Study on Thermomechanical Properties of Metal-rubber Disordered Lattice Interpenetrating Structures
Metal rubber is an elastic porous pure metal material with a complex and disordered internal mesh interpenetration structure,which is difficult to describe accurately by general methods,which limits its controllable applications in high temperature environments.To this end,a finite element model of metal rubber is constructed by virtual preparation technology that integrates the material properties,wire dimensions and process parameters of metal rubber.On this basis,the dynamic theoretical formulas for the heat conduction of metal wire microelements inside metal rubber is derived and related finite element analysis is carried out.The results show that when only thermal load is present,the metal rubber is mainly realized by continuous metal wires for heat transfer and heat exchange through interfacial contact,and the temperature field is distributed in a gradient along the forming direction.In addition,due to the expansion of the material,its macroscopic size increases,but its thermal expansion coefficient is smaller than that of the solid material under the action of the external constraint and pore containment mechanism.When thermal-force loading is also present,the metal rubber shows good structural stability and heat resistance.The thermomechanical properties of the material were tested by high-temperature quasi-static compression test,it is verified that the established finite element model can effectively reflect and predict the complex thermomechanical properties of the metal-rubber material,which provides some theoretical guidance for the application of the material in high-temperature environment.
metal rubberlattice interpenetrating structurevirtual preparationthermomechanical properties
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