Study On Mechanical Behavior And Application Of Foamed Aluminum/Epoxy Resin Compound Material

Foamed aluminum (FA) is a new-type material developing in recent years. Because of its unique structure characteristics, it has a lot of good functional properties, shows a good applying prospect in many fields and becomes the researching focus in the fields of mechanics and science of material. But because of lots of holes in the foamed aluminum, it,s mechanical properties has lost somewhat. So it becomes a significant to increase its mechanical properties on the basis of keeping its functional properties. This paper processes the foamed aluminum/ epoxy resin compound material (FA/ERCM) by the infiltration method and studies on the mechanical behavior and application of the FA/ERCM. The main contents and conclusions are as following:The FA/ERCM is perpetrated by infiltration ER and ER with nanomotmorillonite into the holes of foamed aluminum.The compressive behavior of the FA/ERCM is studied on by using the method of experiment analysis, FE simulation analysis and theoretical analysis synergistically. It is shown that the properties of FA/ERCM depend on the structure parameters and property parameters of FA and filled material and loading strain rate of force. Compared with FA, the strength and stiffness of the FA/ERCM is increased considerable, especially the ER with nanomotmorillonite. As compressed, FA/ERCM,s micro deformation was a little different from FA. The curve of stress-strain is still fit the three stage as multi-holes material, but at the beginning. Its effective elastic modulus and the plateau stress of the flat stage were increased, the degree of increase varied as the change of property of the filling material.Theσ?εcurves of FA/ERCM have tow stages (elastic stage dynamic compression and yielding stage) only, but haven't the densification stage. Its plateau area was higher and longer than FA,s, especially that of FA/ERCM with nanomotmorillonite. The influence of FA parameters on the compressing mechanical behavior of FA/ERCM is similar to that of FA. The bigger the relative density, the bigger the effective elastic modulus and the plateau stress. The influences of diameter on theσ?εcurve depends on strain rate. It has no influence on static compression but had influence on dynamic compression. As same strain, the compressing plateau stress of FA /ERCM increase with diameter. The higher the strain rate, the more increasing. FE simulation method is a time-saving, energy-saving, low-cost and reliable method to study the mechanical behavior of foamed compound materials.By IPC micromechanics unit cell, the compressing behavior of FA /ERCM is analyzed and established model for the elastic modulus and the frame of elastic-plastic construction. The compressive plateau stresses mathematical model of FA /ERCM are established by the"Mixture Law"and"Synergistic Effect Law"of FA /ERCM. The model established was proved to be correct by experiment result and FE simulation result.We studies the mechanism and influencing factor of the damping of the FA /ERCM and establish the semi-quantitative mathematic model of FA /ERCM, which can explain the damping changing of FA /ERCM rationally. It indicated that embedding with ER especially nanomotmorillonite into FA hole can increase the damping property.By studying on the application of FA /ERCM in the gear-damping ring, we study the priority of the material in the application of noise reduction systematically.we study on the compressing mechanical behavior of the circular tube filled with FA and establish the model of energy-absorption considering the interaction of the cube and filling material. It is shown that the energy-absorption property of the circular tube filled with FA /ERCM is better filled with FA which was better than circular cube .We study the application of FA and FA /ERCM in the automobile bumper. It is shown that the automobile bumper made of circular tube filled with FA especially FA /ERCM is better design,. It is benefit automobile developing into the direction of light weight, small volume, low energy consumption, safety and environment protection. FA /ERCM have greater latent capacity in the field of application of energy-absorption and buffering.