This work presents a numerical simulation of ballistic penetration and high velocity impact behavior of plain and reinforced concrete slabs. In this paper, we focus on the comparison of the performance of the plain and reinforced concrete slabs of unconfined compressive strength 41 MPa under ballistic impact. The concrete slab has dimensions of 675 mm × 675 mm × 200 mm, and is meshed with 8-node hexahedron solid elements in the impact and outer zones. The ogive-nosed projectile is considered as rigid element that has a mass of 0.386 kg and a length of 152 mm. The applied velocities vary between 540 and 731 m/s. 6 mm of steel reinforcement bars were used in the reinforced concrete slabs. The constitutive material modeling of the concrete and steel reinforcement bars was performed using the Johnson-Holmquist-2 damage and the Johnson-Cook plasticity material models, respectively. The analysis was conducted using the commercial finite element package Abaqus/Explicit. Damage diameters and residual velocities obtained by the numerical model were compared with the experimental results and effect of steel reinforcement and projectile diameter were studies. The validation showed good agreement between the numerical and experimental results. The added steel reinforcements to the concrete samples were found efficient in terms of ballistic resistance comparing to the plain concrete sample.

中文翻译：

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高速冲击下普通和钢筋混凝土板的弹道性能

这项工作提出了一个数值模拟，模拟了普通和钢筋混凝土板的弹道穿透力和高速冲击行为。在本文中，我们重点比较弹道冲击下无限制抗压强度41 MPa的普通板和钢筋混凝土板的性能。混凝土板的尺寸为675 mm×675 mm×200 mm，并在冲击区和外部区与8节点六面体实体单元啮合。带齿鼻的弹丸被认为是质量为0.386千克，长度为152毫米的刚性元件。施加的速度在540和731 m / s之间变化。在钢筋混凝土楼板中使用了6毫米的钢筋。分别使用Johnson-Holmquist-2损伤模型和Johnson-Cook可塑性材料模型对混凝土和钢筋的本构材料进行建模。使用商业有限元软件包Abaqus / Explicit进行分析。将数值模型得到的损伤直径和残余速度与实验结果进行了比较，研究了钢筋和弹丸直径的影响。验证表明，数值结果与实验结果吻合良好。与普通混凝土样品相比，发现在混凝土样品中添加的钢筋对防弹性能有效。将数值模型得到的损伤直径和残余速度与实验结果进行了比较，研究了钢筋和弹丸直径的影响。验证表明，数值结果与实验结果吻合良好。与普通混凝土样品相比，发现在混凝土样品中添加的钢筋对防弹性能有效。将数值模型获得的损伤直径和残余速度与实验结果进行了比较，并研究了钢筋和弹丸直径的影响。验证表明，数值结果与实验结果吻合良好。发现与普通混凝土样品相比，向混凝土样品中添加的钢筋对防弹性能有效。