关键词: 本构模型, 多孔材料, 金属橡胶, 曲梁

Abstract: According to the main deformation features of metal rubber material microstructure, the configuration and contact mode of wire spiral coil are analyzed. The single-turn spiral coil microstructure unit is put forward which is based on curved cantilever beam of variable length. Combining contact action model, a constitutive model is established for metal rubber material subjected to compression load. It includes the basic structure parameters which are metal wire diameter, elastic modulus, spiral coil diameter, material relative density and so on. It is easy to explain the physical nature of mechanical characteristics of metal rubber material. Finally, a comparison is made between theoretical results and experimental results for the cylindrical and rectangular metal rubber specimens. The result shows that the theoretic calculation is consistent with the experimental data. This model is valuable for the analysis of the mechanical behaviors of metal rubber material in loading and unloading phases. It provides theoretical support for further studying mechanical characteristics of metal rubber material and guiding design of metal rubber products.

Key words: Constitutive model, Curved beam, Metal rubber, Porous material