This study presents the experimental and numerical investigation of the response of hemispherical sandwich shell structure having hexagonal honeycomb core against ogive nosed projectile impact. Aluminum AA-1100 was considered for the front and rear face sheet of 200 and 160 mm diameter whereas AA-3003H19 was used for the honeycomb core of 3.2 mm cell size, 0.05 mm cell wall thickness and 20 mm core thickness. The cylindrical ogive nosed projectile having diameter 19 mm, mass 52.5 g and length 50.8 mm was hit at the crown of the hemispherical sandwich shell structure. The experiments were carried out through a pneumatic gun whereas for numerical simulations, 3D finite element code Abaqus explicit solver was used. The ballistic resistance, failure mechanism and the energy absorption of the sandwich shell structure was investigated thoroughly through experimentation and numerical simulations and found close to each other. Moreover, the parametric study was performed through numerical simulations to study the influence of face sheet thickness (0.7, 1, 1.5 and 2 mm), cell wall thickness (0.03, 0.05, 0.07 and 0.09 mm) and cell size (3.2, 5.0, 7.0 and 9.0 mm) of the honeycomb core on the ballistic response and energy absorption. Against ogive nosed projectile, face sheets failed in radial stretching with petal formation and the core failed in crushing. Also, the face sheet thickness had a dominant effect on the ballistic limit and the energy absorption of the hemispherical sandwich shell structure. Moreover by increasing core stiffness (by using thick cell wall and small cell size) enhance energy absorption capacity of the sandwich structure.

这项研究提出了具有六角形蜂窝芯的半球形夹心壳结构对尖头弹丸冲击响应的实验和数值研究。铝制AA-1100用于直径200和160毫米的前面板和后面板，而AA-3003H19用于蜂窝尺寸为3.2毫米，孔壁厚度为0.05毫米，芯厚度为20毫米的蜂窝状芯材。在半球形夹心壳结构的顶部击中了直径为19 mm，质量为52.5 g，长度为50.8 mm的圆柱状带鼻尖的射弹。实验是通过气枪进行的，而对于数值模拟，则使用3D有限元代码Abaqus显式求解器。弹道阻力 通过实验和数值模拟对夹层结构的破坏机理和能量吸收进行了深入研究，发现它们彼此接近。此外，通过数值模拟进行了参数研究，以研究面板厚度（0.7、1、1.5和2 mm），孔壁厚度（0.03、0.05、0.07和0.09 mm）和孔尺寸（3.2、5.0， 7.0和9.0 mm）的蜂窝芯对弹道反应和能量吸收。面对尖鼻射弹，面板无法径向伸展并形成花瓣，核心无法破碎。而且，面板厚度对半球形夹层壳结构的弹道极限和能量吸收起主要作用。