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Compression characteristics, energy absorption, and feasibility evaluation of egg-box panels made of long fibre prepreg sheets

机译：长纤维预浸料板制成的蛋壳板的压缩特性，能量吸收和可行性评估

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摘要

In this study, the feasibility of using long-fibre-reinforced composites for preparing energy-absorbing structures with a complex geometry was verified by comparing the mechanical performance of two types of egg-box panels, fabricated using plain weave fabric composites (WSN3k, SK Chemical, Korea) and a long-fibre prepreg sheet (LFPS, SK Chemical, Korea). Two types of egg-box panels (large and small models) with different dimensions were prepared to determine the influence of the panel size on the collapsing behaviour and energy absorption rate of the panels. The failure modes at each deformation stage were identified through a multiply interrupted compression test. Furthermore, a high-density polyurethane foam was filled in the cavity of the egg-box panels to suppress premature buckling during crushing. The nominal stress–strain relationships of both types of egg-box panels were obtained through a compression test. Thus, the maximum compressive strength, plateau stress, and energy absorption rate of both types of egg-box panels were experimentally determined and compared. Accordingly, a method to apply LFPS in the fabrication of energy-absorbing structures with a complex geometry was suggested.
机译：在该研究中，通过使用普通编织织物复合材料制造的两种类型的蛋壳面板的机械性能来验证使用用于制备具有复杂几何形状的能量吸收结构的能量吸收结构的可行性。使用平原织物复合材料（WSN3K，SK化学，韩国）和长纤维预浸料板（LFP，SK Chemical，Korea）。准备了两种类型的蛋箱面板（大型和小型型号），以确定面板尺寸对面板的折叠行为和能量吸收率的影响。通过多次中断的压缩测试识别每个变形阶段的故障模式。此外，填充高密度聚氨酯泡沫在蛋箱板的腔中填充，以在破碎期间抑制过早弯曲。通过压缩测试获得两种类型的蛋壳面板的标称应力 - 应变关系。因此，通过实验和比较两种类型的蛋壳面板的最大抗压强度，高原应力和能量吸收率。因此，提出了一种在制造具有复杂几何形状的能量吸收结构中施加LFP的方法。

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