泡沫铝夹层结构复合材料低速冲击性能

以泡沫铝为夹芯材料,玄武岩纤维(BF)和超高分子量聚乙烯纤维(UHMWPE)复合材料为面板,制备夹层结构复合材料。研究纤维类型、铺层结构和芯材厚度对泡沫铝夹层结构复合材料冲击性能和损伤模式的影响规律,并与铝蜂窝夹层结构复合材料性能进行对比分析。结果表明:BF/泡沫铝夹层结构比UHMWPE/泡沫铝夹层结构具有更大的冲击破坏载荷,但冲击位移和吸收能量较小。BF和UHMWPE两种纤维的分层混杂设计比叠加混杂具有更高的冲击破坏载荷和吸收能量。随着泡沫铝厚度的增加,夹层结构复合材料的冲击破坏载荷降低,破坏吸收能量增大。泡沫铝夹层结构比铝蜂窝夹层结构具有更高的冲击破坏载荷,但冲击破坏吸收能量较小;泡沫铝芯材以冲击部位的碎裂为主要失效形式,铝蜂窝芯材整体压缩破坏明显。

Low Velocity Impact Properties of Aluminum Foam Sandwich Structural Composite

Sandwich structural composites were prepared by aluminum foam as core materials with basalt fiber(BF) and ultra-high molecular weight polyethylene(UHMWPE) fiber composite as faceplate.The effect of factors of different fiber type faceplates,fabric layer design and the thickness of the corematerials on the impact properties and damage mode of aluminum foam sandwich structure was studied.The impact properties were also analyzed to compare with aluminum honeycomb sandwich structure.The results show that BF/aluminum foam sandwich structural composites has bigger impact damage load than UHMWPE/aluminum foam sandwich structure,but less impact displacement and energy absorption.The inter-layer hybrid fabric design of BF and UHMWPE has higher impact load and energy absorption than the overlay hybrid fabric design faceplate sandwich structure.With the increase of the thickness of aluminum foam,the impact load of the sandwich structure decreases,but the energy absorption increases.Aluminum foam sandwich structure has higher impact load than the aluminum honeycomb sandwich structure,but smaller damage energy absorption;the damage mode of aluminum foam core material is mainly the fracture at the impact area,while aluminum honeycomb core has obvious overall compression failure.