Stress Diffusion in Granular Materials: The Role of Anisotropy
Publication: Geo-Congress 2024
ABSTRACT
The potential connection of stress diffusivity to anisotropy is explored. The approach taken in this investigation is empirical. It is postulated that material (microstructural) anisotropy would affect stress distribution given by the diffusion theory in ways analogous to what is observed in elastic anisotropy solutions; that is, it modifies attenuation with depth and lateral distribution in similar ways. A case example of a horizontal layer, with two-dimensional geometry, subjected to a uniform strip load, is analyzed using both stress diffusion and anisotropic elasticity theories, and correlations between the resulting stress fields are observed over a range of stress diffusivity coefficients and anisotropy ratios. A strong empirical relationship is found to relate the two parameters; the diffusivity coefficient increases with increasing anisotropy ratio. Overall, the study confirms that anisotropy is a factor in stress diffusion and contributes to a better understanding of the meaning and assessment of the diffusivity coefficient.
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Information & Authors
Information
Published In
Geo-Congress 2024
Pages: 146 - 156
History
Published online: Feb 22, 2024
ASCE Technical Topics:
- Anisotropy
- Continuum mechanics
- Deformation (mechanics)
- Diffusion
- Diffusion (porous media)
- Elastic analysis
- Engineering materials (by type)
- Engineering mechanics
- Geomechanics
- Geotechnical engineering
- Granular materials
- Materials engineering
- Soil mechanics
- Soil properties
- Solid mechanics
- Stress (by type)
- Stress analysis
- Stress distribution
- Structural analysis
- Structural engineering
- Structural mechanics
- Thermodynamics
- Transport phenomena
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