The load response, energy absorption, different damage mechanisms and failure modes of sandwich panels subjected to complete perforation by quasi-static indentation and the insights gleaned are presented in this paper. The experimental campaign was carried out on samples made of different type of facesheets: Aluminium, glass fibre-reinforced plastic and metal-composite hybrid (combined aluminium and GFRP) with two different core heights. Reliable numerical models were developed with appropriate constitutive material and damage model for facesheets and honeycomb core to complement the experimental observations. Good agreement between experimental results and numerical predictions in terms of force-displacement response and perforation damage ensure the fidelity of the developed numerical model. Effects of facesheet type, core height, energy absorbed by the constituent layers, damage evolution history are briefly discussed. It was observed that the energy absorption of sandwich panels and peak indentation force resisted by the top and bottom facesheet are strongly dependent on its metal-volume fraction, whilst unaffected with the height of the core. Recommendations for developing computationally efficient numerical models were provided.

本文介绍了通过准静态压痕完全穿孔后的夹芯板的载荷响应，能量吸收，不同的损伤机理和破坏模式，以及获得的见解。实验活动是在由不同类型的面板制成的样品上进行的：铝，玻璃纤维增​​强的塑料和金属复合材料的混合材料（铝和GFRP结合使用）具有两种不同的芯高。针对面板和蜂窝芯开发了具有适当本构材料和损伤模型的可靠数值模型，以补充实验观察结果。在力-位移响应和射孔损伤方面，实验结果与数值预测之间的良好一致性确保了所开发数值模型的保真度。面板类型，芯高，简要讨论了组成层吸收的能量，损伤演化的历史。观察到，夹层板的能量吸收和顶面板和底面板抵抗的最大压痕力很大程度上取决于其金属体积分数，而不受芯的高度的影响。提供了开发有效计算模型的建议。