The sandwich panels are widely used in many industrial applications due to their high mechanical properties. Their core design is most important parameter in enhancing their mechanical strength. Flexibility in the design of the core structure leads to the achievement of high strength and light structures. In this paper, the results of the optimized geometry in the previous work are used to investigate the capability of the core geometry design with different materials. Therefore, using the different materials, the peak enhancement of strength-to-weight ratio in sandwich panels besides core behavior during pressure testing are investigated. To this end, a new lattice core is brought forth as the first level; then, three types of materials including AL3105, glass, and innegra fiber/epoxy composites are used to fabricate the cores, in order to compare the compressive strength and the peak. The Nano-clay cloisite 20A is also utilized in construction of sandwich panels. The result indicates that the AL3105 lattice core has the highest strength-to-weight ratio, while the innegra fiber composite core has the highest toughness. Applying curve studies and the SEM Fig. 13, it is concluded that the addition of Nano-clay to composites leads to an increase in both of the strain and the core strength. Comparing the results of experimental and finite element modeling (FEM) data (in ABAQUS software) represented that there is a suitable compliance between them. Our results with the positional variation in core design can pave way in designing advanced engineered sandwich structures in aerospace, shipping, automotive industries. Therefore, these structures will have wide applications in the field of light structure, heat and fluid transfer, sound and vibration control.

夹芯板由于其高机械性能而广泛应用于许多工业应用。它们的核心设计是增强机械强度的最重要参数。核心结构设计的灵活性可以实现高强度和轻质结构。在本文中，利用前期工作中优化几何形状的结果来研究不同材料的核心几何设计的能力。因此，使用不同的材料，除了压力测试期间的芯材行为之外，还研究了夹芯板强度重量比的峰值增强。为此，提出了新的晶格核心作为第一层；然后，使用AL3105 、玻璃和innegra纤维/环氧树脂复合材料三种材料来制造芯，以比较抗压强度和峰值。纳米粘土 cloisite 20A也可用于夹芯板的构造。结果表明，AL3105晶格芯具有最高的强度重量比，而innegra纤维复合材料芯具有最高的韧性。应用曲线研究和SEM图 13，得出的结论是，在复合材料中添加纳米粘土会导致应变和核心强度的增加。比较实验结果和有限元建模（FEM）数据（在ABAQUS软件中）表明它们之间存在适当的一致性。我们的核心设计位置变化结果可以为航空航天、航运、汽车行业的先进工程夹层结构的设计铺平道路。因此，这些结构将在轻型结构、传热和流体传递、声音和振动控制等领域具有广泛的应用。