Abstract: Composite sandwich structures have excellent mechanical properties and are widely used in fields such as aerospace, automobiles, and ships. Three finite element models of composite sandwich structures with different configurations are established, and the damage forms and energy absorption characteristics of the structure under different impact energies are studied. The results show that under the same impact energy, the model two sandwich panel exhibits better impact resistance in terms of damage depth. As the thickness of the sandwich structure increases, the overall stiffness increases, and the peak load that the sandwich panel can withstand increases. From the perspective of energy absorption, when the impact energy is low, the structure with smaller wall thickness actually has better energy absorption effect. However, as the impact energy increases, the larger the wall thickness, the greater the specific energy absorption value, and the better the energy absorption effect.

Key words: Composite sandwich structure; Degree of damage; Load versus time curve; Energy absorption characteristics

摘要： 复合材料夹芯结构具有优越的力学性能，被广泛应用于航空航天、汽车和船舶等领域。 文章建立了三种不同构型的复合材料夹芯结构有限元模型，研究了不同冲击能量下结构的损 伤形式和吸能特性。结果表明，在相同的冲击能量下，模型二夹芯板冲击在损伤深度方面表 现出更优异的抗冲击性能。夹芯结构随着厚度的增加，整体刚度变大，夹芯板所能承受的载 荷峰值越大。从吸能角度来看，当冲击能量低时，壁厚小的结构反而吸能效果更好，但随着 冲击能量的增加，壁厚越大，比吸能数值越大，吸能效果越好。

关键词: 复合材料夹芯结构；损伤程度；载荷-时间曲线；吸能特性