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Rock Mechanics and Rock Engineering

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01-03-2015 | Original Paper

Multiscale Study of the Nonlinear Behavior of Heterogeneous Clayey Rocks Based on the FFT Method

Authors: Tao Jiang, Weiya Xu, Jianfu Shao

Published in: Rock Mechanics and Rock Engineering | Issue 2/2015

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Abstract

A multiscale model based on the fast Fourier transform (FFT) is applied to study the nonlinear mechanical behavior of Callovo-Oxfordian (COx) argillite, a typical heterogeneous clayey rocks. COx argillite is modeled as a three-phase composite with a clay matrix and two types of mineral inclusions. The macroscopic mechanical behavior of argillite samples with different mineralogical compositions are satisfactorily predicted by unified local constitutive models and material parameters. Moreover, the numerical implementation of the FFT-based nonlinear homogenization is easier than direct homogenization, such as the FEM-based homogenization, because it automatically satisfies the periodic boundary condition.

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Title: Multiscale Study of the Nonlinear Behavior of Heterogeneous Clayey Rocks Based on the FFT Method
Authors: Tao Jiang
Weiya Xu
Jianfu Shao
Publication date: 01-03-2015
Publisher: Springer Vienna
Published in: Rock Mechanics and Rock Engineering / Issue 2/2015
Print ISSN: 0723-2632
Electronic ISSN: 1434-453X
DOI: https://doi.org/10.1007/s00603-014-0581-1

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