June 21, 2024
Mahdi Kazemi

Mahdi Kazemi

Academic rank: Associate Professor
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Education: Ph.D in eng
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Faculty: Technical Engineering

Research

Title An Empirical Study on Ballistic Resistance of Sandwich Targets with Aluminum facesheets and Composite Core
Type Article
Keywords
ballistic resistance, foam, sandwich structures, composite core
Journal Latin American Journal of Solids and Structures
Researchers Mahdi Kazemi

Abstract

This study attempted to examine the ballistic resistance of sandwich structures with aluminum facesheets, polyurethane core and polyu-rethane foam reinforced with aluminum pins. The main focus was on the effect of variations in density of core foam and the effect of adding different percentages of aluminum pins on energy absorp-tion and ballistic resistance of sandwich structures under the im-pact of blunt and conical nose projectiles at high velocities (170 to 260 m/s). The results firstly demonstrated that any increase in the density of foam led to greater energy absorption. Secondly, the ballistic limit of sandwich structures with composite core was more than the foam core by 18 percent. Thirdly, the use of aluminum pins not only enhanced core resistance, but also altered the shape of damage and energy absorption in the rear facesheet. Finally, the ballistic limit of blunt projectile was greater than that of conical nose projectile.