Mechanical Properties and Energy Evolution of Fractured Sandstone under Cyclic Loading
Xinwei Li1, Zhishu Yao1, Xianwen Huang2
1School of Civil Engineering and Architecture, Anhui University of Science and Technology, Huainan 232001, China.
Materials (Basel, Switzerland)
|September 9, 2022
Summary
Fracture angles significantly impact sandstone deformation and energy release under cyclic loading. Damage energy increases with load, offering insights into rock failure prediction.
Area of Science:
- Geotechnical Engineering
- Rock Mechanics
- Materials Science
Background:
- Sandstone exhibits varied deformation and energy behaviors under cyclic loading due to fracture distribution.
- Understanding these characteristics is crucial for predicting rock damage and failure.
Purpose of the Study:
- To investigate the deformation and energy evolution in fractured sandstone under uniaxial cyclic loading.
- To analyze the influence of fracture angles on these properties.
Main Methods:
- Conducted uniaxial cyclic loading tests on fractured sandstone samples with varying fracture angles.
- Established an energy analysis model based on viscoelastic deformation theory, incorporating damping and damage energy.
- Analyzed deformation modulus, lateral expansion coefficient, and energy indexes in relation to peak load and fracture angles.
Main Results:
- Sandstone's deformation modulus initially increased then decreased with cyclic loading.
- Lateral expansion coefficient showed a positive correlation with peak load.
- Dissipated energy was categorized into damping energy and damage energy.
- Damage energy exhibited a trend of slow then rapid increase with loading.
Conclusions:
- Fracture angle is a key factor influencing sandstone's mechanical response and energy dissipation under cyclic loading.
- The developed energy model effectively describes the relationship between elastic properties, energy components, and fracture angles.
- Findings provide valuable data for assessing and predicting rock damage and failure in engineering applications.
Keywords:
deformation modulusenergy evolutionfractured sandstonelateral expansion coefficientviscoelasticityMore Related Videos
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