On Eccentric Tube Nosing

2008 ◽  
Vol 130 (1) ◽  
Author(s):  
Mahmoud Nemat-Alla
Keyword(s):  
Finite Element ◽  
Finite Element Simulation ◽  
Design Modification ◽  
Modes Of Failure ◽  
Element Simulation ◽  
Conical Die ◽  
Eccentric Tube ◽  
Different Diameters ◽  
Tube Nosing

Joining two tubes of different diameters has important concerns in many industries and engineering applications. An eccentric reducer is often used in such applications. Therefore, a simple and easy technique for manufacturing an eccentric reducer is of much importance. The simplest technique for producing the eccentric reducers is the tube nosing through eccentric conical dies. In this paper the finite element simulation is used to investigate the eccentric nosing of circular tubes through an eccentric conical die. Simulation is performed to investigate the plastic deformations of the deformed tube and all the possible modes of failure during the eccentric nosing process. Identification of unfavorable modes of failure in the tube nosing process lead to design modification guidelines, design of preform, and the die shape, for the eccentric nosing process. The results obtained confirmed that the modified design of the tube blank not only improves the quality of the nosed-tube product but also reduces nosing load and improves the limiting nosing ratio. Comparison with the experimental results shows that the nosing load and the modes of failure are successfully predicted by the finite element simulation. Also, a preform design for the tube blank that can produce an eccentric reducer with collar end that did not need a trimming process is introduced.

Research on the Connection Performance of Variable Pitch of Screw Threaded Casing Based on 3D Finite Element Simulation Model

2012 ◽  
Vol 215-216 ◽  
pp. 1105-1110 ◽  
Author(s):  
Xiong Guo ◽  
Lv Long Zou ◽  
Bing Lu ◽  
Shi Liang Zhang ◽  
Xing Ren Su ◽  
...  
Keyword(s):  
Finite Element ◽  
Stress Distribution ◽  
Finite Element Simulation ◽  
Element Model ◽  
Static Structure ◽  
3D Finite Element ◽  
Variable Pitch ◽  
Element Simulation ◽  
Ansys Workbench

The connection performance of the large taper, multi-thread, variable pitch of screw threaded casing is researched by 3D finite element simulation on ANSYS Workbench. The 3D finite element model is created precisely. The stress distribution on the teeth of three kind variable pitch of screw threaded structure is studied by using the static structure of the contact analysis module. Contrasting stress distribution of the variable pitch of screw with of the equal pitch of screw under the same working condition, it is validated that design principle for the variable pitch of screw connection is correct. The influence of changes in the amount of variable pitch of screw to the whole stress distribution on teeth is discussed. The results show that the force distribution on the teeth of the variable pitch of screw connection is more uniform than equal pitch of screw, and will improve the overall carrying capacity. This study has its practical value to improve the connective performance of the threaded casing and enhance the product quality of threaded casing.

The Finite Element Simulation of Thermal Deformation and Microstructure Evolution Forecast of AZ61 Alloy

2014 ◽  
Vol 989-994 ◽  
pp. 548-551
Author(s):  
Quan Li ◽  
Wen Jun Liu ◽  
Ren Ju Cheng ◽  
Cheng Li ◽  
Shan Jiang ◽  
...  
Keyword(s):  
Finite Element ◽  
Finite Element Simulation ◽  
Simulation Software ◽  
The Finite Element Method ◽  
Rigid Plastic ◽  
Production Forecast ◽  
Optimization Of Process Parameters ◽  
Element Simulation ◽  
Calculation Results

In this paper, rigid-plastic finite element simulation software Marc / Auto-forge reflect compression AZ61B magnesium alloy case. Simulation results show that the stress, strain and temperature distribution within the sample is uneven, uneven distribution affect the organization, and with the changes in the deformation process and calculation results with the experimental data exactly. The finite element method can be used in the actual production forecast after tissue deformation components, optimization of process parameters to control the quality of the finished piece.

The Effect of Grain Size on the Quality of Micro-Stamping of the Pure Titanium TA1 Foil by Finite Element Simulation

2019 ◽  
Vol 971 ◽  
pp. 3-8
Author(s):  
Rui Chen ◽  
Hong Mei Zhang ◽  
Chang Shun Wang ◽  
Ling Yan ◽  
Yan Li ◽  
...  
Keyword(s):  
Grain Size ◽  
Finite Element ◽  
Surface Morphology ◽  
Finite Element Simulation ◽  
Pure Titanium ◽  
Grain Sizes ◽  
Good Surface ◽  
Element Simulation ◽  
Simulation Results

Pure titanium TA1 foil with a thickness of 0.05mm under different grain sizes were carried out by the DT-C539 micro-stamping machine in the laboratory. The size effect of the pure titanium TA1 foil with grain sizes of 3, 7, 9 and 23 microns respectively on surface morphology of the microstamping sample were studied. It is found that the stamping samples with good surface quality can be obtained on the condition that the grain size is 23 microns and the stamping speed is 1mm/s. VORONOI model was established by using ABAQUS, NEPER and MATLAB software. Heterogeneous finite element simulation was carried out for the micro-stamping process under the same conditions. The results showed that the simulation results were more consistent with the experimental results.

Finite Element Simulation of the Nosing Process of Metal Tubes with a Conical Die

2011 ◽  
Vol 704-705 ◽  
pp. 1444-1450
Author(s):  
Liang Chu ◽  
Li Jun Shi ◽  
Yan Bi ◽  
Da Sen Bi
Keyword(s):  
Finite Element ◽  
Effective Strain ◽  
Von Mises Stress ◽  
Thickness Variation ◽  
Metal Tube ◽  
The Finite Element Method ◽  
Element Simulation ◽  
Conical Die ◽  
Von Mises ◽  
Tube Nosing

In this paper, the nosing process of metal tube with a conical die is investigated using the finite element method, and a series of simulations on the tube nosing process by using the program ABAQUS is carried out. The concrete process of tube nosing deformation is described. Some simulation results on tube nosing deformation such as the distributions of the Von Mises stress and effective strain, the material thickness variation of deformation zone are obtained and analyzed.

Construction and finite element simulation of the saw type gin stand using fractal theory

2020 ◽  
Vol 90 (23-24) ◽  
pp. 2755-2768
Author(s):  
Wen Hu ◽  
Xiaochuan Chen ◽  
Jun Wang ◽  
Yong Li
Keyword(s):  
Finite Element ◽  
Moisture Content ◽  
Finite Element Simulation ◽  
Fractal Theory ◽  
Morphological Structure ◽  
The Finite Element Method ◽  
Cotton Lint ◽  
Element Simulation ◽  
Ansys Workbench

The process of cotton ginning was simulated by the finite element method in order to improve and optimize the efficiency of the process. Based on the fractal theory, a new cotton model was established by observing the morphological structure of cotton: the fractal cotton model with cotton seed. Considering the existence of seeds in actual cotton, the model assumes that the cotton fiber bundles are distributed in a fractal structure and the section is simplified as a circle. The finite element simulation of the model was carried out using ANSYS Workbench software, and the viscoelastic material parameters of cotton fibers were determined under different moisture content, the effects of different moisture contents and rotation speeds on the saw type gin stand were analyzed, and the stress and strain nephograms of cotton at different times were checked. The simulation results showed that when moisture content was between 6.1% and 7.8%, the ginning efficiency is the highest. The higher the speed of the saw tooth, the more severe the effect of ginning, but too high a speed will also affect the quality of the cotton lint. The results showed that the simulation conclusions were in line with the actual situation, and the model had certain application value.

Finite Element Simulation of Forming, Joining and Strength of Sheet Components

2007 ◽  
Vol 344 ◽  
pp. 21-28 ◽  
Author(s):  
Jean Loup Chenot ◽  
Pierre Olivier Bouchard ◽  
Yvan Chastel ◽  
Elisabeth Massoni
Keyword(s):  
Finite Element ◽  
Residual Stresses ◽  
Finite Element Simulation ◽  
Input Data ◽  
Elastic Limit ◽  
Sheet Forming ◽  
Element Simulation ◽  
Mechanical Fastening ◽  
Local Properties

A 3-D solid finite element simulation of sheet forming processes is briefly discussed. Examples of cold or warm deep-drawing and sheet hydro forming are presented. Sheet work-pieces can be assembled to produce complex components by using different techniques: such as welding or mechanical fastening. They must also be simulated in order to evaluate and optimise the quality of the parts; examples of hemming and of self piercing riveting are described. Structural computation allows us to evaluate the strength of a component and especially the strength of the joining. In the future, more precise optimization of the components will be possible by the transfer of data from the previous stages of sheet forming and joining, to the structural computation code. This input data will be firstly the distribution of residual stresses, the evolution of local properties such as elastic limit, damage and anisotropy. An example of structural computation on a system of two sheets assembled by a single rivet is presented.

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