Research on Mechanical Performance Parameter of Metal Rubber
Metal Rubber is special materials and used in aerospace, especially under extreme conditions. It has characteristics of strong adaptability, corrosion resistance, radiation resistance and designability. In this paper, we have manufactured Metal Rubber components, and done some research on the influence of previous deformation to Metal Rubber material's structure and performance, its characteristic parameters such as Poisson's ratio, Elastic modulus were studied. Research results are basic but essential for finite element analysis of Metal Rubber materials; these results also play an important role of engineering application.
Dry friction damping characteristics of a metallic rubber isolator under two-dimensional loading processes
The nonlinear material metallic rubber is used widely in engineering, especially in isolation systems. This paper describes the effects of loading processes on dry friction damping performance, which is based on the Masing model and its derivations. First, the primary loading lines of the full hysteresis loop are obtained from single axial experiments. The lines are used to describe the full loop in the process of coordinate transform. Then, two-dimensional perpendicular loading experiments are conducted to investigate the relationship between axial loading and tangential loading. In the experiments, different loading amplitudes in axial and tangential directions are adopted to study their effects on the damping performance. Particular attention is paid to the description of the relationship between relative frictional force and the displacement in its perpendicular direction. In addition, a test rig is designed for the study.
Research on the sound absorption performance of metal rubber material
The sound absorption performance of Metal Rubber materials was investigated theoretically and experimen- tally.The acoustic impedance rate and sound absorption coefficient were derived based on the formula of Metal Rubber material acoustic parameters.The relation of structure constant,compressive modulus and structural parameters was explored experimentally.The research results showed that the specimen of Metal Rubber with the same average porous diameter had the same structure constant.For Metal Rubber material with the same structural parameters,its com- pressive modulus was approximately constant in the certain frequency range.The comparison between the experimental and calculated results of the acoustic parameter of Metal Rubber showed that these two results matched to each other very well,which verified the theoretical and experimental methods.