Experimental and Numerical Investigation on the Deviation of High Velocity Blunt Projectile after Impact on the Perforated Plate

In this paper, the experimental, numerical and semi-analytical study of the deflection of a blunt projectile after hitting the perforated plate has been done. In this regard, for experimental study, AISI 52100 steel projectiles and 1045 AISI perforated plates with 3 hole diameters of 5, 7 and 9 mm have been used, and for numerical modeling, Abacus finite element software has been used. Then, after comparing the numerical and experimental results and confirming the accuracy of the presented numerical model, according to the laboratory limitations, the projectile impact is numerically evaluated with different overlap, and 3 different projectile velocities. And 40 type of impacting modes are designed and modeled. According to the obtained data, the use of optimization algorithm based on the teaching-learning, which is an evolutionary optimization algorithm, and coding in MATLAB software, semi-analytical relations to obtain the rate of projectile deviation after Impact on the perforated plate for each value of hole diameter, projectile diameter, projectile velocity and the amount of overlap is obtained. Finally, a comparison is made between the experimental, numerical and equation results. And this indicates a good match between the results.