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An Initial Damage Model of Rock Materials under Uniaxial Compression Considering Loading Rates
Gang Meng1,2, Zhizhen Liu1, Ping Cao1
1School of Resource and Safety Engineering, Central South University, Changsha 410083, China.
Materials (Basel, Switzerland)
|August 26, 2022
Summary
This study introduces a new model for rock damage that accounts for initial material flaws. Findings show that yellow sandstone strength increases with higher loading rates.
Area of Science:
- Geotechnical Engineering
- Materials Science
- Rock Mechanics
Background:
- Existing rock damage models often overlook initial material imperfections.
- Real rock materials exhibit inherent initial damage characteristics.
- Accurate modeling requires incorporating these initial conditions.
Purpose of the Study:
- To develop an improved rock damage model that includes initial damage characteristics.
- To analyze the influence of loading rates on rock behavior.
- To present a novel initial damage model for yellow sandstone.
Main Methods:
- Performed a series of compression tests on yellow sandstone specimens.
- Analyzed acoustic emission characteristics during testing.
- Developed and validated a new initial damage model.
Main Results:
- Yellow sandstone strength is dependent on the loading rate.
- Elastic modulus of yellow sandstone increases with higher loading rates.
- The proposed initial damage model effectively describes material behavior.
Conclusions:
- Initial damage characteristics significantly influence rock material behavior.
- Loading rate is a critical factor affecting sandstone strength and stiffness.
- The new model provides a more accurate representation of rock damage.
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