Numerical Simulation Of Steel Plate Bending Process Using Stationary Laser Beam By A Coupled Finite Element Thermal Mechanical Analysis

2008 ◽  
Author(s):  
Karim Kheloufi ◽  
El Hachemi Amara ◽  
El-Hachemi Amara ◽  
Saïd Boudjemai ◽  
Djamila Doumaz
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Laser Beam ◽  
Steel Plate ◽  
Mechanical Analysis ◽  
Plate Bending ◽  
Bending Process ◽  
Thermal Mechanical Analysis

An Electromagnetic and Thermo-Mechanical Analysis of High Frequency Induction Heating for Steel Plate Bending

2006 ◽  
Vol 326-328 ◽  
pp. 1283-1286 ◽  
Author(s):  
Jang Hyun Lee ◽  
Kyung Ho Lee ◽  
Jong Sung Yun
Keyword(s):  
Electromagnetic Field ◽  
Induction Heating ◽  
Eddy Currents ◽  
Steel Plate ◽  
Local Heating ◽  
Mechanical Analysis ◽  
Plate Bending ◽  
Heating Equipment ◽  
Process Comparison ◽  
Thermal Mechanical Analysis

Eddy currents of electromagnetic field leads not only to the local heating of plate but also to the thermal-elasto-plastic deformation in the induction heating. It is necessary to have a simulation model to attract the possibility of induction heating equipment and to study the deformation behavior. The goal of present paper is to investigate the possibility of induction heating equipment for steel plate bending. The residual stress distribution of induction heating is investigated by an electromagnetic analysis in conjunction with thermal-mechanical analysis. A computational model based on FEA is used to study the electromagnetic field and thermalmechanical process. Comparison with the residual strain fields and deformation of both heating shows that the induction heating has good similarity with the gas heating.

Finite Element Simulation Modelling for Laser Irradiated Bending Process of DP980 Steel

2012 ◽  
Vol 538-541 ◽  
pp. 1878-1882
Author(s):  
Jung Han Song ◽  
Jong Sup Lee ◽  
Geun An Lee ◽  
Sung Jun Park
Keyword(s):  
Finite Element ◽  
Laser Beam ◽  
Simulation Modelling ◽  
Mechanical Analysis ◽  
Temperature Fields ◽  
Laser Forming ◽  
Transient Temperature ◽  
Forming Mechanism ◽  
Element Simulation ◽  
Thermal Mechanical Analysis

Laser forming involves heating sheet metal workpiece along a certain path with a defocused laser beam directed irradiate to the surface. During laser forming, a transient temperature fields is caused by the irradiation and travelling of a laser beam. Consequently, thermal expansion and contraction take place, and allows the thermal-mechanical forming of complex shapes. This is a new manufacturing technique that forming metal sheet only by thermal stress. Therefore, the analysis of temperature fields and stress fields are very useful for studying the forming mechanism and controlling the accuracy of laser forming. The non-liner finite element solver, ABAQUS, is employed to solve the thermal-mechanical analysis. Using this model, the temperature and stress distribution of DP980 are analyzed. Numerical results agree well with the experimental results.

Numerical Simulation of Plate Bender Bending Process

2011 ◽  
Vol 189-193 ◽  
pp. 2228-2232
Author(s):  
Xue Jiang Liu ◽  
Hai Sheng Liu ◽  
Jing Liu ◽  
Hui Gang Wang
Keyword(s):  
Numerical Simulation ◽  
Stress Distribution ◽  
Mechanical Behavior ◽  
Process Optimization ◽  
Plate Bending ◽  
Bending Process

The plate’s mechanical behavior of three-roller plate bending machine had been analyzed in case of upper roller feeding based on ANSYS. Strain and stress distribution of the plate and its changes are gained. The influence of upper roller’s feeding location and bending velocity to bending process are researched. The results are valuable to bending process optimization and practical technique of plate bending.

Research on Thermal Mechanical Properties of Rubber Like Materials Based on Numerical Simulation

2011 ◽  
Vol 704-705 ◽  
pp. 811-816
Author(s):  
Jian Bin Sang ◽  
Wen Ying Yu ◽  
Bo Liu ◽  
Xiao Lei Li ◽  
Tie Feng Liu
Keyword(s):  
Finite Element ◽  
Energy Function ◽  
Strain Energy ◽  
Strain Energy Function ◽  
Mechanical Analysis ◽  
Nonlinear Finite Element ◽  
Uniaxial Tensile ◽  
Uniaxial Tensile Test ◽  
Rubber Seal ◽  
Thermal Mechanical Analysis

This paper start with a discussion on various types of strain energy functions of rubber like materials. Theoretical analysis based on the strain energy function given in by Y.C.Gao in 1997 is proposed. The material parameters of strain energy function were curve-fitted from the uniaxial tensile test. The selected constitutive relation of rubber like materials was implemented into a finite element code MSC.Marc as a user material subroutine to analyze the thermal and mechanical behavior of rubber seal under the plane strain conditions. Contact force and distribution of the contact stress between lip seal and shaft are analyzed and coupled thermal mechanical analysis of rubber seal was proposed. The contact pressure distribution is readily obtainable from the nonlinear finite element analysis and the coupled thermal mechanical analyses results indicate that the thermal stress only have minor influence on the deformed shape of rubber seal, which will be a useful technique for predicting the properties of rubber seal and providing reference for engineering design. Keywords:rubber like materials, nonlinear finite element, contact analysis, thermal mechanical analysis

Numerical Simulation of the Four-Roll Bending Process for 2.25Cr-1Mo-0.25V Thick-Plate at Elevated Temperature

2017 ◽  
Author(s):  
Yafei Wang ◽  
Guangxu Cheng ◽  
Zaoxiao Zhang ◽  
Yun Li ◽  
Jianxiao Zhang
Keyword(s):  
Numerical Simulation ◽  
Elevated Temperature ◽  
Plate Thickness ◽  
Strain Curve ◽  
High Temperature Deformation ◽  
Temperature Deformation ◽  
Plate Bending ◽  
Stress Strain ◽  
Explicit Finite Element ◽  
Bending Process

In this paper, the four-roll plate bending process of 2.25Cr-1Mo-0.25V steel at elevated temperature is investigated by numerical simulation. This 3-D simulation is finished by using the elastic-plastic dynamic explicit finite element method (FEM) under the ANSYS/LS-DYNA environment. The strain softening behavior of 2.25Cr-1Mo-0.25V steel at elevated temperature is presented and discussed. The stress-strain relationship of the steel plate is modeled using a piecewise linear material model, with the stress-strain curve obtained through tensile tests. The plate bending process with a plate thickness of 150 mm is investigated. The amount and position of maximum plastic deformation are analyzed. The present study provides an important basis for the optimization of bending parameters and further investigation of the effect of high-temperature deformation on the resistance to hydrogen attack of 2.25Cr-1Mo-0.25V steel.

Numerical Simulation on Spiral Hot Bending Process for End Sheet of Tubular Pile

2012 ◽  
Vol 562-564 ◽  
pp. 1373-1376
Author(s):  
Shi Min Xu ◽  
Hua Gui Huang ◽  
Deng Yue Sun
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Radial Direction ◽  
Three Dimensional ◽  
Element Model ◽  
Manufacturing Method ◽  
Forming Technology ◽  
Bending Process ◽  
Simulation Results ◽  
The Moment

A new manufacturing method of spiral hot bending process for the end sheet of tubular pile was introduced in this paper. A three-dimensional (3-D) thermal-mechanical coupled elastic-plasticity finite element model was setup to simulate the hot bending process, and then, the section deformation mechanism from hot bar by rolling to the end sheet has been investigated from the simulation results. The industry manufacture conditions show that the efficiency and quality has been highly improved by the spiral hot bending process. The thickness variety along the radial direction of the workpiece has also been analyzed, the moment and force during the hot bending was also presented in this paper. These conclusions obtained can guide for the forming technology making for both the end sheet of tubular pile and other ring parts.

Numerical Simulation of Stretch Bending Process and Springback for T Section Aluminum Extrusions

2006 ◽  
Vol 315-316 ◽  
pp. 416-420
Author(s):  
Ming He Chen ◽  
Lin Gao ◽  
H.H. Mao ◽  
Dun Wen Zuo ◽  
Min Wang
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Element Model ◽  
Major Effect ◽  
Experimental Results ◽  
Spring Back ◽  
Stretch Bending ◽  
Aluminum Extrusions ◽  
Bending Process ◽  
Forming Precision

In order to improve the forming precision of the stretch bending process for T section aluminum extrusions and meet the fine forming requirement of the aerostat blank parts, the elongation controlled stretch bending process finite element model is proposed, which is based on the basic principle of the stretch bending forming with respect to A-7B CNC Section Stretch Wrap Forming Machine by analyzing various factors that influence the qualities of stretch bending parts, and the numerical simulation of the stretch bending process and spring back for T section aluminum extrusions is carried out. The results of simulation show that the pre-stretching elongation has a major effect on stretch bending parts and finite post-stretching elongation helps to improve the forming qualities of the parts. Comparing with the experimental results, the spring back of the finite element simulation shows good agreement with that of the experimental results.

Application of Finite Element Method to Crack Prediction in Laser Cladding Process

2012 ◽  
Vol 197 ◽  
pp. 372-375
Author(s):  
Nan Hai Hao ◽  
Zi Xing Qin
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Laser Cladding ◽  
Mechanical Analysis ◽  
Tension Stress ◽  
Laser Cladding Process ◽  
Clad Layer ◽  
The Moment ◽  
Thermal Mechanical Analysis ◽  
Element Method

The cracks in clad layer are the most often defects in laser cladding of low ductility materials. This paper reports the efforts of crack prediction with finite element method. The process is modeled with commercial FEM software package ANSYS and the thermal-mechanical analysis is performed to inquire the strain-stress variation during cladding, especially the variation around the moment of solidification. The analysis result shows that, by the end of cladding, the clad layer is in tension stress and the stress values are varied in directions. The tension stress along the cladding direction is the maximum one, which causes the cracking in clayed layer. Increasing the preheating temperature of substrate is an effective way to avoid the crack generation.

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