The Dynamic Effect Analysis of Transient Unloading due to Blasting Excavation in Deep and Hard Rock Roadway

2013 ◽  
Vol 753-755 ◽  
pp. 682-685 ◽  
Author(s):  
Jun Guo ◽  
De Qing Gan ◽  
Jing Tan ◽  
Gui Lin Lv
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Hard Rock ◽  
Dynamic Effect ◽  
Rock Fragmentation ◽  
Effect Analysis ◽  
Dynamic Finite Element ◽  
Blasting Excavation ◽  
Rock Roadway ◽  
Element Method

The dynamic effect analysis of transient unloading is one of main points to the mechanism of rock fragmentation by blasting. The paper introduces the details of rhe effect of instantaneous unloading to rock fragmentation by blasting. Use the dynamic finite element method to calculate the process of transient unloading of excavation; get some conclusions about transient unloading.

Effect of Copper Wire Placement Speed Analysis on Actuator Arm by Finite Element

2014 ◽  
Vol 931-932 ◽  
pp. 994-998
Author(s):  
Rangsan Wannapop ◽  
Thira Jearsiripongkul ◽  
Thawatchai Boonluang
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Computer Program ◽  
3D Model ◽  
Copper Wire ◽  
Dynamic Finite Element ◽  
Effect Of Copper ◽  
Explicit Dynamic ◽  
Automatic Loading ◽  
Element Method

This research represents a design and analysis of Automatic loading copper wire machine for the actuator arm (ALCM). The process of copper wire placement on a single actuator arm type compensates human workers. In this research, copper wire placement set is made as a 3D model by computer program before undergoes arrangement analysis via explicit dynamic finite element method to study a suitable speed for copper wire placing. It is considered by characteristics of copper wire after placed and failures occurred during the process that will define suitable speed of motor rotation. The suitable speed is corresponding to copper wire characteristic as preferred, prevent copper wire fracture and time reduction compare to human work.

Study on Mechanical Properties of the Corrugated Waist Rail with the Dynamic Finite Element Method

2014 ◽  
Vol 898 ◽  
pp. 209-212
Author(s):  
Jin Hong Ma ◽  
Shen Bai Zheng ◽  
Bin Tao
Keyword(s):  
Mechanical Properties ◽  
Finite Element Method ◽  
Finite Element ◽  
Comparative Study ◽  
Special Kind ◽  
Lateral Load ◽  
Finite Element Code ◽  
Contact Behavior ◽  
Dynamic Finite Element ◽  
Element Method

The corrugated waist rail has been successfully rolled in the Mill Research Institute of Yanshan University. It is necessary to conduct a comparative study on the mechanical properties of this special kind of rail with that of the ordinary rail. ANSYS/LS-DYNA, the finite element code, is used to simulate the contact behavior of wheel and rail. The study aims to investigate the influences of axle and lateral load on the stresses and displacement of the rail. It draws a conclusion that the mechanical properties of the corrugated waist rail is superior to that of the ordinary rail. It also provides a method and useful data for the further research on fatigue and wear of corrugated waist rail.

An Overview of the Finite Element Method on the Tool-Soil Interacting Problem of Tillage

2014 ◽  
Vol 707 ◽  
pp. 397-400 ◽  
Author(s):  
Xiao Hong Liu ◽  
Yan Yu ◽  
Li Chun Qiu
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Computer Aided Design ◽  
High Efficiency ◽  
Low Cost ◽  
Dynamic Effect ◽  
Research Progress ◽  
The Finite Element Method ◽  
Displacement Fields ◽  
Element Method

This article introduced the up-to-date research progress on the tool-soil interacting problem of tillage; and investigated the situation of constitutive relation usage in the finite element method (FEM). A review including the dynamic effect on the performance of tillage operation with FEM has been conducted. It showed that the virtual reality method with FEM had made much progress in evaluating the tool draft, distribution position of stress and strain, displacement fields and acceleration in soil-tool interactions, soft ware package of computer aided design of tillage tools; it will be a low cost and high efficiency assistive tool in the development procedure of tillage tools, and can be applied to study and analyze the performance of resulting prototypes.

Stability analysis of convection–diffusion equations of different finite-element spaces at discrete times

2019 ◽  
Vol 33 (28) ◽  
pp. 1950330
Author(s):  
Saviour W. Akuamoah ◽  
Aly R. Seadawy ◽  
Dianchen Lu
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Diffusion Problem ◽  
Current Layer ◽  
Element Space ◽  
Time Layer ◽  
Spatial Region ◽  
Dynamic Finite Element ◽  
The Stability ◽  
Element Method

The convection-controlled diffusion problem is hyperbolic in nature and its solutions tend to have numerical shocks. To solve the problem of time dependence, it is common to use finite-element method in the spatial region, while the algorithm proposed in the past with finite differential procedure is mostly limited to the fixed finite-element grid of the spatial region. We often need to use different finite-element spaces at different times, such as the spread of flame, oil and water frontier problems; so many mathematicians and engineers have set their sights on the use of dynamic finite-element space, but also put across a lot of dynamic finite-element methods in giving the general parabola problem of the variable-mesh finite-element method. The principal purpose of this paper is to adopt different spatial grids for different time layers, and project the approximate solution of the previous time layer to the present time layer to act as the initial value of the current layer to enable us deduce the stability at discrete times.

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