Numerical Simulation for Rock Fracturing Process under Action of Disc Cutter

2013 ◽  
Vol 690-693 ◽  
pp. 3054-3058
Author(s):  
Li Juan Cao ◽  
Shou Ju Li ◽  
Zi Chang Shang Guan
Keyword(s):  
Numerical Simulation ◽  
Three Dimensional ◽  
Nonlinear Finite Element ◽  
Constitutive Relationship ◽  
Disc Cutter ◽  
Vertical Force ◽  
Nonlinear Finite Element Method ◽  
Rock Fracturing ◽  
Fracturing Process ◽  
Visual Description

Three-dimensional dynamic fracture process of rock under action of disc cutter is simulated by using nonlinear finite element method. Rock constitutive relationship is characterized by Drucker-Prager model. The influences of disc angular velocity and vertical force on the penetration depth and the specific energy are systematically investigated. The simulation results show that the rock fracturing process obviously presents properties of step crushing under action of disc cutter. The proposed numerical simulation presents an improvement on existing ones in terms of providing three-dimensional visual description of rock fracturing process.

scholarly journals ANALYSIS FOR AXIAL LOAD DISTRIBUTION IN PILE IN A PILED RAFT FOUNDATION STIFF CLAY BY FINITE ELEMENT

2017 ◽  
Vol 5 (3) ◽  
pp. 193-197
Author(s):  
Sanjeev Gill ◽  
Seema Rani
Keyword(s):  
Finite Element ◽  
Load Distribution ◽  
Axial Load ◽  
Three Dimensional ◽  
Nonlinear Finite Element ◽  
Nonlinear Finite Element Method ◽  
Piled Raft ◽  
Piled Raft Foundation ◽  
Raft Foundation ◽  
Stiff Clay

In this paper piled raft foundation has been analysed by nonlinear finite element method. The three dimensional nonlinear finite element analyses predict the actual behaviour of axial load distribution. The axial load variation is nonlinear for all the piles. For all pressure the element stress is more than the element stress. For any pressure the nodal deflection is maximum at top and minimum at bottom. Up to certain height the element stress is almost zero for all pressures. After that height the element stress increases with increase in height. The element stress increases with increase in pressure the measurement of axial load distribution in pile in field is very difficult and costly.

Nonlinear Finite Element Static and Corrosion Sensitive Analysis of Radial Steel Gate

2014 ◽  
Vol 1051 ◽  
pp. 886-890 ◽  
Author(s):  
Yue Xin Liu ◽  
Hua Guo ◽  
Jun Lin Wang ◽  
Jian Heng Sun
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Nonlinear Analysis ◽  
Three Dimensional ◽  
Nonlinear Finite Element ◽  
Nonlinear Finite Element Method ◽  
Stress Variation ◽  
Sensitive Analysis ◽  
Corrosion Depth ◽  
Steel Gate

Using nonlinear finite element method, the three dimensional nonlinear analysis of the radial steel gate of a reservoir is carried out. In the analysis, the radial steel gate considering and without considering the stiffeners of the panel is analyzed to investigate the effect of the stiffener to the panel. In the corrosion sensitive analysis, the panel of the gate is divided into three sections, and the nonlinear analysis is carried out for each section that is rusted with different corrosion depth. The corrosion sensitive section and the stress variation with the corrosion depth are present.

The performance of TBM disc cutter in soft strata: A numerical simulation using the three-dimensional RBD-DEM coupled method

2021 ◽  
Vol 119 ◽  
pp. 104996
Author(s):  
Yong Fang ◽  
Zhigang Yao ◽  
Wanghao Xu ◽  
Qingfeng Tian ◽  
Chuan He ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Three Dimensional ◽  
Disc Cutter ◽  
Coupled Method

Analysis of Spring-Back Behavior in the Cold-Forming Process of Three-Dimensionally Curved Metal Plates

2010 ◽  
Author(s):  
Jeom Kee Paik ◽  
Jeong Hwan Kim ◽  
Bong Ju Kim ◽  
Chang Hyo Tak
Keyword(s):  
Three Dimensional ◽  
Nonlinear Finite Element ◽  
Steel Plates ◽  
Nonlinear Finite Element Method ◽  
Spring Back ◽  
Forming Process ◽  
Cold Forming ◽  
Metal Plates ◽  
Computer Aided ◽  
Advanced Computer

The present paper is part of the study to develop the advanced computer aided manufacture (CAM) system called the changeable die system (CDS) that applies the cold-forming technique to produce curved metal plates with complex, three-dimensional geometry. This paper focuses on the algorithm of predicting the spring-back behavior using nonlinear finite element method, which is a key element within the framework of the CDS process. The validity of the algorithm is confirmed by comparison with experimental results obtained by the CDS machine in the cold-forming process of curved steel plates.

Mechanical Models and Numerical Simulation of Rolling Compaction for Metal Powders

2006 ◽  
Vol 532-533 ◽  
pp. 817-820
Author(s):  
Ming Jun Liu ◽  
Wei Xia ◽  
Zhao Yao Zhou ◽  
Pu Qing Chen ◽  
Jun Jun Wang ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Special Functions ◽  
Rolling Force ◽  
Yield Criterion ◽  
Three Dimensional ◽  
Friction Model ◽  
Constitutive Relationship ◽  
Metal Powders ◽  
Rolling Velocity ◽  
Mechanical Models

The rolling compaction can produce porous or dense strips with special functions. The mechanical behaviors in rolling compaction are hard to predict accurately and efficiently by traditional means. The numerical simulation based on the Finite Element Method (FEM) provides a flexible and efficient way for such problems. This paper introduces three-dimensional (3-D) FEM simulations for the rolling compaction of the iron matrix powders. The elliptical yield criterion, elasto-plastic constitutive relationship and the friction model were analyzed. Simulations were based on the second-developed user subroutine in MSC.Marc. Effects of friction and rolling velocity on the rolling force, distribution of the density and some other parameters were analyzed.

scholarly journals Influence of Deformation and Stress between Bone and Implant from Various Bite Forces by Numerical Simulation Analysis

2017 ◽  
Vol 2017 ◽  
pp. 1-7 ◽  
Author(s):  
Hsin-Chung Cheng ◽  
Boe-Yu Peng ◽  
May-Show Chen ◽  
Chiung-Fang Huang ◽  
Yi Lin ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Simulation Analysis ◽  
Three Dimensional ◽  
Vertical Force ◽  
Stress Distributions ◽  
Orthodontic Anchorage ◽  
Bone Implant ◽  
Endosseous Implant ◽  
Oral Implant ◽  
And Function

Endosseous oral implant is applied for orthodontic anchorage in subjects with multiple tooth agenesis. Its effectiveness under orthodontic loading has been demonstrated clinically and experimentally. This study investigates the deformation and stress on the bone and implant for different bite forces by three-dimensional (3D) finite element (FE) methods. A numerical simulation of deformation and stress distributions around implants was used to estimate the survival life for implants. The model was applied to determine the pattern and distribution of deformations and stresses within the endosseous implant and on supporting tissues when the endosseous implant is used for orthodontic anchorage. A threaded implant was placed in an edentulous segment of a human mandible with cortical and cancellous bone. Analytical results demonstrate that maximum stresses were always located around the implant neck in marginal bone. The results also reveal that the stress for oblique force has the maximum value followed by the horizontal force; the vertical force causes the stress to have the minimum value between implant and bone. Thus, this area should be preserved clinically to maintain the structure and function of a bone implant.

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