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Local shear mechanical behavior of rock joint under constant normal load
Wanlin Wang1,2, Haichun Ma3,4, Changlin Dai1
1School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, 230009, China.
Scientific Reports
|April 7, 2026
Summary
This study analyzes shear forces and shear zones in rock engineering under constant normal load. It reveals how load and displacement variations impact shear behavior and failure patterns.
Area of Science:
- Geotechnical Engineering
- Rock Mechanics
- Computational Mechanics
Background:
- The shear mechanical behavior of joint surfaces is critical for rock engineering safety and stability.
- Understanding microscopic phenomena during shear is essential for predicting rock failure.
Purpose of the Study:
- To investigate the influence of load and shear displacement on shear forces and shear zones.
- To analyze the microscopic mechanisms of shear failure in rock joints.
Main Methods:
- Utilized the boundary element method to calculate normal contact forces under constant normal load (CNL).
- Developed a shear force calculation program integrating the "dip angle" and the Patton model for discrete element analysis.
Main Results:
- Observed that variations in load and shear displacement significantly affect shear forces and the expansion/contraction of shear zones.
- Identified differential shear force patterns at local fracture points, correlating higher shear stress with increased susceptibility to shear failure.
Conclusions:
- The study provides a reference for understanding shear force and shear zone variations during shear processes.
- Offers a new perspective on investigating the mechanisms and patterns of shear failure in rock joints.
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