The Influence of Single and Double Steel Plate Hardness on Fracture Behavior after Ballistic Impact

  • Helmy Purwanto
    Affiliation

    Department of Mechanical Engineering, Faculty of Engineering, Universitas Wahid Hasyim, 50236 Semarang, Indonesia

  • Rudy Soenoko
    Affiliation

    Department of Mechanical Engineering, Faculty of Engineering, Brawijaya University, 65145 Malang, Indonesia

  • Anindito Purnowidodo
    Affiliation

    Department of Mechanical Engineering, Faculty of Engineering, Brawijaya University, 65145 Malang, Indonesia

  • Agus Suprapto
    Affiliation

    Department of Mechanical Engineering, Faculty of Engineering , University of Merdeka Malang, 65145 Malang, Indonesia

Abstract

This study aims to determine the ballistic characteristics of the two steel plates with different hardness levels and mix in the form of layered in non-permanent constructions. Ballistic testing by caliber 5.56 × 45 mm deformed full metal jacket on a sample plate with each a thickness of 6 mm at a distance of 15 m with a normal angle of attack. The results of ballistic testing on both single plates are they can be pierced by a projectile. While for the layered plate, projectile can only penetrate the front side of the plate. The characteristic of each hole that is formed shows the difference caused by the level of hardness of the plate. On the rear part of the plate, a bulge appears because of an impact from the front side of the plate. In the Soft Plate appear high petals around the hole on the front side with the microstructure deformed on the crater walls. While the hard plate forms small petals on the back side and slightly deformed crater walls. The Soft plate is perforated due to deformation with petaling and fragmentation mechanism, while the hard plate is perforated due to plugging mechanism and adiabatic shear band and cracked.

Keywords: soft steel, hard steel, ballistic, crater
Published online
2020-07-17
How to Cite
Purwanto, H., Soenoko, R., Purnowidodo, A., Suprapto, A. “The Influence of Single and Double Steel Plate Hardness on Fracture Behavior after Ballistic Impact”, Periodica Polytechnica Mechanical Engineering, 64(3), pp. 189-198, 2020. https://doi.org/10.3311/PPme.11780
Section
Articles