Numerical prediction of projectile residual velocity after penetration of reinforced concrete with different reinforcing bar arrangements

摘要

Projectile penetration of reinforced concrete structures has enormous significance because innplain concrete only the compressive strength offers resistance to penetration and projectilenresidual velocity. It is of great interest to observe how the amount of reinforcement can greatlyninfluence the penetration process and projectile residual velocity. In this paper, numericalnsimulations on projectile penetration of medium strength reinforced concrete were performednusing commercial hydrocode AUTODYN-3D. A combined Lagrange, meshless and beam solvernmethod was used for this kind of problem. For validation of our numerical scheme, simulationnresults were first compared with residual velocity and damage given by Hanchak et al. Based onnthis numerical scheme, the influence of reinforcement on projectile residual velocity wasninvestigated. The analysis shows that the residual velocity of projectile decreases with thenincrease in reinforcement and, on the other hand, ballistic limit increases. Finally, the obliquenimpact was also studied to find the ricochet angle for different impact velocities.