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- Title
Macro- and micro-scale behavior of inherently anisotropic sands under true triaxial loading paths considering partial drainage conditions.
- Authors
Faraji, Seyedeh Fateme; Zheng, Jun-jie; Wu, Qixin
- Abstract
The actual drainage conditions in situ will be neither perfectly drained or undrained but will be partially drained. In the meantime, granular material behavior is sensitive to the intermediate principal stress ratio b = (σ2−σ3)/(σ1−σ3). While the conventional triaxial behavior of granular material under partial drainage condition has been extensively investigated, true triaxial behavior of granular material under partial drainage condition has not been studied. In this study, a series of DEM simulations are conducted to investigate both the macro- and micro-scale behavior of sand, considering the combined effects of the partial drainage conditions and intermediate principal stress ratios (b = 0, 0.5, and 1.0). The initial fabric anisotropy is integrated into consideration, which is measured through a bedding plane angles α = 0°, 30°, 45°, 60°, and 90°. The second order work criterion is used to detect the occurrence of instability under different loading conditions. During the entire loading process, the internal structure evolutions of the granular assemblies are quantified through a contact-normal-based fabric tensor. The interplay between the external loading and the internal fabric evolution is analyzed in detail, which can provide useful insights into the macro-scale observations.
- Subjects
GRANULAR materials; DRAINAGE; SAND
- Publication
Granular Matter, 2024, Vol 26, Issue 2, p1
- ISSN
1434-5021
- Publication type
Article
- DOI
10.1007/s10035-024-01400-y