论文标题
具有无力平面的分层材料的非弹性均质化框架
An Inelastic Homogenization Framework for Layered Materials with Planes of Weakness
论文作者
论文摘要
许多地质材料具有复合结构，其中宏观机械行为取决于单个成分的特性，形状和异质分布。特别是，沉积岩通常表现出分层的微观结构，其不同的床上用品平面也可以形成无力的平面。在这项工作中，我们提出了一个用于对非弹性分层介质进行建模的均质化框架。所提出的本构模型允许每一层具有不同的微观定义定律，层分布的明确表示，并在相邻层之间的界面上掺入不完善的键合。对于用于层和接口的特定固定模型，不需要先验假设，提供了重要的建模灵活性。整个框架提供了一种简单且物理动机的方式，将各向异性材料行为定义为分层微观结构的新兴属性。使用三轴和真实三轴实验数据对该模型进行校准，以证明其描述各向异性变形和多种故障模式的能力。
Many geologic materials have a composite structure, in which macroscopic mechanical behavior is determined by the properties, shape, and heterogeneous distribution of individual constituents. In particular, sedimentary rocks commonly exhibit a layered microstructure, with distinct bedding planes that can also form planes of weakness. In this work, we present a homogenization framework for modeling inelastic layered media. The proposed constitutive model allows for distinct micro-constitutive laws for each layer, explicit representation of layer distributions, as well as incorporation of imperfect bonding at the interface between adjacent layers. No a priori assumptions are needed regarding the specific consitutive models used for the layers and interfaces, providing significant modeling flexibility. The overall framework provides a simple and physically-motivated way of defining anisotropic material behavior as an emergent property of the layered microstructure. The model is calibrated using triaxial and true-triaxial experimental data to demonstrate its ability to describe anisotropic deformation and multiple modes of failure.
