| Lightweight porous material has low density, high strength, excellent energy absorption properties, etc., have been increasingly used in many fields of civil and military. In such materials, aluminum foam as a function of the material is a hot topic in recent years, the study, aluminum foam is a kind of aluminum and its alloys as the base material, the structure has a lot of holes, a lightweight, high strength characteristics of porous metallic material having properties including sound absorption, fire-retardant, noise, light, to absorb impact energy, damping, heat, vibration and electromagnetic shielding and other excellent properties, therefore, material in the 21 st century, many workers will its research and analysis as a popular material, and it has been widely used.IPC is a multi-phase composition of the material, within the material, which has a three-dimensional direction of each portion of the continuous component and the topology is the main form of existence. In other words, two-phase materials contain both porosity and microstructure are independent, while all micro-structure in all directions are covered by a two-phase material. Therefore, IPC is a common form of improved composite material, in a macro point of view, the individual components are guaranteed their own fine features. Epoxy is often used as structural damping material, standing for optimum damping properties of the preparation epoxy composites. The polyurethane resin having a large-scale performance adjustable, but the heat generated inside the large, while its poor heat resistance properties and acid properties.Piezoelectric composite damping type damper as an intelligent typical composite material, which is to add the piezoelectric ceramic particles in a polymer matrix, so that average distribution and the matrix which, to the preparation of a new generation has excellent damping effect of damping composites.The contents of this paper is a low viscosity epoxy resin, urethane resin is a polymer matrix, carbon black(CB) as the conductive phase, magnesium niobate lead zirconate titanate(PMg N) is a piezoelectric phase, with glass fiber reinforcement filled with aluminum foam forming a interpenetrating phase composites(IPC) structure of foamed aluminum / piezoelectric phase / resin-based composites. By studying the microscopic surface morphology of each component material properties and resistance to compression of high overload capability, explore different resin matrix, the effects of different phases and enhanced piezoelectric phase content and surface morphology on the mechanical properties of the material, in order to develop a resistance to high overload withstand damping composites still have good after several high impact load energy attenuation characteristics, in order to meet the demand for aerospace sectors such materials.By compression experiments show that aluminum foam / polyurethane foam resin matrix composites representing Al / epoxy composites with higher mechanical properties and deformation capacity, its destructive form of fracture toughness. At the same time, by increasing the content of the ceramic particles(100wt%) and chopped fiber content(2wt%), improving the interfacial properties of the resin matrix and filler between the properties of materials can improve the compression.By exploring experimental device Machete hammer Aluminum Foam / epoxy composites anti high overload capability, we found that pure aluminum foam has excellent energy absorption properties, but its large deformation, unsuitable as an antimultiple high overload cushioning material, while the piezoelectric phase and the presence of reinforcement materials are useful for anti-high overload performance improvements. |
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