Related Experiment Video
Updated: May 20, 2025
06:54
A Virtual Simulation Experiment of Mechanics: Material Deformation and Failure Based on Scanning Electron Microscopy
Published on: January 20, 2023
2.1K
Study on material point failure probability of complex jointed rock masses based on peridynamics
Yigong Zhao1, Xiaoyan Zhang2, Ze Li3
1Faculty of Civil Engineering and Mechanics, Kunming University of Science and Technology, Kunming, 650500, Yunnan, China.
Scientific Reports
|March 25, 2025
Summary
This study uses peridynamics (PD) and Monte Carlo simulations to analyze how joint dip angles affect rock mass failure. It introduces methods to identify key joints, improving predictions for geotechnical engineering.
Area of Science:
- Rock Mechanics
- Geotechnical Engineering
- Computational Mechanics
Background:
- Rock mass failure prediction is complex due to randomly distributed joints.
- Key joints significantly influence rock mass fracturing and failure paths.
Purpose of the Study:
- To investigate the impact of varying joint dip angles in complex joint networks on rock mass failure probabilities.
- To develop quantitative assessment tools for rock mass failure prediction.
- To introduce concepts for identifying key and non-key joints.
Main Methods:
- Peridynamics (PD) method combined with Monte Carlo simulation analysis.
- Development of efficient parallel computing programs for large-scale simulations.
- Introduction and application of material point failure probability (PFP) and Joint Angle Impact Coefficient (JAIC) contour maps.
Main Results:
- Demonstrated the influence of joint dip angles on rock mass failure probabilities in complex networks.
- Generated grid-based PFP and JAIC contour maps for quantitative assessment.
- Introduced grid-based concepts of key and non-key joint dip angles.
Conclusions:
- Established statistical methods for identifying key and non-key joints in rock mass grid regions.
- Provided new perspectives and tools for understanding and predicting rock mass failure.
- Contributed to rock mechanics reliability studies and geotechnical engineering guidance.
Related Concept Videos
01:16Dynamic Modulus of Elasticity of Concrete
227
The dynamic modulus of elasticity assesses how a concrete structure deforms under impact or dynamic loads. It is typically higher than the static modulus of elasticity, measured under slow, steady loading conditions.
The sonic test is a common method to determine the dynamic modulus. In this test, a concrete beam, sized either 6 x 6 x 30 inches or 4 x 4 x 20 inches, is clamped at its center. Vibrations are initiated at one end of the beam by an electromagnetic exciter unit powered by...
The sonic test is a common method to determine the dynamic modulus. In this test, a concrete beam, sized either 6 x 6 x 30 inches or 4 x 4 x 20 inches, is clamped at its center. Vibrations are initiated at one end of the beam by an electromagnetic exciter unit powered by...
227
01:30Method of Joints: Problem Solving I
1.0K
The method of joints is a commonly used technique to analyze the forces in structural trusses. The method is based on the principle of equilibrium, which assumes that the truss members are connected by frictionless pins. The forces at each joint can be determined by considering the equilibrium of the forces acting on that joint. Consider a truss structure with two forces of 20 N and 10 N acting at joints C and D, respectively. The method of joints can be used to determine the forces FCB, FDC,...
1.0K
01:11Deformation of Member under Multiple Loadings
141
When a rod is made of different materials or has various cross-sections, it must be divided into parts that meet the necessary conditions for determining the deformation. These parts are each characterized by their internal force, cross-sectional area, length, and modulus of elasticity. These parameters are then used to compute the deformation of the entire rod.
In the case of a member with a variable cross-section, the strain is not constant but depends on the position. The deformation of an...
In the case of a member with a variable cross-section, the strain is not constant but depends on the position. The deformation of an...
141
01:30Method of Joints: Problem Solving II
479
Consider a truss structure with frictionless joints fixed to a wall and roller support. If a force of 150 N is applied to joint A, the forces in each member of the truss can be determined using the method of joints.
479
01:21Fatigue
169
Fatigue occurs when materials rupture under repeated or fluctuating loads, even at stress levels far below their static breaking strength. It typically results in brittle failure, even for ductile materials. It is a critical consideration in designing machines and structural components subjected to repetitive or varying loads. The nature of these loadings can range from fluctuating loads like unbalanced pump impellers causing vibrations to repeatedly bending a thin steel rod wire back and forth...
169
01:08Bending of Members Made of Several Materials
133
In analyzing a structural member composed of two different materials with identical cross-sectional areas, it is crucial to understand how their distinct elastic properties affect the member's response under load. The analysis involves assessing stress and strain distributions using the transformed section concept, which accounts for variations in material properties.
Hooke's Law determines stress in each material, stating that stress is proportional to strain but varies due to each...
Hooke's Law determines stress in each material, stating that stress is proportional to strain but varies due to each...
133