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

作者：Jiang Tao^*; Xu Weiya; Shao Jianfu

来源：Rock Mechanics and Rock Engineering, 2015, 48(2): 417-426.

DOI：10.1007/s00603-014-0581-1

• Multiscale mechanics
• Heterogeneous
• Homogenization
• Geomaterials
• Clayey rocks
• FFT

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.

• 出版日期2015-3
• 单位河海大学