Upper-bound and finite-element analysis of axisymmetric hot extrusion

1996 ◽  
Vol 57 (1-2) ◽  
pp. 14-22 ◽  
Author(s):  
N. Venkata Reddy ◽  
R. Sethuraman ◽  
G.K. Lal
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Upper Bound ◽  
Hot Extrusion ◽  
Element Analysis

Finite Element Analysis of Composite Volleyball Upright Structures

2012 ◽  
Vol 446-449 ◽  
pp. 247-250
Author(s):  
Lu Yang Shan ◽  
Yi Shan
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Static Analysis ◽  
Upper Bound ◽  
Stress Distributions ◽  
Dynamic Impact ◽  
Fe Method ◽  
Element Analysis ◽  
Impact Effect ◽  
Finite Element Software

A composite FRP volleyball upright structure is analyzed by finite element (FE) method. A static analysis is performed using commercial finite element software ANSYS. Deformation and stress distributions under regular and upper bound force (i.e., to include dynamic/impact effect) are provided. An elastic eigenvalue analysis is carried out as well to predict the buckling load and modes.

Development of a stream function-upper bound analysis applicable to the process of plate rolling

2016 ◽  
Vol 12 (2) ◽  
pp. 254-274 ◽  
Author(s):  
Amir Asgharzadeh ◽  
Siamak Serajzadeh
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Velocity Field ◽  
Stream Function ◽  
Upper Bound ◽  
Deformation Zone ◽  
Deformation Pattern ◽  
Element Analysis ◽  
Content Type ◽  
Plate Rolling

Purpose – The purpose of this paper is to develop a mathematical solution to estimate the deformation pattern and required power in cold plate rolling using coupled stream function method and upper bound theorem. Design/methodology/approach – In the first place, an admissible velocity field and the geometry of deformation zone are derived from a new stream function. Then, the optimum velocity field is obtained by minimizing the corresponding power function. Also, to calculate the adiabatic heating during high speed rolling operations, a two-dimensional conduction-convection problem is sequentially coupled with the mechanical model. To verify the predictions, rolling experiments on aluminum plates are conducted and also, a finite element analysis is performed by Abaqus/Explicit. The predicted deformation zone is then compared with the experimentally measured region as well as with the results of the finite element analysis. Findings – The results show that the predicted deformation zone and the temperature distribution fit reasonably with the experimental data while much lower computational cost needs comparing to the fully finite element analysis. Originality/value – A new stream function is proposed to properly describe the velocity field and deformation pattern during plate rolling considering the neutral point. Furthermore, the employed algorithm can be simply coupled with the thermal finite element analysis.

The Finite Element Analysis of Reducing Diameter of Centrifuge Pipe Mould by Hot Extrusion Process

2012 ◽  
Vol 538-541 ◽  
pp. 576-579
Author(s):  
Jing Long Fan
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Hot Extrusion ◽  
Extrusion Process ◽  
The Other ◽  
Element Analysis ◽  
Extrusion Processing ◽  
The Finite Element Analysis ◽  
3D Deformation ◽  
Thermal Extrusion

In this paper, based on elastic-plastic and thermal-stress coupling finite element method (FEM), the centrifuge pipe mould was molded by Pro/E, and imported into the MARC after meshing, and performed finite element analysis to extrusion stability and the process of hot extrusion by MARC. By summarizing the 3D deformation regulation of the hot extrusion centrifuge pipe mould, the stress changing and mechanical property parameters during the process of hot extrusion , providing reference for the design of equipment in radial hot extrusion. At last, the study could be useful for the device design of radial hot extrusion of the centrifuge pipe mould. At the same time, this method could be use to analyze the other relative thermal extrusion processing.

Upper-bound finite-element analysis of axisymmetric problems using a mesh adaptive strategy

2018 ◽  
Vol 102 ◽  
pp. 148-154 ◽  
Author(s):  
Jian Zhang ◽  
Yufeng Gao ◽  
Tugen Feng ◽  
Junsheng Yang ◽  
Feng Yang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Upper Bound ◽  
Adaptive Strategy ◽  
Element Analysis ◽  
Axisymmetric Problems
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