Research On Bio-inspired Composite Materials With Sandwich Structure

Some biological materials in nature possess good matching and adaptability between property and structure. For example, the microcosmic structure of seashell and pearl presents folding layer shape, which leads to the perfect cooperation of tenacity and strength on the whole, even if the main parts of these kinds of materials are very big for brittleness. The existence of organic layers in the main body and the terrace of microstructure make the overall material has effective energy wastage channel. This offers theoretical foundation for material design to present the layer form structure, which has excellent properties, especially the damping property.According to the goals of composite design and the properties of constituent materials, The author choose thermoplastic resin, glass fiber and aluminium alloy-2A12 with high property as constituent materials, and studied the moulding ability of the composite materials using laminating solidified method. Simultaneously, the resin layer is reinforced by glass fiber with fabric structure to get high mechanical property. In order to reach better compound effect, as for the Aluminium alloy, the author choose economic reasonable surface pretreatment means to increase the roughness and the activity of the surface. In addition, the surface of fiber is pretreated by silane coupling agent. On the base of above, the author selected the strict technology parameter to fabricate fold layer material and studied the interface combination condition mainly through microscopical observation and the V shape method of bend test. In the aspect of property of materials, considering the application of the materials in the parts that work under the dynamic environment, the author analyzed the damping property of material.