金属橡胶材料孔隙结构特性参数

Pore structure characteristic parameters of metal rubber material

通过对金属橡胶材料微观孔隙结构进行合理的简化,以毛细管模型为基础,根据相关的流体力学公式,采用理论分析与实验验证相结合的方法,对金属橡胶材料的孔隙度、比表面积、平均孔径及最大孔径等参数进行研究,推导出其相应的理论计算公式,并通过压汞实验法对理论计算公式进行验证。结果表明:金属橡胶比表面积仅与其孔隙度和丝线直径有关,比表面积随着孔隙度增加线性降低,且与丝线直径成反比关系。平均孔径是孔隙度和丝线直径的函数,随着孔隙度增加,平均孔径增大,丝线直径与平均孔径呈线性递增关系。金属橡胶最大孔径随着孔隙度增大呈非线性增大,丝线直径与最大孔径呈线性递增关系,其最大孔径不受其材料厚度影响。

According to a reasonable simplification of microscopic pore structure, the metal rubber pore structure parameters including material porosity, specific surface area, average pore diameter and the maximum pore size were systematically stud-ied by combining theoretical analysis with experimental verification based on capillary model and relevant hydrodynamic equa- tions. The theoretical formulas of the parameters were deduced and verified by mercury experiments. The results indicate that the specific surface area of metal rubber relates to porosity and thread diameter. It linearly decreases with the porosity in- creasing, and has an inverse relationship with thread diameter. The average pore size is a function of porosity and thread di-ameter. It increases with the porosity increasing, and has an increasing linear relationship with thread diameter. The maxi-mum pore size nonlinearly increases with the porosity increasing and also hnearly increases with the thread diameter increas-ing, but has nothing to do with the thickness of the material.