Mines, specifically as Anti-Tank (AT) mines are a significant threat for defence vehicles. While approaches such as v-shaped hulls are currently used to deflect the blast products from such threats, such a solution is not always usable when hull standoff is limited. As such the development of a low profile, energy absorbing solution is desirable. One approach that has potential to achieve these requirements are sandwich panels. While sandwich panel cores can be constructed from various materials, one material of particular interest are auxetics. Auxetic are materials that exhibit a negative Poisson’s ratio. This material has potential to be an efficient an impact energy absorber by increasing stiffness at local deformation by gathering mass at the impact location. This study investigates the effectiveness of novel auxetic core infills alongside three other panel types (monolithic, air gap, polymer foam sandwich) against buried charges. 160 grams of PE4 were buried in 100 mm depth and 500 mm stand off the target. Laser and High Speed Video (HSV) system were used to capture the deflection-time profile and load cell sensors were used to record the loading profile received by the panels. Experimental works were compared with numerical model. Explicit model were generated in LSDYNA software as ‘initial impulse mine’ keyword. The result found that the auxetic and foam core panels were effective in reducing peak structural loading and impulse by up to 33% and 34% respectively. Air-filled panels were the most effective to reduce the deflection of the rear of the plate, however variation between capture methods (HSV and Laser system) were reported, while numerical modelling provided comparable plate deflections responses. When normalised against panel weight, the air filled panels were experimentally the most efficient per unit mass system with the auxetics being the least effective.

中文翻译：

---

拉胀夹芯板在 160 克 PE4 爆炸载荷下的试验和数值研究

地雷，特别是反坦克 (AT) 地雷，是防御车辆的重大威胁。虽然目前使用诸如 V 形船体之类的方法来偏转爆炸产物免受此类威胁，但当船体间距有限时，这种解决方案并不总是可用。因此，需要开发低剖面、能量吸收解决方案。一种有潜力实现这些要求的方法是夹层板。虽然夹心板芯可以由各种材料制成，但一种特别令人感兴趣的材料是拉胀材料。拉胀是表现出负泊松比的材料。这种材料有可能成为一种有效的冲击能量吸收器，通过在冲击位置聚集质量来增加局部变形的刚度。本研究调查了新型拉胀芯填充物以及其他三种面板类型（整体式、气隙式、聚合物泡沫夹层）对抗埋设电荷的有效性。160 克 PE4 被埋在 100 毫米深处，距离目标 500 毫米。激光和高速视频 (HSV) 系统用于捕获偏转时间曲线，而称重传感器用于记录面板接收到的负载曲线。实验工作与数值模型进行了比较。显式模型是在 LSDYNA 软件中作为“初始脉冲矿山”关键字生成的。结果发现，拉胀和泡沫芯板分别有效地将峰值结构载荷和冲量降低了 33% 和 34%。充气板是减少板后部挠度的最有效方法，然而，报告了捕获方法（HSV 和激光系统）之间的差异，而数值建模提供了可比较的板偏转响应。当相对于面板重量归一化时，充气面板在实验上是每单位质量最有效的系统，而拉胀效果最差。