A Theoretical Model and Experimental Investigation of a Nonlinear Constitutive Equation for Elastic Porous Metal Rubbers

Starting from the theory of porous materials, the nonlinear theory of dry friction, and the model of a bent slender beam, a nonlinear constitutive equation for elastic porous metal rubbers is constructed. Static compressive experiments were carried out on hollow cylinders of such a rubber, from which relations between all coefficients of the constitutive equation and the material density were determined. Based on the data obtained, the constitutive equation of the material was predicted successfully. The effect of density of the metal rubber on its stiffness and on the nonlinear constitutive equation was revealed by experiments.__________Russian translation published in Mekhanika Kompozitnykh Materialov, Vol. 41, No. 4, pp. 449–460, July–August, 2005.  

Research on factors influencing the mechanical properties of metallic rubber

Starting from the theory of cellular solids, the nonlinear theory of dry friction, and the model of a bent slender beam, a nonlinear constitutive equation for a metallic rubber is constructed. The effect of density and shape factor on the mechanical properties of the metallic rubber is studied in the cases where varies only one of the parameters or both vary simultaneously. Static experiments were carried out in every case, and based on the results found, relations between the parameters and the corresponding nonlinear constitutive equation are constructed. If the density and shape factor of a metallic rubber are known, the coefficients of the equation can be obtained, and thus the constitutive equation itself of the rubber can be predicted.