Related Experiment Video
Updated: Jul 6, 2025
06:15
Performing Microscope-Mounted Y-Shaped Cutting Tests
Published on: January 20, 2023
1.8K
Study conical pick cutting performance and fatigue life in breaking rock plate process with numerical simulation
1College of Mechanical and Electronic Engineering, Shandong University of Science and Technology, Qingdao, 266590, China. skdmywang@outlook.com.
Scientific Reports
|January 10, 2024
Summary
This study reveals how rock structure, including joints, bedding, and confining pressure, significantly impacts conical pick performance and rock damage during excavation. Understanding these factors is crucial for optimizing roadheader efficiency and tool longevity.
Area of Science:
- Engineering
- Geomechanics
- Materials Science
Background:
- Conical pick performance is vital for roadheader excavation efficiency.
- Rock structural conditions influence rock breaking and damage during excavation.
Purpose of the Study:
- To investigate the effects of rock joints, bedding, and confining pressure on conical pick cutting performance and fatigue life.
- To analyze rock damage under varying rock structural conditions.
Main Methods:
- Established a simulation model for conical pick cutting jointed rock.
- Utilized MATLAB for statistical analysis of rock damage.
Main Results:
- Cutting force is influenced by rock joint length, bedding angle, and confining pressure.
- Rock damage correlates with joint length, bedding angle, and confining pressure, with varying trends.
- Rock fracture volume is positively correlated with rock damage.
Conclusions:
- Rock structural parameters significantly affect conical pick cutting performance.
- Rock structural parameters have a substantial influence on the extent of rock damage during excavation.
Related Concept Videos
01:21Fatigue
185
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...
185
01:09Transmission Shafts: Problem Solving
240
Designing a solid shaft that transmits power from a motor to a machine tool involves a series of calculations to ensure the shaft can withstand the stresses applied by bending moments and torques. First, calculate the torque exerted on the gear, considering the power transmitted by the shaft and its rotational speed. Following this, compute the tangential forces acting on the gears, which directly relate to the torque and the gear radius.
Next, use bending moment diagrams for the shaft to...
Next, use bending moment diagrams for the shaft to...
240
01:20Microcracking in Concrete
122
Microcracking in concrete refers to the tiny cracks that can form within the material even before any external load is applied. These microcracks typically occur at the interface between the coarse aggregate and the hydrated cement paste, often as a result of differential volume changes prompted by variations in stress-strain behavior, as well as thermal and moisture movement. Initially, these microcracks remain stable and do not grow substantially until the concrete is stressed to about 30...
122
01:18Stress Concentrations in Circular Shafts
177
Consider the elastic torsion formula, which applies to a circular shaft with a consistent cross-section. This formula assumes that the shaft's ends are loaded with rigid plates firmly attached. However, in many cases, torques are applied to the shaft through mechanisms like flange couplings or gears, which are connected by keys inserted into keyways. This application method modifies the stress distribution near the point of torque application, causing it to deviate from the distributions...
177