Online Arithmetic by Fast Finite Element in Strip Rolling

2009 ◽  
Vol 45 (06) ◽  
pp. 193
Author(s):  
Changsheng LI
Keyword(s):  
Finite Element ◽  
Strip Rolling ◽  
Online Arithmetic

A fast rigid-plastic finite element method for online application in strip rolling

2010 ◽  
Vol 46 (12) ◽  
pp. 1146-1154 ◽  
Author(s):  
S.H. Zhang ◽  
G.L. Zhang ◽  
J.S. Liu ◽  
C.S. Li ◽  
R.B. Mei
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Strip Rolling ◽  
Rigid Plastic ◽  
Online Application ◽  
Element Method

A Fast Three-Dimensional Model for Strip Rolling

2016 ◽  
Vol 716 ◽  
pp. 566-578 ◽  
Author(s):  
Christian Overhagen ◽  
Paul Josef Mauk
Keyword(s):  
Finite Element ◽  
Stress Gradient ◽  
Three Dimensional ◽  
Significant Loss ◽  
Three Dimensions ◽  
Beam Model ◽  
Stress Distributions ◽  
Three Dimensional Model ◽  
Strip Rolling ◽  
Lateral Direction

Rolling Models have come a long way from the first empirical relations about forward slip and bite conditions to their current state, which allows local quantities to be calculated in two and three dimensions. In this paper, state-of-the-art of analytical modelling of the rolling process is shown with a fully three-dimensional rolling model for hot and cold strip rolling with stress distributions in the longitudinal, vertical and lateral directions. For this purpose, von Karman’s strip approach is extended to account for the stress gradient in lateral direction, as was already shown in different papers. The stress gradient in the vertical (through-thickness) direction is introduced by a modern implementation of Orowan’s inhomogeneous deformation theory. The local stress distributions are compared to results from Finite-Element Calculations obtained with modern FEM codes. It will be shown, under which circumstances expensive FEM calculations can be replaced by simpler models like the one proposed here, which are more time and cost-effective without a significant loss in result precision. The rolling model is extended with a Finite Element Beam Model for work and backup roll deformation, as well as local work roll flattening and thermal crown for hot rolling. The Effects of those features on stress distribution and exit strip profile are shown for hot and cold rolling.

Solution of Singularity Points in Strip Rolling by Rigid Plasticity Finite Element Method

2010 ◽  
Vol 97-101 ◽  
pp. 219-226
Author(s):  
Chang Sheng Li ◽  
Rui Bin Mei ◽  
Xiang Hua Liu
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Slip Velocity ◽  
Velocity Model ◽  
Iteration Step ◽  
Parabolic Model ◽  
Strip Rolling ◽  
Relative Slip ◽  
Singularity Point ◽  
Element Method

The concept of the first and the second singularity point was introduced in the paper. The singularity points would lead to the iteration divergence in the solution of rolling by rigid plasticity finite element method. Double velocity model and parabolic model of relative slip velocity were proposed for solution of the first and the second singularity point respectively. The influence of the models to improve the effects of singularity point on calculating time and iteration step was discussed according to the practical strip rolling condition. The results showed that for the element numbers from 200 to 2000, the iteration step and total calculating time was reduced about 8~67% by the double velocity model in the same condition compared to normal model for the solution of first singularity point. The iteration step and calculating time was reduced about 15~61% with the parabolic model of relative slip velocity. The double velocity model and parabolic model of relative slip velocity could be used to improve the convergence and increase efficiency of the solution in strip rolling by rigid plasticity finite element method.

Discussion on Finite Element Model for Three Dimensional Rolling Process Analysis

2014 ◽  
Vol 496-500 ◽  
pp. 452-455
Author(s):  
Chi Chih Shen
Keyword(s):  
Heat Transfer ◽  
Numerical Simulation ◽  
Finite Element ◽  
Theoretical Model ◽  
Process Analysis ◽  
Three Dimensional ◽  
Element Model ◽  
Rolling Process ◽  
Strip Rolling ◽  
Rigid Matrix

A three dimensional numerical simulation model of metal rolling formation is developed from the theoretical model. In this theoretical model, the two variables of element deformation and temperature variation are placed in a variable matrix. The thermal elastic plastic rigid matrix and heat transfer rigid matrix are placed in the same expansion rigid matrix. Furthermore, the numerical simulation analytical model developed in this paper was used to simulate aluminum strip rolling.

scholarly journals Comprehensive Analysis of Metal Deformation Law Based on Numerical Simulation of Cold Rolling Process

2020 ◽  
Author(s):  
Zhu-Wen Yan ◽  
Bao-Sheng Wang ◽  
He-Nan Bu ◽  
Hao Li ◽  
Lei Hong ◽  
...  
Keyword(s):  
Finite Element ◽  
Cold Rolling ◽  
Finite Element Model ◽  
Equivalent Stress ◽  
Element Model ◽  
Work Roll ◽  
Rolling Process ◽  
Efficiency Coefficient ◽  
Strip Rolling ◽  
Research Results

Abstract Through taking the cold rolling process as the research object, the three-dimensional finite element model of the strip rolling process is established by using ANSYS/LS-DYNA software. The simulation results of the finite element model have a good fit with the actual production data. The rolling process is dynamically simulated, and the distribution curves of important rolling parameters such as equivalent stress, control efficiency coefficient, transverse rolling pressure, lateral thickness and work roll deflection is obtained. The research results of this paper have strong practicability for the process control of cold strip rolling mill. The research results have certain guiding significance for the development and optimization of the rolling control system.

Finite Element Analysis of Temperatures, Metal Flow, and Roll Pressure in Hot Strip Rolling

1993 ◽  
Vol 115 (3) ◽  
pp. 290-298 ◽  
Author(s):  
S. M. Hwang ◽  
M. S. Joun ◽  
Y. H. Kang
Keyword(s):  
Finite Element ◽  
Temperature Field ◽  
Metal Flow ◽  
Flow Characteristics ◽  
Hot Strip Rolling ◽  
Strip Rolling ◽  
Element Analysis ◽  
Speed Reduction ◽  
Roll Pressure ◽  
Hot Strip

This paper presents a new approach for the analysis of hot strip rolling processes. The approach is based on the finite element method and capable of predicting velocity field in the strip, temperature field in the strip, temperature field in the roll, and roll pressure. Basic finite element formulations are described with emphasis on modeling roll pressure and friction at the roll-strip interface and on treating the numerical instability resulting from a standard Galerkin formulation. Comparison with the theoretical solutions found in the literature is made to evaluate the accuracy of the temperature solutions. An iterative scheme is developed for dealing with strong correlations between the metal flow characteristics and thermal behavior of the roll-strip system. A series of process simulations are carried out to investigate the effect of various process parameters including interface friction, interface heat transfer coefficient, roll speed, reduction in thickness, and spray zone. The results are shown and discussed.

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