan, Mehmet Ali Sahir; Parnas, Kemal Levend; Department of Mechanical Engineering (2021-8-13)
In some applications of composite laminates, thickness variation is necessary to fulfill specific design requirements. One way of accomplishing the intentional thickness variation in composite structures is terminating some plies within a layup. Introducing ply drop-offs causes geometrical and material discontinuities, which lead to high localized stresses around drop-off locations. Despite all the progress made in damage analyses of tapered composite laminates, estimating their load-carrying capacity and s...
Citation Formats
M. Ubeyli, R. O. Yıldırım, and B. Ögel, “On the comparison of the ballistic performance of steel and laminated composite armors,” MATERIALS & DESIGN, pp. 1257–1262, 2007, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/30123.