Herein, an improved dynamic cavity-expansion model for penetration of reinforced-concrete targets is proposed. The circumferential restriction effect derived from reinforcing bars in both the cracked and crushed regions has been considered in the proposed model, and the theoretical solutions for the cavity radial stress in compressible and incompressible reinforced concrete are obtained. Through the analysis of concrete strength and reinforcement ratio, we establish a simplified formula to calculate the penetration resistance of reinforced-concrete targets. Moreover, the calculation method of a direct impact resistance for the projectile on the reinforcing bars is developed, and thus, the engineering model for penetration of reinforced-concrete target is constructed. By comparing with the experimental data and empirical formula, the validity of this new model is further verified.

在此，提出了一种用于钢筋混凝土目标穿透的改进动态空腔膨胀模型。该模型考虑了钢筋在开裂和压溃区域产生的周向约束效应，得到了可压缩和不可压缩钢筋混凝土空腔径向应力的理论解。通过对混凝土强度和配筋率的分析，建立了钢筋混凝土靶材抗贯穿性计算的简化公式。此外，开发了弹丸对钢筋直接冲击阻力的计算方法，从而构建了钢筋混凝土靶材穿透工程模型。通过与实验数据和经验公式的比较，