A Finite Element Approach to Transient Thermal Analysis of Work Rolls in Rolling Process

2000 ◽  
Vol 122 (4) ◽  
pp. 706-716 ◽  
Author(s):  
James D. Lee ◽  
Majid T. Manzari ◽  
Yin-Lin Shen ◽  
Wenjun Zeng
Keyword(s):  
Finite Element ◽  
Three Dimensional ◽  
Thermal Characteristics ◽  
Rolling Process ◽  
Time Varying ◽  
Thermal Problem ◽  
Temperature Variations ◽  
Element Approach ◽  
Transient Thermal ◽  
Work Rolls

The three-dimensional transient thermal problem of work rolls in the entire rolling process has been formulated. It includes the time-varying boundary conditions specified at the roll surface taking the schedule of both rolling and idling cycles into consideration. The corresponding finite element equations are derived and solved by the Runge-Kutta-Verner method. The finite element solutions indicate that the temperature variations in the circumferential direction are overwhelming. Case studies unveil the thermal characteristics of the work rolls in various kinds of mill operations. The effects of the specific heat and the angular velocity of the work rolls are presented. Numerical results are compared with Guo’s analytical solutions. [S1087-1357(00)01604-X]

Finite Element Analysis of Transient Thermal Problems of Work Rolls in Hot Rolling Process

1999 ◽  
Author(s):  
James D. Lee ◽  
Majid T. Manzari ◽  
Yin-Lin Shen ◽  
Wenjun Zeng
Keyword(s):  
Finite Element ◽  
Hot Rolling ◽  
Three Dimensional ◽  
Thermal Characteristics ◽  
Rolling Process ◽  
Thermal Problem ◽  
Element Analysis ◽  
Hot Rolling Process ◽  
Transient Thermal ◽  
Work Rolls

Abstract The three-dimensional transient thermal problem of work rolls in the entire hot rolling process has been formulated. It includes the time-varying boundary conditions specified at the roll surface taking the schedule of both rolling and idling cycles into consideration. The corresponding finite element equations are derived and solved by the Runge-Kutta-Verner method. The finite element solutions indicate that the temperature variations in the circumferential direction are overwhelming. Case studies unveil the thermal characteristics of the work rolls in various kinds of mill operations. Numerical results are presented and compared with Guo’s analytical solutions.

Modelling and Simulation of Radial Ring Rolling Process Based on Finite Element Analyses

2013 ◽  
Author(s):  
Zhengkun Feng ◽  
Henri Champliaud
Keyword(s):  
Finite Element ◽  
Three Dimensional ◽  
Dynamic Contact ◽  
Rolling Process ◽  
Ring Rolling ◽  
Contact Boundary ◽  
Explicit Finite Element ◽  
Complex Process ◽  
Element Approach ◽  
Ring Rolling Process

Ring rolling is widely used to produce seamless rings for critical structural components in assembly industries, such as machinery, aeronautics, energy and automotive. The complex process is characterized by high nonlinearity, unsteady and asymmetrical three-dimensional deformation, dynamic contact boundary conditions caused by the rotations of ring and rolls. A numerical model based on dynamic explicit finite element approach is proposed in this paper to simulate the process behaviors. An expanded ring has been obtained by numerical simulations with the model. Strain and stress analyses have been performed on the rolled ring.

scholarly journals Transient Thermal Analysis of NH000 gG 100A Fuse Link Employing Finite Element Method

Energies ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1421
Author(s):  
Michał Szulborski ◽  
Sebastian Łapczyński ◽  
Łukasz Kolimas ◽  
Łukasz Kozarek ◽  
Desire Dauphin Rasolomampionona ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Ceramic Body ◽  
Three Dimensional ◽  
Operating Mode ◽  
Power Losses ◽  
Empirical Tests ◽  
Transient Thermal ◽  
Different Parts ◽  
Element Method

In this paper, a detailed three-dimensional, transient, finite element method of fuse link NH000 gG 100 A is proposed. The thermal properties during the operation of the fuses under nominal (100 A) and custom conditions (110 and 120 A) are the main focus of the analyses that were conducted. The work concerns both the outside elements of the fuse link (ceramic body) and the elements inside (current circuit). Both the distribution of the electric current and its impact on the temperature of the construction parts of the fuses during their operating mode have been described. Temperature distribution, power losses and energy dissipation were measured using a numerical model. In order to verify and validate the model, two independent teams of scientists executed experimental research, during which the temperature was measured on different parts of the device involving the rated current. Finally, the two sets of results were put together and compared with those obtained from the simulation tests. A possible significant correlation between the results of the empirical tests and the simulation work was highlighted.

Finite Element Analysis of Load Capacity on Coupling Clamps for Pipe

2012 ◽  
Vol 201-202 ◽  
pp. 741-744 ◽  
Author(s):  
Zhen Ning Hou ◽  
Jun Wu ◽  
Qing Wang ◽  
Hong Gen Tian ◽  
Nan Chao ◽  
...  
Keyword(s):  
Finite Element ◽  
Stress Intensity ◽  
Optimization Design ◽  
Load Capacity ◽  
Three Dimensional ◽  
Process Conditions ◽  
Fe Model ◽  
Three Dimensional Model ◽  
Element Analysis ◽  
Element Approach

A finite element approach based on Ansys is developed to simulate stress intensity distribution in a three dimensional model of coupling clamp joint, which includes ferrules, pipe caps and bolts. The characteristics of stress intensity distributions of coupling clamp joint under strength pressure loading have been studied by means of the non-linear finite element method. The FE model can also predict the clamp quality and tolerances to be expected under different process conditions and define the most effective process parameters to influence the tolerances. The study could give us a better understanding on the mechanism and basis for optimization design of the coupling clamp joint.

Computing Flatness Defects in Sheet Rolling by Arlequin and Asymptotic Numerical Methods

2014 ◽  
Vol 611-612 ◽  
pp. 186-193 ◽  
Author(s):  
Kekeli Kpogan ◽  
Yendoubouam Tampango ◽  
Hamid Zahrouni ◽  
Michel Potier-Ferry ◽  
Hachmi Ben Dhia
Keyword(s):  
Finite Element ◽  
Residual Stresses ◽  
Numerical Technique ◽  
Three Dimensional ◽  
Nonlinear Problems ◽  
Rolling Process ◽  
Three Dimensional Model ◽  
Sheet Rolling ◽  
Arlequin Method ◽  
Roll Bite

Rolling of thin sheets generally induces flatness defects due to thermo-elastic deformation of rolls. This leads to heterogeneous plastic deformations throughout the strip width and then to out of plane displacements to relax residual stresses. In this work we present a new numerical technique to model the buckling phenomena under residual stresses induced by rolling process. This technique consists in coupling two finite element models: the first one consists in a three dimensional model based on 8-node tri-linear hexahedron which is used to model the three dimensional behaviour of the sheet in the roll bite; we introduce in this model, residual stresses from a full simulation of rolling (a plane-strain elastoplastic finite element model) or from an analytical profile. The second model is based on a shell formulation well adapted to large displacements and rotations; it will be used to compute buckling of the strip out of the roll bite. We propose to couple these two models by using Arlequin method. The originality of the proposed algorithm is that in the context of Arlequin method, the coupling area varies during the rolling process. Furthermore we use the asymptotic numerical method (ANM) to perform the buckling computations taking into account geometrical nonlinearities in the shell model. This technique allows one to solve nonlinear problems using high order algorithms well adapted to problems in the presence of instabilities. The proposed algorithm is applied to some rolling cases where “edges-waves” and “center-waves” defects of the sheet are observed.

Three-dimensional thermo-mechanical finite element simulation of the vertical–horizontal rolling process

2001 ◽  
Vol 110 (1) ◽  
pp. 89-97 ◽  
Author(s):  
Xiong Shangwu ◽  
Liu Xianghua ◽  
Wang Guodong ◽  
P.A.F. Martins ◽  
Jiao Sihai ◽  
...  
Keyword(s):  
Finite Element ◽  
Finite Element Simulation ◽  
Three Dimensional ◽  
Rolling Process ◽  
Element Simulation

A Finite Element Computer Model for the Application of Electrokinetics to Contaminated Land

2003 ◽  
Author(s):  
Simon Kwong ◽  
Alan Paulley ◽  
Alex Bond
Keyword(s):  
Finite Element ◽  
Chemical Speciation ◽  
Three Dimensional ◽  
Computer Code ◽  
Test Cases ◽  
Coupled Flow ◽  
Lagrangian Transport ◽  
Chemical Gradients ◽  
Flow Transport ◽  
Element Approach

The computer code TRAFFIC incorporating three-dimensional (3-D) electrokinetic capabilities, coupled flow, transport and chemical speciation, using a finite element approach has been used to replicate published laboratory scale experiments [1, 2]. Two test cases have been presented using TRAFFIC with chemical speciation options and the Euler-Lagrangian transport formulation. The first of these (Case A with graphite anode) provided useful insights into the capabilities of the code to simulate realistic and complex problems, while the second (Case B with iron anode) closely reproduced the experimental results. It was also shown that the Euler-Lagrangian transport scheme was much better in coping with the steep chemical gradients, whereas the standard Euler scheme is less stable. Given the good results of these test cases, it is concluded that the code has been verified and partially validated.

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