Numerical simulation of projectile impact on reinforced concrete structures: a study of slab performance under varying projectile velocities using ANSYS

This research paper conducts a comprehensive investigation into the behavior of reinforced concrete slabs when exposed to varying velocities of projectile impacts. The study delves into the intricate dynamics of such interactions, utilising advanced numerical simulations with ANSYS software to enhance our understanding of the resulting effects. The paper meticulously explores the localized damages caused by projectile impacts, encompassing spalling, scabbing, punching shear failures, penetration, and perforation. Employing the Holmquist-Johnson–Cook material model adds depth to the analysis, enabling a closer approximation of real-world scenarios. The numerical investigation section focuses on creating models that replicate projectile impact on reinforced concrete slabs, thereby shedding light on internal stresses and deformations arising from such events. Through the examination of various projectile velocities and geometries, the research provides valuable insights into how these factors influence the structural response. A standardized reinforced concrete slab with a thickness of 200 mm is utilized, accompanied by a specialized ogive-nosed Steel 4340 projectile. Additionally, empirical formulas are employed to calculate crucial penetration, perforation, and scabbing ratios, further enriching the comprehension of impact behavior. The paper’s parametric studies assess the impact of reinforcement spacing, diameter, and layers on the performance of the slab under projectile impact. A critical velocity of 313 m/s is identified as a pivotal threshold for full penetration, guiding the evaluation of different reinforcement configurations. This study significantly contributes to the optimization of design guidelines and protective measures for reinforced concrete structures facing the challenges of projectile impacts.