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Weighted Effective Medium Approximations For Conductivityrnof Random Composites

机译:电导率随机复合材料的加权有效介质近似

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Effective medium approximations are developed to estimate the conductivity of composite media that are random mixtures of inho-mogeneities of various shapes. The approximations use dilute solution results for inclusions of certain shapes embedded in the effective medium matrix, and incorporate weight parameters to reflect the proportions of the inhomogeneities of various shapes from different component materials in a mixture. Since the approximations are based on the differential scheme, which is realizable by a certain hierarchical model, they never violate the mathematical requirements imposed upon a homogenized property including the bounds. As illustrations, the approximations are used to interpret empirical data on the electrical conductivity of water-saturated sedimentary rocks, and the thermal conductivity of some multiphase dispersions of metallic particles in silicone rubber matrix.
机译:开发了有效的介质近似值来估计复合介质的电导率,该复合介质是各种形状的非均相的随机混合物。该近似使用稀溶液结果来嵌入有效介质矩阵中嵌入的某些形状,并合并权重参数以反映混合物中来自不同成分材料的各种形状的不均匀性的比例。由于近似值是基于微分方案的,该差分方案可以通过某个层次模型实现,因此它们绝不会违反对包括边界在内的均质化属性施加的数学要求。作为说明,这些近似值用于解释有关水饱和沉积岩的电导率以及硅橡胶基质中金属颗粒的某些多相分散体的热导率的经验数据。

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