Related Experiment Video
Updated: Apr 14, 2026
10:27
A Uniaxial Compression Experiment with CO2-Bearing Coal Using a Visualized and Constant-Volume Gas-Solid Coupling Test System
Published on: June 12, 2019
9.3K
Dynamic Failure Behavior of Conglomerate under Impact Loading: Experimental and Numerical Insights for CO2 Storage
Wei Cheng1,2, Yishan Lou1, Liang Zhu1
1School of Petroleum Engineering, Yangtze University: National Engineering Research Center for Oil & Gas Drilling and Completion Technology, Wuhan 430100, China.
ACS Omega
|April 13, 2026
Summary
Conglomerate
Area of Science:
- Geomechanics
- Materials Science
- Fracture Mechanics
Background:
- Assessing underground CO2 storage reservoir integrity requires understanding conglomerate dynamic failure.
- Multiscale mechanisms and fractal characteristics govern conglomerate behavior under stress.
Purpose of the Study:
- To investigate the strain rate-dependent mechanical response of conglomerate.
- To analyze fractal fragmentation patterns under high strain-rate loading.
- To provide a quantitative framework for geomechanical risk assessment in CO2 sequestration.
Main Methods:
- Dynamic compression tests using a split Hopkinson pressure bar (SHPB) system (strain rates 96–202 s⁻¹).
- Finite element simulations to model mechanical response and fracture.
- Fractal analysis to characterize fragment size distributions and fractal dimensions.
Main Results:
- Dynamic compressive strength increased nearly linearly with strain rate (DIF from 1.3 to 2.0).
- Higher strain rates led to increased energy dissipation, promoting crack initiation and propagation.
- Fractal dimension increased with strain rate, indicating more intense fragmentation and finer fragments.
Conclusions:
- Dynamic failure of conglomerate exhibits fractal characteristics, with fragmentation intensity scaling with strain rate.
- Failure modes transition from shear to combined shear-tensile cracking at higher strain rates.
- Findings support fractal-based constitutive models and aid geomechanical risk assessment for CO2 sequestration.
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