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针对汽车结构的轻量化，探究夹层复合材料的三点弯曲失效行为、载荷-位移特性及能量吸收特性。该夹层结构由2层玻璃纤维增强树脂复合材料面板与1层铝蜂窝芯层构成，研究铝蜂窝边长、壁厚和芯层高度对材料弯曲峰值载荷与能量吸收性能的影响，进而明确材料在铝蜂窝纵向(L)和横向(W)能量吸收特性的差异。研究表明：随着铝蜂窝芯层高度的增加，试样的弯曲峰值载荷和总能量吸收能力均有所提升，芯层高度由5 mm提高到15 mm时，试样沿纵向和横向弯曲峰值载荷分别提高60.55%和88.77%,但芯层过高易引发材料的局部屈曲；铝蜂窝边长减小可提高芯体支撑刚度，增强抗弯性能与能量吸收效率；在相同参数下，纵向试样的能量吸收总量和峰值载荷均优于横向成型试样，其破坏过程表现为更稳定的渐进压溃，而横向试样易发生剪切失效。
Abstract：The lightweight design of automotive structures has been investigated by examining the three-point bending failure behavior, load-displacement characteristics, and energy absorption properties of sandwich composite. The sandwich structure consists of two glass fiber reinforced epoxy composite panels and an aluminum honeycomb core. By studying the effects of aluminum honeycomb side lengths, wall thickness and core thickness on the bending peak load and energy absorption performance of the material were analyzed. Furthermore, the differences in energy absorption characteristics between the longitudinal(L) and transverse(W) directions of the honeycomb were clarified. The study revealed that increasing the aluminum honeycomb core thicknesses enhances both the bending peak load and total energy absorption capacity of the specimens. When the core thicknesses was raised from 5 mm to 15 mm, the peak bending loads in the longitudinal and transverse directions increased by 60.55% and 88.77%, respectively. However, excessively high core thicknesses are prone to induce local buckling. Reducing the aluminum honeycomb side lengths improves the core support stiffness, thereby enhancing both bending resistance and energy absorption efficiency. Under identical parameters, specimens fabricated in the longitudinal exhibited superior total energy absorption and peak load compared to those in the transverse, and its failure process shows a more stable progressive crushing, while the transverse sample is prone to shear failure.
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基本信息:
DOI：
中图分类号:U465.6
引用信息:
[1]刘成伟,高晓平,王曦远,等.以铝蜂窝为夹芯的玻璃纤维增强复合材料夹层结构弯曲性能研究[J].产业用纺织品,2025,43(08):25-34+53.
基金信息:
国家自然科学基金项目(12362012); 内蒙古自治区高校创新科研团队计划(NMGIRT2402); 内蒙古高等学校基础研究计划基金(JY20230103)