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Nonlinear elasticity of composite materials

机译:复合材料的非线性弹性

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摘要

We investigate the elastic properties of model composites, consisting in a dispersion of nonlinear (spherical or cylindrical) inhomogeneities into a linear solid matrix. Both phases are considered isotropic. Under the simplifying hypotheses of small deformation for the material body and of small volume fraction of the embedded phase, we develop a homogenization procedure based on the Eshelby theory, aimed at describing nonlinear features. We obtain the bulk and shear moduli and Landau coefficients of the overall material in terms of the elastic behavior of the constituents and of their volume fractions. The mixing laws for the nonlinear properties describe a complex scenario where possible strong amplifications of the nonlinearities may arise in some given conditions.
机译:我们研究了模型复合材料的弹性特性,包括将非线性(球形或圆柱形)不均匀性分散到线性固体基质中。两相均被视为各向同性。在简化的假设下,对材料主体进行较小的变形并且对嵌入相进行较小的体积分数,我们基于Eshelby理论开发了均化程序,旨在描述非线性特征。我们根据成分的弹性行为及其体积分数获得了整体材料的体积模量和剪切模量以及Landau系数。非线性特性的混合定律描述了一个复杂的情况,在某些给定条件下,可能会强烈增强非线性。

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