Related Experiment Video
Updated: Jun 10, 2025
06:07
Studying Large Amplitude Oscillatory Shear Response of Soft Materials
Published on: April 25, 2019
12.5K
Experimental Study on Acoustic Emission Features and Energy Dissipation Properties during Rock Shear-Slip Process
Zhengnan Zhang1, Xiangxin Liu2, Kui Zhao1
1School of Resource and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China.
Materials (Basel, Switzerland)
|October 16, 2024
Summary
Rock fracturing involves shear-slip, impacting engineering stability. This study links fracture type, acoustic emission features, and energy dissipation, revealing rock-specific mechanisms for better disaster prediction.
Area of Science:
- Geotechnical Engineering
- Rock Mechanics
- Materials Science
Background:
- Rock mass stability is crucial in engineering projects.
- Understanding shear-slip fracturing is key to predicting rock failures.
- Acoustic emission (AE) and energy dissipation are important indicators of rock behavior.
Purpose of the Study:
- To investigate the relationship between fracture type, AE features, and energy dissipation during rock shear-slip fracturing.
- To differentiate the energy dissipation mechanisms in various rock types.
- To establish a foundation for analyzing fracture propagation and predicting shear disasters.
Main Methods:
- Selected granite and sandstone specimens.
- Applied a loading phase: shear failure > slow slip > fast slip.
- Analyzed fracture types, AE signals, and energy dissipation characteristics.
Main Results:
- A strong correlation exists between fracture type, energy dissipation, and AE features.
- The energy dissipation ratio for tension-shear (T-S) composite, shear, and tensile fractures is 10:100:1.
- Tensile and T-S composite fractures dominate the shear failure phase.
Conclusions:
- The study reveals differential energy dissipation mechanisms in rocks based on physical properties.
- Findings provide a basis for understanding rock failure, fracture propagation, and AE characteristics.
- Results offer insights into natural joint shear failure and precursors for geotechnical engineering disasters.
Related Concept Videos
01:20Elastic Strain Energy for Shearing Stresses
165
As discussed in previous lessons, strain energy in a material is the energy stored when it is elastically deformed, a concept crucial in materials science and mechanical engineering. This energy results from the internal work done against the cohesive forces within the material. When a material undergoes shearing stress and corresponding shearing strain, the strain energy density, which is the energy stored per unit volume, is calculated. Within the elastic limit, where the stress is...
165
01:20Strain-Energy Density
376
Understanding the strain energy density in materials under axial load is crucial for evaluating their mechanical behavior and durability. When a rod is subjected to such a load, it elongates and stores energy, known as strain energy, as potential energy within the material. This energy is measured in terms of energy per unit volume.
In the elastic region of a material, the relationship between the stress and the strain is linear and follows Hooke's Law. The strain energy density in this...
In the elastic region of a material, the relationship between the stress and the strain is linear and follows Hooke's Law. The strain energy density in this...
376