Numerical Simulation Study On The Effect Of Aggregate On The Target Of Elastic And Plastic Projectile Penetrating Concrete Target

Kinetic energy projectile penetrating concrete target is a widely concerned problem, is important to the projectile and engineering design of protective structure, while the projectile attack defenses often non-positive penetration, related to aggregate projectile characteristics and overload case studies and other projectile deflection is relatively seldom. This paper through theoretical analysis and numerical simulation to analyze the concrete oblique penetration problems, the main contents include:(1) From the meso-level, concrete is regarded as two-phase composites consisting of mortar matrix and aggregate. On the basis of existing research, improved random aggregate program, using ANSYS and MATLAB software to establish threedimensional model of random aggregate of concrete. With a comparison of penetration test of related literature, it is concluded that the calculation results of the model are in good agreement with the experimental results.(2)For the validation of random aggregate in projectile penetration of projectile impact, established equal size and the macroscopic strength in the same concrete homogeneous model, comparison of the projectile penetration trajectory, deflect projectiles and deflection angle, body mass loss. The results show that there were significant differences in the random aggregate model with homogeneous model, and aggregate of penetration has great influence.(3)The influence of aggregate on the oblique penetration of elastic and plastic projectiles is studied in different working conditions. Finite element software is used to establish the projectile penetration model, using the HJC concrete constitutive material model and elastic plastic body model, simulation in different penetration velocity and the target angle, aggregate strength of the effects of kinetic energy projectile oblique penetration into concrete target.