论文标题
异质材料中的弹性各向异性
Elastic anisotropy in heterogeneous materials
论文作者
论文摘要
异质材料表现出各向异性，受到诸如单个相性质和微结构构型的因素的影响，这些因素和微结构形成形成了重要的异质性描述。对单晶背景下提出的各向异性指数的综述表明，它们没有说明异质性的描述符，从而限制了其在异质材料中的效用。为了解决这一缺点，这项工作提出了一种新的方法，可以利用其有效的弹性特性来量化异质材料中的弹性各向异性。已经证明了各向异性定量，考虑了两种相复合材料，突出了组成体积分数，次级形状和弹性对比的关键作用在影响各向异性程度中的关键作用。此外，还验证了导致复合材料总体各向同性的特定材料和微结构描述符，并提出了孔隙度和裂纹等缺陷的方法的扩展。提出的结果证明了各向异性定量方法适用于任何异构材料构型的适用性。
Heterogeneous materials exhibit anisotropy which is influenced by factors such as individual phase properties and microstructural configuration that form crucial descriptors of heterogeneity. A review of anisotropy indices proposed in the context of single crystals reveals that they do not account for the descriptors of heterogeneity limiting their utility in heterogeneous materials. To address this shortcoming, this work presents a novel approach to quantify elastic anisotropy in heterogeneous materials utilizing their effective elastic properties. Anisotropy quantification has been demonstrated considering two phase composite materials highlighting the crucial role of constituent volume fractions, secondary phase shape, and elastic contrast in influencing the extent of anisotropy. Additionally, specific material and microstructural descriptors leading to overall isotropy in composite materials are validated and an extension of the approach to account for defects such as porosity and cracks is presented. The presented results demonstrate the applicability of the anisotropy quantification approach to any configuration of heterogeneous materials.
