Numerical Simulation On Dynamic Response Of Concrete Under Penetration And Explosion

Because of its great current signification and importance in military field, the penetration and perforation of concrete slabs impacted by steel projectiles has been an ongoing topic of interest. In order to predict accurately the responses of concrete materials and structures under dynamic loads, it is important to identify dominant mechanisms of the penetration and perforation and failure modes of concrete.The paper presents an alternative approach wherein the concrete response is modeled by a microcrack based continuum damage description. The two continuum damage model was originally developed to study rock fragmentation. The essential feature of this model is the treatment of the dynamic fracture process as a continuous accrual of damage, where the damage mechanism has been attributed to the microcrack in the medium. Several modifications was made to the original model to increase its versatility.The two modified continuum damage 1model was implemented into the transient dynamic explicit finite element software LS-DYNA3D.The continuum damage model 1 then was used to simulate the concrete target impacted and penetrated by a high velocity rigid projectile. The specific impact configuration of this study follows the experiment series. Comparisons between calculated results and measured data show a good agreement.The continuum damage model 2 was used to simulate the continuum damage of the reinforced concrete plate resisting explosive loading. Comparisons between calculated results and measured data show a good agreement.A more modified model is required for more desirably description of the response, and needed further research in future work.