Determination of peak and ultimate shear strength parameters of compacted clay

Xu, Youwei; Wu, Shengshen; Williams, David J.; Serati, Mehdi

doi:10.1016/j.enggeo.2018.07.001

Cited by 32 publications

(12 citation statements)

References 25 publications

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“…The simulations are compared with experimental results reported in reference 60 which are performed on dry specimens of compacted clay. To calibrate the model parameters, we used the experimental data provided in [60]. Young's modulus and Poisson's ratio were estimated based on the stress-strain curves provided.…”

Section: Plane Strain Compressionmentioning

confidence: 99%

“…Young's modulus and Poisson's ratio were estimated based on the stress-strain curves provided. Table 6 lists the peak and ultimate shear strength parameters for MRM compacted clay tested in [60]. Having these parameters, we first estimate the equivalent Drucker-Prager yield criterion parameters for the triaxial compression corners using…”

Section: Plane Strain Compressionmentioning

confidence: 99%

“…A test with no confining pressure is considered which resembles an unconfined compression (UC) test. The simulations are compared with experimental results reported in reference 60 which are performed on dry specimens of compacted clay.…”

Section: Numerical Examplesmentioning

confidence: 99%

See 2 more Smart Citations

A hardening/softening viscoplastic model for large deformation of soil

Parvaneh

Foster

Chi

2022

Num Anal Meth Geomechanics

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A three-invariant continuum cap plasticity model with viscoplastic features is developed for modeling the large deformation of soil. Multiple failure mechanisms including combined shear and compaction yielding and loss of strength under tension can be captured by this model. The shear yield surface of the model is formulated to be nonlinear and pressure-dependent. The model also features a cap surface that governs inelastic compaction hardening. This cap is formulated as an explicit expression of porosity. The differences in triaxial compression and extension strength are also considered. A set of numerical examples are carried out, including triaxial compression and compression-shear tests, in order to examine the model under confined loading conditions, and observe the formation of shear bands.

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Section: Plane Strain Compressionmentioning

confidence: 99%

Section: Plane Strain Compressionmentioning

confidence: 99%

See 1 more Smart Citation

A hardening/softening viscoplastic model for large deformation of soil

Parvaneh

Foster

Chi

2022

Num Anal Meth Geomechanics

View full text Add to dashboard Cite

show abstract

“…Presently, the construction industry is the biggest consumer of natural resources in the world (Bogas et al, 2015). It is a common practice to crush and screen the rock formations to different specifications, producing aggregates suitable for different construction applications (Xu et al, 2018a). The global consumption of aggregates is expected to increase at a rate of 5% per annum (Dhir et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

The potential use of crushed waste glass as a sustainable alternative to natural and manufactured sand in geotechnical applications

Kazmi

Serati

Williams

et al. 2021

Journal of Cleaner Production

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“…There are over 23 countries in which the rockburst phenomenon has been observed, including France, Russia, Ukraine, and others (Zhu et al 2019). Australia is within the top five countries in the world in the mining industry, according to Geoscience Australia, with over 350 mines operating in the country (Youwei et al 2018). Since the early 1900s, mining-induced seismicity and related rockburst have been reported in a number of Australian mines, and particularly in recent years, these issues have become of serious concerns for the safety of versatile Australian mines and have constrained their economic viability (Potvin et al 2000).…”

Section: Introductionmentioning

confidence: 99%

On the accurate strain measurements for the crack initiation determination

Mahmoud¹,

Serati²,

Williams³

et al. 2020

Proceedings of the Second International Conference on Underground Mining Technology

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Due to the huge demand for natural resources and minerals at a global scale, mining depths have progressively increased over the past decades to 1,000 m and deeper. However, despite many successes, deep mining operations are now facing new challenges never experienced before, including rock spalling and unwanted slabbing failures. This phenomenon is characterised as a sudden explosion-like fracture, which can affect the long-term viability and stability of deep underground mining. According to the literature, the most indicative predictor of the spalling strength at laboratory scale is the determination of the crack initiation point, which is defined as the onset of stress-induced damage in low-porosity rocks after the closure of pre-existing cracks. Hence, many methods have been developed to identify this critical design parameter, based mainly on the measurement of vertical, lateral or volumetric strains. That is, an accurate measurement of strain is deemed critical in determining the onset of the crack initiation threshold in the study of rock failure. Nevertheless, it remains difficult to determine the actual sample deformation in many geotechnical test apparatuses (i.e. multi-stage triaxial, Hoek cell, true triaxial, etc.), in which the measured deformation by linear variable differential transformers (LVDTs) is the cumulative deformation of the load frame itself, the loading platens, and the sample. As a result, relying on these deformation measurements can lead to erroneous estimation of the material's strain behaviour. This work presents a qualitative study on how to measure the actual sample deformation in a multi-functional true triaxial testing apparatus recently commissioned at the Geotechnical Engineering Centre (GEC) within the

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Determination of peak and ultimate shear strength parameters of compacted clay

Cited by 32 publications

References 25 publications

A hardening/softening viscoplastic model for large deformation of soil

A hardening/softening viscoplastic model for large deformation of soil

The potential use of crushed waste glass as a sustainable alternative to natural and manufactured sand in geotechnical applications

On the accurate strain measurements for the crack initiation determination

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