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Rock crack initiation triggered by energy digestion.
Lei Yan1,2, Jian Chang3,4, Ebelia Manda5
1Sinosteel Maanshan General Institute of Mining Research Co., Ltd., Xitang Road 666, Maanshan, 243000, People's Republic of China. yanlei7993@sina.com.
Scientific Reports
|July 2, 2024
Summary
This study introduces a new method to assess rock crack initiation using energy digestion. The energy digestion index (EDI) correlates with rock strength, aiding in failure prediction.
Area of Science:
- Rock mechanics
- Material science
- Geophysics
Background:
- Rock failure is complex, involving irreversible deformation and external factors.
- The precise mechanisms of crack initiation in rocks remain incompletely understood.
- Existing theories lack a comprehensive explanation for energy dissipation during rock failure.
Purpose of the Study:
- To apply strain energy theory to understand rock crack initiation.
- To investigate the relationship between energy dissipation and rock strength.
- To develop a novel algorithm for assessing crack initiation.
Main Methods:
- Uniaxial compression tests on sandstone samples under quasi-static loading.
- Analysis of energy evolution, cumulative energy digestion, and stored energy.
- Development of the energy digestion index (EDI) algorithm.
Main Results:
- A direct relationship exists between the rate of energy digestion and crack initiation.
- The energy digestion index (EDI) quantifies rock energy absorption capacity.
- Higher EDI values correlate with reduced mechanical characteristics and peak strength.
Conclusions:
- The study provides a new method for assessing rock crack initiation based on energy digestion.
- The EDI offers insights into the energy absorption capacity of rock materials.
- Monitoring digested energy can aid in evaluating residual strength and predicting rock failure.
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