Title: Hard and Soft Projectile Impact Simulation of Prestressed Concrete Panels
Author(s): Seong Ryong Ahn and Thomas H.-K. Kang
Publication: Symposium Paper
Appears on pages(s): 249-260
Keywords: impact resistance, finite element analysis, prestressed concrete, hard projectile, soft projectile.
Impact resistance of concrete panels has been researched since the 19th century. Studies therein primarily
focused on conventionally reinforced concrete and steel fiber-reinforced concrete. Little research on the impact
resistance of prestressed concrete exists. This paper investigated the impact resistance of prestressed concrete panels
subject to hard and soft/hollow projectiles and under an assortment of prestressing levels. Damage mode, velocity
change, impact force, and internal energy were measured and analyzed. A total of twelve finite element analyses,
which considered high strain rate effects, were performed, as well as preliminary analyses with different mesh sizes.
It is observed that level of prestressing tends to improve perforation resistance of concrete panels. Additionally,
large deformation at soft projectiles occurred during impact, consuming the greater internal energy of the projectiles,
unlike hard projectiles. As a result, soft projectiles caused a smaller degree of local failure on the concrete panels
than hard projectiles with the same mass and velocity.