This study investigates a kind of masonry consisting of clay-fired brick (f_c = 10 MPa; $\rho =1.38\text{g}/{\text{cm}}^3$) and mortar (f_c = 10 MPa; $\rho =1.8\text{g}/{\text{cm}}^3$). Clay-fired brick masonry connotes a traditional construction material of old architecture and public buildings. We carried out penetration experiments in which four clay-fired brick walls employing two different patterns were subjected to impact from small high-speed projectile, i.e. 12.7 mm armor-piercing explosive incendiary projectile and material tests in which the static and dynamic compressive strengths of clay-fired brick and mortar were determined by quasi-static and SHPB (Split Hopkinson Pressure Bar) tests. The experimental data include hit and exit velocities, damage configuration of clay brick masonry and mechanical properties of material at low and high strain rates, though which influence of thickness and bonding patterns of wall on kinetic loss of bullet, the damage patterns of masonry observed experimentally and dynamic increase of material strengths are analyzed. To keep minimum boundary inconsistency with reality, full 3D detailed finite element model consisting of two different material is established. Sharing common nodes and employing automatic tiebreak contact are combined to reduce computational time usage of large-scale model. For description of clay-fired brick and mortar Riedel–Hiermaier–Thoma (RHT) material model is employed. Material parameter set is derived based on experimental data, available literature and engineering assumptions. The numerical simulations study the mesh resolution dependency of material model, reproduce the crucial phenomena of masonry in experiment acceptably and offer more time-resolved insight into motion of bullet in the process of penetration. The feasibility of means of constructing finite element model and applying RHT model to the masonry herein and analogous constructions is explored through numerical investigation.

本研究调查了一种由粘土烧制砖组成的砌体（f _c  = 10 MPa；$\rho =1.38\text{G}/{\text{厘米}}^3$) 和砂浆 ( f _c  = 10 MPa;$\rho =1.8\text{G}/{\text{厘米}}^3$）。粘土砖砌体意味着旧建筑和公共建筑的传统建筑材料。我们进行了穿透实验，其中采用两种不同模式的四个粘土砖墙受到小型高速弹丸的撞击，即 12.7 毫米穿甲爆炸燃烧弹和材料测试，其中粘土的静态和动态压缩强度- 烧制砖和砂浆通过准静态和 SHPB（分裂霍普金森压力棒）测试确定。实验数据包括撞击和退出速度、粘土砖砌体的损伤配置和材料在低应变率和高应变率下的力学性能，尽管壁厚和结合模式对子弹动力学损失的影响，分析了实验观察到的砌体损伤模式和材料强度的动态增加。为了保持最小边界与现实的不一致，建立了由两种不同材料组成的全 3D 详细有限元模型。共享公共节点和采用自动平局联系相结合，以减少大规模模型的计算时间使用。对于粘土烧制砖和砂浆的描述，采用 Riedel-Hiermaier-Thoma (RHT) 材料模型。材料参数集是根据实验数据、可用文献和工程假设得出的。数值模拟研究了材料模型的网格分辨率依赖性，在实验中重现了砌体的关键现象，并提供了对穿透过程中子弹运动的更多时间分辨洞察力。