Investigation on Mechanical Properties and Equivalent Model of Aluminum Honeycomb Sandwich Panels
Investigation on Mechanical Properties and Equivalent Model of Aluminum Honeycomb Sandwich Panels
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铝蜂窝夹芯板力学性能及等效模型研究
DOI：
10.1007/s11665-018-3771-2
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发表时间：
2018-12-01
影响因子：
2.3
通讯作者：
Xu, Wei
中科院分区：
文献类型：
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作者：
Cai, Liangcai;Zhang, Duoyao;Xu, Wei
本文对不同材料、不同尺寸的铝蜂窝夹芯板进行了正压、弯曲和滚筒剥离试验。这些试验结果不仅准确地揭示了铝蜂窝夹芯板的力学性能与面层和核心层的材料尺寸、核心层的布置方式以及面层和核心层之间的连接方式之间的关系，而且确定了可靠的力学等效模型。试验结果表明，在竖向荷载作用下，铝蜂窝夹芯板的压缩性能主要由芯层决定，而面层主要起到缓解轴向应力和抑制芯层变形的作用。在弯曲试验中，面层是受力的主要部分，而核心层具有支撑、稳定和加强的作用，减缓面层的变形；核心层的布置类型会对弯拉性能产生一定的影响。根据试验结果筛选出等效板模型、蜂窝板模型和夹层板模型，表明夹层板模型能更准确地描述材料的受力性能。对夹层板模型进行了进一步的修正，最终得到了更能准确反映铝蜂窝夹芯板力学性能的等效模型。
In this study, positive-pressure, bending, and drum peel tests were carried out for aluminum honeycomb sandwich panels made of different materials and with different dimensions. The results of these tests not only precisely revealed the relationships between the mechanical properties of aluminum honeycomb sandwich panels and the material dimensions of the face and core layers, the layout mode of the core layer, and the connecting mode between the face layers and core layers, but also determined the reliable mechanical equivalent model. The test results indicate that when the specimen was subjected to the vertical load, the compression properties of aluminum honeycomb sandwich panels were mainly determined by its core layer, while the face layer mainly relieves the axial stress and restrains the deformation of the core layer. In the flexural test, the face layer is the main part subjected to the load, whereas the core layer shows supporting, stabilizing, and strengthening effects, slowing the deformation of the face layer; flexural-tensile properties can be somewhat affected by the layout type of the core layer. The equivalent plate model, honeycomb plate model, and sandwich panel model were screened based on the experimental results, indicating that the sandwich panel model provided a more accurate description. The sandwich panel model was further modified, ultimately resulting in a more effective equivalent model that can accurately reflect the mechanical properties of the aluminum honeycomb sandwich panels.