Numerical modelling of velocity and impact energy on ballistic behavior of plates

Abstract

In this paper, which includes the numerical and statistical methods, the effect of the initial velocity of the ball and material properties of the plates on the ballistic behavior such as exit velocity and impact energy was analyzed. Calculations for explicit dynamics were implemented via ANSYS commercial software. In calculations, the fixed boundary conditions for all edges of the plates were employed. The sequences of analyses were considered via L9 orthogonal sequence with two evaluator parameters in Taguchi method. Ball velocity and material type with non-linear (NL) properties were chosen as evaluator parameters. Stainless Steel NL, Copper Alloy NL, and Aluminum Alloy NL were chosen to be material types, whereas initial velocities of the ball were selected to be 450 m/s, 475 m/s and 500 m/s. Effect of evaluator parameters and their optimum levels on exit velocity and impact energy was determined by employing analysis of signal to noise (S/N) ratio. The effective evaluator parameters and their presentence contribution ratios were decided by employing analysis of variance (ANOVA). Results of this paper displays that the most effective materials on the exit velocity of the ball were detected as Aluminum Alloy NL, Copper Alloy NL, and Stainless Steel NL, respectively. The most powerful evaluator parameter on impact energy and the exit velocity of the ball were decided to be material type.