Penetration analysis of a projectile in ceramic composite armor

Abstract In this research an armor material with constant thickness has been studied. The armor consists of two layers: one is a boron carbide ceramic and the other is Kevlar 49 fiber composite material. By using Ansys/Lsdyna software, the ballistic limit velocity of this armor has been obtained and the Heterington equation (optimum thickness of layers) has been verified for constant thickness of the armor. In this research, mechanical properties of Kevlar 49 under different strain rates are utilized and showed that consideration of the strain rate is very important for the simulation of penetration process. Results from the model have confirmed the validity of the Chocron–Galvez analytical model. Moreover, the projectile velocity prediction, especially at high velocity, shows a good agreement with numerical simulations. Finally, normal and oblique impacts of projectile to armor have been simulated and compared. The results show that the ballistic limit velocity of armor increases under oblique impact conditions.

[1]  R. L. Woodward,et al.  A simple one-dimensional approach to modelling ceramic composite armour defeat , 1990 .

[2]  N. K. Naik,et al.  Composite structures under ballistic impact , 2004 .

[3]  H. Wen,et al.  Predicting the penetration and perforation of FRP laminates struck normally by projectiles with different nose shapes , 2000 .

[4]  Kamran Behdinan,et al.  Numerical simulation of normal and oblique ballistic impact on ceramic composite armours , 2004 .

[5]  Jack C. Smith,et al.  Stress-Strain Relationships in Yarns Subjected to Rapid Impact Loading , 1961 .

[6]  T.H.G. Megson,et al.  Aircraft structures for engineering students , 1972 .

[7]  Gabi Ben-Dor,et al.  Optimal nose geometry of the impactor against FRP laminates , 2002 .

[8]  Yang Wang,et al.  Experimental and theoretical study on the strain rate and temperature dependence of mechanical behaviour of Kevlar fibre , 1999 .

[9]  V. Sánchez-Gálvez,et al.  A new analytical model to simulate impact onto ceramic/composite armors , 1998 .

[10]  A. Tate,et al.  A theory for the deceleration of long rods after impact , 1967 .

[11]  J. G. Hetherington,et al.  The optimization of two component composite armours , 1992 .

[12]  Vicente Sánchez-Gálvez,et al.  A Simple Analytical Model to Simulate Textile Fabric Ballistic Impact Behavior , 1997 .

[13]  A. L. Florence,et al.  INTERACTION OF PROJECTILES AND COMPOSITE ARMOR. PART II , 1969 .

[14]  V. P. Alekseevskii.  Penetration of a rod into a target at high velocity , 1966 .

[15]  W. Goldsmith,et al.  Penetration of laminated Kevlar by projectiles. I : Experimental investigation , 1992 .