Related Experiment Video
Updated: Jul 6, 2025
05:04
Determining the Mechanical Strength of Ultra-Fine-Grained Metals
Published on: November 22, 2021
2.3K
Comparison between methods for determining the effective vertical yield stress of intermediate fine-grained soils
Bartłomiej Szczepan Olek1, Magdalena Moskal2
1Faculty of Civil Engineering, Cracow University of Technology, Cracow, Poland. bartlomiej.olek@pk.edu.pl.
Scientific Reports
|January 3, 2024
Summary
This study compares twelve methods for determining effective vertical yield stress in fine-grained soils. Methods based on work approach and Casagrande
Area of Science:
- Geotechnical Engineering
- Soil Mechanics
- Material Science
Background:
- Effective vertical yield stress (σ'xy) is crucial for understanding fine-grained soil behavior under load.
- This parameter informs settlement predictions and stress history assessments in constitutive models.
- Soil behavior changes with recoverable and irrecoverable strains during loading, influenced by yield stress.
Purpose of the Study:
- To statistically compare twelve distinct methods for determining effective vertical yield stress (σ'xy).
- To assess the consistency and association between different yield stress determination techniques.
- To identify reliable methods for analyzing fine-grained soil mechanical properties.
Main Methods:
- Conducted oedometric compression tests on 25 diverse fine-grained soil samples.
- Performed a two-staged statistical analysis to compare twelve methods: Casagrande (CM), Pacheco Silva (PSM), Butterfield (BTM), Oikawa (OIM), Onitsuka (ONM), Boone (BM), Becker (WM), Morin (WPUVSM), Wang & Frost (DSEM), Tavenas (SEM), Senol (SLSEM), and Janbu (JM).
- Analyzed differences and associations between the obtained effective vertical yield stress (σ'xy) values.
Main Results:
- Methods based on the work approach (WM, WPUVSM, DSEM) and Casagrande (CM) yielded comparable effective vertical yield stress (σ'xy) values.
- Bi-logarithmic plot methods (BTM, OIM, ONM) produced slightly higher or lower effective vertical yield stress (σ'xy) values compared to Boone (BM) and Janbu (JM).
- Other methods exhibited medium to high variability, showing sensitivity to procedural disturbances.
Conclusions:
- The work approach and Casagrande methods offer consistent results for effective vertical yield stress (σ'xy) in fine-grained soils.
- Bi-logarithmic plot methods show moderate agreement, while other techniques demonstrate significant variability.
- Careful selection of the effective vertical yield stress (σ'xy) determination method is vital for accurate soil mechanics analysis.
More Related Videos
Related Concept Videos
01:25Yield Criteria for Ductile Materials under Plane Stress
164
In designing structural elements and machine parts using ductile materials, it is crucial to ensure that these components withstand applied stresses without yielding. Yielding is initially determined through a tensile test, which evaluates the material's response to uniaxial stress. However, tensile stress is insufficient when components face biaxial or plane stress conditions This condition requires advanced criteria to predict failure.
The Maximum Shearing Stress Criterion, also known as...
The Maximum Shearing Stress Criterion, also known as...
164
01:20Elasticity in Concrete
95
Upon subjecting concrete to moderate or high uniaxial compressive or tensile stresses, the strain response is non-linear relative to the stress applied. As the stress is removed, the resulting stress-strain curve deviates from the original path traced during loading, creating a hysteresis loop, indicative of the concrete's non-linear and non-elastic properties. Typically, a material's modulus of elasticity, which is a measure of the material's stiffness, is inferred from the linear...
95
01:15Principal Stresses: Problem Solving
185
When analyzing two planes intersecting at right angles under the influence of shearing, tensile, and compressive stresses, it is essential to identify principal planes, maximum shearing stress, and principal stresses. To find the principal planes, apply a formula that equates them to twice the shearing stress divided by the difference between tensile and compressive stresses.
185
01:24Stress-Strain Diagram - Ductile Materials
725
The stress-strain relationship in ductile materials such as structural steel or aluminium is intricate and progresses through several stages. When a specimen is loaded, it initially exhibits a linear length increase, depicted by a steep straight line on the stress-strain diagram. It indicates the material is elastically deforming and will return to its original shape once unloaded. However, when a critical stress value is reached, plastic deformation begins. This stage sees substantial...
725
01:20Strength of Cement
138
Strength tests for cement are not performed directly on neat cement paste due to difficulty in obtaining consistent, reliable specimens. Instead, cement is typically tested in the form of cement-sand mortar.
For compressive strength tests, ASTM C 109-05 standards prescribe a cement-sand mix ratio of 1:2.75 and a water/cement ratio of 0.485 for making 2-inch cubes. These cubes are mixed, cast, and cured in saturated lime water at 23°C until testing. Flexural strength testing, outlined in...
For compressive strength tests, ASTM C 109-05 standards prescribe a cement-sand mix ratio of 1:2.75 and a water/cement ratio of 0.485 for making 2-inch cubes. These cubes are mixed, cast, and cured in saturated lime water at 23°C until testing. Flexural strength testing, outlined in...
138
01:15Stress: General Loading Conditions
313
To grasp the intricacy of real-world conditions where multiple loads are applied simultaneously to a structure, one might visualize a section passing through a specific point within a body, aligned parallel to the xy plane. This section is subjected to various forces, including original loads, normal forces, and shearing forces.
The shearing force, possessing potential directionality within the plane of the section, is simplified into two component forces running parallel to the x and y axes....
The shearing force, possessing potential directionality within the plane of the section, is simplified into two component forces running parallel to the x and y axes....
313