Research and Development of the Porthole-Die Aluminium Alloy Extrusion Processes

2012 ◽  
Vol 472-475 ◽  
pp. 214-218
Author(s):  
Shu Mei Lou ◽  
Lin Jing Xiao
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Research And Development ◽  
Aluminium Alloy ◽  
Simulation Method ◽  
Empirical Method ◽  
Arbitrary Lagrangian Eulerian ◽  
Porthole Die ◽  
Lagrangian Finite Element ◽  
Volume Method

The current research on the porthole-die aluminium alloy extrusion is presented here. The empirical method and simulation method are analyzed. Particularly, the Lagrangian Finite Element Method(FEM), Eulerian Finite Volume Method(FVM) and Arbitrary-Lagrangian Eulerian(ALE) algorithm are compared. The development of the porthole-die aluminium is educed.

Analysis on the Hydroplaning of Aircraft Tire

2009 ◽  
Vol 87-88 ◽  
pp. 1-6 ◽  
Author(s):  
You Shan Wang ◽  
Jian Wu ◽  
Ben Long Su
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Element Model ◽  
Tire Model ◽  
Inflation Pressure ◽  
Civil Aircraft ◽  
Key Factor ◽  
Lagrangian Finite Element ◽  
Patterned Tire ◽  
Volume Method

Aircraft tire is an important subassembly of aircraft, which is related to its safety tightly, especially for civil aircraft. Moreover, hydroplaning of aircraft tires is often a contributing factor in take-off and landing overrun and veeroff accidents. Therefore the study on them is imperative. For studying the hydroplaning of aircraft tire, a 2D finite element model of aircraft tire is developed by using TYABAS software, and then a 3D patterned tire model is presented. The hydroplaning of aircraft tire is analyzed by generally coupling an Eulerian finite volume method and an explicit Lagrangian finite element method. The hydroplaning speeds are investigated, which is a key factor of hydroplaning. Results indicated that the hydroplaning speed increases with the increment of inflation pressure; the hydroplaning speed decreases with the increment of the footprint aspect ratio.

FVM Simulation of Porthole Die Extrusion Process for a Large Caliber Aluminum Tube Profile

2015 ◽  
Vol 778 ◽  
pp. 116-119
Author(s):  
Rui Wang
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Finite Volume Method ◽  
Finite Volume ◽  
Extrusion Process ◽  
Aluminum Tube ◽  
Porthole Die ◽  
Aluminum Profile ◽  
Volume Method ◽  
Aluminum Profile Extrusion

Aiming at the aluminum profile extrusion process of a large caliber aluminum tube with porthole die, this paper established the simulation models by using finite element method and finite volume method, respectively. The extrusion process was simulated by using the above two models. The advantages and disadvantages and the applicability of the two simulation methods in simulating large aluminum profile extrusion processes were compared. It is concluded that finite volume method is more suitable than finite element method for simulating aluminum profile extrusion processes with a severe deformation. In addition, the distributions of stress and strain and the material flow patterns in the large caliber aluminum tube extrusion process with porthole die were given in detail. The results can provide useful theoretical guidelines for the process and die design as well as process parameter optimal selection for large aluminum profile extrusion processes with porthole die.

Modeling of streamers in transformer oil using OpenFOAM

2014 ◽  
Vol 33 (4) ◽  
pp. 1272-1281 ◽  
Author(s):  
Nils Lavesson ◽  
Jonathan Jogenfors ◽  
Ola Widlund
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Design Methodology ◽  
Simulation Method ◽  
Transformer Oil ◽  
The Finite Element Method ◽  
Fem Model ◽  
Content Type ◽  
Second Mode ◽  
Volume Method

Purpose – A model for streamers based on charge transport has been developed by MIT and ABB. The purpose of this paper is to investigate the consequences of changing numerical method from the finite element method (FEM) to the finite volume method (FVM) for simulations using the streamer model. The new solver is also used to extend the simulations to 3D. Design/methodology/approach – The equations from the MIT-ABB streamer model are implemented in OpenFOAM which uses the FVM. Checks of the results are performed including verification of convergence. The solver is then applied to some of the key simulations from the FEM model and results presented. Findings – The results for second mode streamers are confirmed, whereas the results for third mode streamers differ significantly leading to questioning of one hypothesis proposed based on the FEM results. The 3D simulations give consistent results and show a way forward for future simulations. Originality/value – The FVM has not been applied to the model before and led to more confidence in second mode result and revising of third mode results. In addition the new simulation method makes it possible to extend the results to 3D.

Numerical Analysis of Residual Stresses and Distortions in Aluminium Alloy Welded Joints

2015 ◽  
Vol 809-810 ◽  
pp. 443-448 ◽  
Author(s):  
Tomasz Kik ◽  
Marek Slovacek ◽  
Jaromir Moravec ◽  
Mojmir Vanek
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Aluminium Alloy ◽  
Thermal Cycle ◽  
Technology Development ◽  
Welding Process ◽  
Simulation Software ◽  
Structure Knowledge ◽  
Welding Processes ◽  
Element Method

Simulation software based on a finite element method have significantly changed the possibilities of determining welding strains and stresses at early stages of product design and welding technology development. But the numerical simulation of welding processes is one of the more complicated issues in analyses carried out using the Finite Element Method. A welding process thermal cycle directly affects the thermal and mechanical behaviour of a structure during the process. High temperature and subsequent cooling of welded elements generate undesirable strains and stresses in the structure. Knowledge about the material behaviour subjected to the welding thermal cycle is most important to understand process phenomena and proper steering of the process. The study presented involved the SYSWELD software-based analysis of MIG welded butt joints made of 1.0 mm thickness, 5xxx series aluminium alloy sheets. The analysis of strains and the distribution of stresses were carried out for several different cases of fixing and releasing of welded elements.

The Flow of UCM and Oldroyd-B Fluids Past a Cylinder

2000 ◽  
Author(s):  
Manuel A. Alves ◽  
Fernando T. Pinho ◽  
Paulo J. Oliveira
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
High Resolution ◽  
Constitutive Equations ◽  
Numerical Procedure ◽  
Plane Flow ◽  
Dependent Variables ◽  
High Resolution Schemes ◽  
Structured Meshes ◽  
Volume Method

Abstract Accurate solutions are obtained with the numerical method of Oliveira et al (1998) for the inertialess plane flow around a confined cylinder. This numerical procedure is based on the finite-volume method in non-orthogonal block-structured meshes with a collocated arrangement of the dependent variables, and makes use of a special interpolation practice to avoid stress-velocity decoupling. Two high-resolution schemes are implemented to represent the convective terms in the constitutive equations for the upper converted Maxwell and Oldroyd-B fluids, and the resulting predictions of the drag coefficient on the cylinder are shown to be as accurate as existing finite-element method predictions based on the very accurate h-p refinement technique.

scholarly journals Analysis of Vertical Stiffness of Air Spring Based on Finite Element Method

2018 ◽  
Vol 153 ◽  
pp. 06006
Author(s):  
Jiatong Ye ◽  
Hua Huang ◽  
Chenchen He ◽  
Guangyuan Liu
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Finite Element Simulation ◽  
Element Model ◽  
Simulation Method ◽  
Bench Test ◽  
Air Spring ◽  
Vertical Stiffness ◽  
Element Simulation ◽  
Element Method

In this paper, a finite element model of membrane air spring in the vehicle is established, and its vertical stiffness characteristics under a certain inflation pressure are analysed. The result of finite element simulation method is compared with the result of the air spring bench test. The accuracy and reliability of the finite element simulation method in nonlinear analysis of air spring system are verified. In addition, according to the finite element method, the influence of the installation of the air spring limit sleeve on its stiffness is verified.

Experimental and Finite-Element Method Study of Zn-22Al Alloy Pipe Hot Extrusion Using a Porthole Die

2013 ◽  
Vol 22 (11) ◽  
pp. 3296-3305 ◽  
Author(s):  
X. P. Zhang ◽  
X. H. Dong ◽  
S. F. Feng ◽  
X. T. Hong ◽  
W. Tang ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Hot Extrusion ◽  
Porthole Die ◽  
Element Method
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