Anisotropic failure criterion for soils based on equivalent stress tensor

Dong, Tian; Kong, Liang; Zhe, Mei; Zheng, Yun

doi:10.1016/j.sandf.2019.02.001

Cited by 7 publications

(2 citation statements)

References 44 publications

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“…The soil resistivity structure characteristic index can effectively reflect the soil anisotropy, with the anisotropy coefficient closely related to the soil particle orientation during the consolidation compression 31,32 , and the relationship between the anisotropy and structure factors is given by…”

Section: Methodsmentioning

confidence: 99%

A resistivity-based experimental compaction model for Yunnan laterite

Peng

Zhao

et al. 2023

Preprint

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Soil resistivity can effectively reflect the variation in structural characteristics of soils. The changes in soil resistivity can indirectly represent the degree of soil compaction, which is of great significance for the rapid evaluation of soil compaction. Yunnan laterite, in China, has widely been used as a building material in foundations, roadbeds, and dams due to its high strength and low compression. In this work, we tested the vertical and lateral resistivity of laterite during consolidation compression through an improved consolidation compression resistivity tester to discuss the variations in resistivity structural characteristic parameters (structural factor, shape factor, and anisotropy coefficient). A comprehensive index of resistivity structure characteristics was proposed to create a compactness evaluation model of laterite. The results showed that the vertical resistivity, lateral resistivity, average structural factor, and average shape factor of laterite gradually increased with continuous multi-stage vertical loading; however, the anisotropy coefficient decreased first, and then slowly increased to a stable state. The comprehensive index of resistivity structure characteristics could indirectly reflect the water content and pore content of the laterite, and the lateral resistivity was predicted from the vertical resistivity. Considering the influence of saturation and porosity on the resistivity structure characteristics, the evaluation model of compaction for laterite was finally established based on resistivity characteristics and this model had high accuracy, with small model verification error and good applicability. The proposed prediction model could serve as a theoretical reference for the application of the high-density electrical method in the convenient detection of compaction for laterite rolling engineering.

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Section: Methodsmentioning

confidence: 99%

A resistivity-based experimental compaction model for Yunnan laterite

Peng

Zhao

et al. 2023

Preprint

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“…Anisotropy is affected by stress state, stress history and stress path, especially by intermediate principal stress σ 2 or intermediate principal stress coefficient b, which increases the difficulty of exploring its mechanisms. To characterize the effect of σ 2 on the soil mechanical behaviour, many scholars have conducted numerous true-triaxial tests 2,3 . Rodriguez 4 studied the effects of cross-anisotropy on fine Nevada sand.…”

mentioning

confidence: 99%

Verification of a novel stress path method by true-triaxial test

Ma,

Li,

2024

Sci Rep

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To verify the novel method of achieving a true-triaxial stress path with the pseudo-triaxial apparatus, a series of drained and undrained tests were carried out for the identical scheme with pseudo-triaxial apparatus and true-triaxial apparatus respectively. The differences between the two types of tests were quantified. The results show that the novel method effectively achieved the true-triaxial stress path by controlling the loading ratio of the pseudo-triaxial apparatus. The relationships of q − ε1 and η − εs measured by the two apparatuses had a higher similarity which decreases slightly with the b increase. When 0 ≤ b < 0.5, the slope of the critical state line measured by both apparatuses was almost identical. When 0.5 ≤ b ≤ 1, the slope of the critical state line measured by the novel method was slightly lower, but the biggest change was within 10% compared with the two Mohr–Coulomb criteria, the peak strength measured by the two apparatuses was distributed near the criteria, indicating the feasibility and rationality of the novel method. The tests show that the novel method greatly enriches the test range of pseudo-triaxial apparatus, which not only simplifies the process of soil 3D testing but also reduces the test cost.

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