Concrete is a material frequently used in protective structures exposed to extreme loading. In this study, the ballistic perforation resistance of 50 mm thick plain concrete slabs impacted by 20 mm diameter ogive-nose steel projectiles is investigated both experimentally and numerically. Three types of commercially produced concrete with nominal unconfined compressive strengths of 35, 75 and 110 MPa were used to cast material test specimens and slabs. After curing, ballistic impact tests were carried out in a compressed gas gun facility to determine the ballistic limit curve and velocity for each concrete type. Alongside the impact tests, material tests were conducted to assess the mechanical properties of the materials. Finite element models using input from the material tests were established in LS-DYNA. Here, the constitutive behaviour of the three concrete types was predicted by a modified version of the Holmquist-Johnson-Cook (MHJC) model from the literature. Numerical simulations of the ballistic impact tests were finally carried out and the results were found to be in good agreement with the experimental data. The main objective of the study is to reveal the accuracy of the MHJC model in predicting the ballistic perforation resistance of concrete slabs impacted by ogive-nose steel projectiles using standard material tests and two-dimensional digital image correlation to calibrate the constitutive relation.

混凝土是一种经常用于承受极端载荷的保护结构的材料。在这项研究中，通过实验和数值研究了 50 毫米厚素混凝土板受到 20 毫米直径的拱形钢弹丸冲击的抗冲击性。使用标称无侧限抗压强度为 35、75 和 110 MPa 的三种商业生产的混凝土来浇注材料试样和板坯。固化后，在压缩气枪设备中进行弹道冲击试验，以确定每种混凝土类型的弹道极限曲线和速度。除了冲击试验外，还进行了材料试验以评估材料的机械性能。在 LS-DYNA 中建立了使用材料测试输入的有限元模型。这里，三种混凝土类型的本构行为由文献中的 Holmquist-Johnson-Cook (MHJC) 模型的修改版本预测。最后对弹道冲击试验进行了数值模拟，结果与实验数据吻合良好。该研究的主要目的是揭示 MHJC 模型在使用标准材料测试和二维数字图像相关性校准本构关系来预测受卵形钢弹丸撞击的混凝土板的防弹穿孔阻力的准确性。最后对弹道冲击试验进行了数值模拟，结果与实验数据吻合良好。该研究的主要目的是揭示 MHJC 模型在使用标准材料测试和二维数字图像相关性校准本构关系来预测受卵形钢弹丸撞击的混凝土板的防弹穿孔阻力的准确性。最后对弹道冲击试验进行了数值模拟，结果与实验数据吻合良好。该研究的主要目的是揭示 MHJC 模型在使用标准材料测试和二维数字图像相关性校准本构关系来预测受卵形钢弹丸撞击的混凝土板的防弹穿孔阻力的准确性。