Related Experiment Video
Updated: Mar 7, 2026
07:37
Full-field Strain Measurements for Microstructurally Small Fatigue Crack Propagation Using Digital Image Correlation Method
Published on: January 16, 2019
10.2K
Study on rock energy and microscopic failure under different stress states
Lixiang Xie1,2,3, Bingyang Li4, Jinshan Sun1,2
1State Key Laboratory of Precision Blasting, Jianghan University, Wuhan, 430056, Hubei, China.
Scientific Reports
|March 5, 2026
Summary
This study reveals how confining pressure and intermediate principal stress affect marble's mechanical behavior and failure. Understanding these factors is crucial for deep underground engineering stability.
Area of Science:
- Geotechnical Engineering
- Rock Mechanics
- Materials Science
Background:
- Deep underground engineering faces challenges with rock mass instability and failure.
- Marble's prevalence makes its mechanical behavior a key research area.
Purpose of the Study:
- To investigate marble's mechanical response, energy dynamics, and fracture evolution under various stress conditions.
- To understand the influence of confining pressure and intermediate principal stress on marble failure.
Main Methods:
- Laboratory experiments were conducted to analyze marble's mechanical properties.
- Particle flow numerical simulations were used to model stress-strain behavior and crack evolution.
- Energy analysis was performed to determine failure mechanisms and energy dissipation characteristics.
Main Results:
- Increasing confining pressure enhances marble strength and ductility.
- Intermediate principal stress nonlinearly regulates mechanical properties and failure modes.
- Tensile failure is dominant, but shear failure increases with confining pressure.
Conclusions:
- Marble's failure is complex, influenced by stress conditions and energy dissipation.
- Findings provide a theoretical basis for stability assessment in deep underground engineering.
- Energy-based criteria for underground structures can be developed based on this research.
Related Concept Videos
01:24Stress-Strain Diagram - Ductile Materials
2.3K
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...
2.3K
01:24Stress-Strain Diagram - Brittle Materials
4.6K
Brittle materials, including glass, cast iron, and stone, exhibit unique characteristics. They fracture without considerable change in their elongation rate, indicating that their breaking and ultimate strength are equivalent. Such materials also show lower strain levels at the point of rupture. The failure in brittle materials predominantly results from normal stresses, as evidenced by the rupture created along a surface perpendicular to the applied load. These materials do not display...
4.6K
01:21Fatigue
903
Fatigue occurs when materials rupture under repeated or fluctuating loads, even at stress levels far below their static breaking strength. It typically results in brittle failure, even for ductile materials. It is a critical consideration in designing machines and structural components subjected to repetitive or varying loads. The nature of these loadings can range from fluctuating loads like unbalanced pump impellers causing vibrations to repeatedly bending a thin steel rod wire back and forth...
903
01:25Yield Criteria for Ductile Materials under Plane Stress
625
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...
625
01:21General State of Stress
719
The general state of stress within a material can be accurately depicted using a stress tensor. This tensor encapsulates the internal forces distributed within a material subjected to external forces or deformations.
Specifically, consider a tetrahedral element where one face, labeled XYZ, is perpendicular to the line OA, and the remaining faces align with the coordinate axes with point O as the origin. At any point, such as point O, the stress tensor can be used to determine the stress...
Specifically, consider a tetrahedral element where one face, labeled XYZ, is perpendicular to the line OA, and the remaining faces align with the coordinate axes with point O as the origin. At any point, such as point O, the stress tensor can be used to determine the stress...
719
01:20Microcracking in Concrete
523
Microcracking in concrete refers to the tiny cracks that can form within the material even before any external load is applied. These microcracks typically occur at the interface between the coarse aggregate and the hydrated cement paste, often as a result of differential volume changes prompted by variations in stress-strain behavior, as well as thermal and moisture movement. Initially, these microcracks remain stable and do not grow substantially until the concrete is stressed to about 30...
523