压缩比对金属橡胶结构和压缩力学性能影响

加工了具有相同尺寸和质量的多个金属橡胶,而各金属橡胶对应不同高度的毛坯,引入"压缩比"概念,即毛坯高度和模压后金属橡胶成品高度之比,分析压缩比对金属橡胶结构和力学特性的影响.准静态试验结果表明:压缩比会显著的影响金属橡胶的表观结构以及各向异性力学特性,压缩比较大,到达5~6时,金属橡胶表观的螺旋丝呈现有序的竖立堆积状,同时成型方向刚度偏小;而压缩为2时,成型方向刚度很大,非成型方向刚度相比于其余压缩比试件明显偏小.试验结果表明:在金属橡胶的加工和设计过程中,需要考虑压缩比对性能的影响. 

Influence of compression ratio on microstructure and mechanical behavior of metal rubber

Metal rubber specimens of the same size and mass were manufactured separately with different roughcast heights, and the compression ratio was defined as the ratio of the roughcast height to the metal rubber height. So these different compression ratio specimens were analyzed and then subjected to compression loading in quasi-static regime. The results exhibited that the compression ratio significantly influenced the metal rubber apparent structure and the anisotropy properties along molding and non-molding directions. When the compression ratio was 5 to 6, there were more vertical stacking helix wires in the metal rubber specimens, with a relative small stiffness along the molding direction. When the compression ratio was about 2, the metal rubber specimens exhibited a much bigger stiffness along the molding direction, but an obvious smaller stiffness along the non-molding direction than other specimens. These results indicated that the compression ratio was an important impact factor for the metal rubber behavior and should be well considered during manufacturing and design process.