Numerical Simulation of Bending Angle on Geometric Accuracy of AZ31 Mg Alloy Profile during Warm Bending Process

2012 ◽  
Vol 482-484 ◽  
pp. 314-317
Author(s):  
Han Xiao ◽  
Yu Chun Dang ◽  
Shi Hong Zhang ◽  
De Hong Lu
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Finite Element Model ◽  
Cross Section ◽  
Element Model ◽  
Mg Alloy ◽  
Geometric Accuracy ◽  
Bending Angle ◽  
Az31 Mg Alloy ◽  
Bending Process

A 3D elastic-plastic thermo-mechanical coupled finite element model of AZ31 Mg alloy profile during warm bending process was established. The effect of bending angle on the geometric accuracy of the profile was investigated. The results indicate that with increasing bending angle, the springback angles increase from 7.56° to 8.27°; the bending radii decrease from 90.15 mm to 90.01 mm; the cross-section distortion of the bent profile increases.

Effect of Temperature on Geometric Accuracy of AZ31 Profile during Warm Pre-Tension Rotation Bending

2011 ◽  
Vol 299-300 ◽  
pp. 432-435
Author(s):  
Han Xiao ◽  
Shi Hong Zhang ◽  
Jin Song Liu
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Cross Section ◽  
Element Model ◽  
Effect Of Temperature ◽  
Geometric Accuracy ◽  
Elastic Plastic ◽  
Bending Process ◽  
Forming Temperature ◽  
The Cross

A warm pre-tension rotation bending process is presented to bend the AZ31 profile. A 3D elastic-plastic thermo-mechanical coupled finite element model is established to investigate the effect of forming temperature on the geometric accuracy of the profile. The results indicate that with increasing forming temperature, the springback angles decrease from 8.37° to 7.2°; the bending radii decrease from 90.69 mm to 89.67 mm; the cross-section distortion of the bent profile increases.

Numerical and experimental study on rotary draw bending of aluminium alloy tubes

2011 ◽  
Vol 2 (1) ◽  
pp. 33-38 ◽  
Author(s):  
L. Lăzărescu
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Aluminium Alloy ◽  
Cross Section ◽  
Angular Position ◽  
Element Model ◽  
Quality Parameters ◽  
Wall Thinning ◽  
Bending Process ◽  
Bending Radius

Abstract In this paper a 3D finite element model of the bending process for circular aluminium alloy tube has been built using the explicit code eta/Dynaform and validated by comparing the experiments. The experiments were carried out by using a hand bender with the same bending principle as a rotary draw numerical controlled (NC) bender. The relationship between quality parameters of bent tubes, in terms of cross-section distortion and wall thinning, and the angular position along the bent tube is discussed experimentally in combination with FE simulation. Then, the effects of bending radius (R) are investigated using simulation of the bending process based on the finite element model. The results show that with the increase of bending radius, the cross-section degradation factor (Ψ) and wall thinning degree (ξ) decreases rapidly.

Numerical Simulation of Stress-Strain of AZ31 Mg Alloy Profile during Warm Tension-Rotation Bending Process

2013 ◽  
Vol 690-693 ◽  
pp. 2379-2382
Author(s):  
Han Xiao ◽  
Long Biao Wu
Keyword(s):  
Numerical Simulation ◽  
Plastic Strain ◽  
Tangential Stress ◽  
Cross Section ◽  
Equivalent Plastic Strain ◽  
Mg Alloy ◽  
Stress Strain ◽  
Az31 Mg Alloy ◽  
Bending Process ◽  
Distribution Of Stress

The warm tension-rotation bending process of AZ31 Mg alloy profile was simulated. The distribution of stress and equivalent plastic strain of the profile during the bending process were analyzed. The results indicate that tangential stress of cross-section of profile from the inside to outside after bending is shown as "tensile-compression-tensile-compression", which is appeared as "N"-shaped. Equivalent plastic strain of the outside of profile is maximum, which is 0.132; the inside of profile is lower, which is 0.069; the middle of profile is minimum, which is 0.003.

Numerical Simulation of the Effects of Preheating on Electron Beam Additive Manufactured Ti-6Al-4V Build Plate

2016 ◽  
Vol 879 ◽  
pp. 274-278 ◽  
Author(s):  
Jun Cao ◽  
Philip Nash
Keyword(s):  
Numerical Simulation ◽  
Residual Stress ◽  
Finite Element ◽  
Electron Beam ◽  
Cross Section ◽  
Element Model ◽  
Normal Direction ◽  
Thermal Residual Stresses ◽  
Longitudinal Residual Stress ◽  
Middle Cross Section

In an earlier study, a 3-D thermomechanical coupled finite element model was built and experimentally validated to investigate the evolution of the thermal residual stresses and distortions in electron beam additive manufactured Ti-6Al-4V build plates. In this study, an investigation using this robust and accurate model was focused on an efficient preheating method, in which the electron beam quickly scanned across the substrate to preheat the build plate prior to the deposition. Various preheat times, beam powers, scan rates, scanning paths and cooling times (between the end of current preheat scan/deposition layer and the beginning of the next preheat scan/deposition layer) were examined, and the maximum distortion along the centerline of the substrate and the maximum longitudinal residual stress along the normal direction on the middle cross-section of the build plate were quantitatively compared. The results show that increasing preheat times and beam powers could effectively reduce both distortion and residual stress for multiple layers/passes components.

Numerical Simulation of Steel Grid Structure under High Temperature

2013 ◽  
Vol 838-841 ◽  
pp. 458-461
Author(s):  
Jing Cui ◽  
Ling Feng Yin ◽  
Xiao Ming Guo ◽  
Gan Tang ◽  
Tian Jiao Jin
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
High Temperature ◽  
Finite Element Model ◽  
Numerical Method ◽  
Nonlinear Interaction ◽  
Element Model ◽  
Fire Tests ◽  
Grid Structure ◽  
Test Models

Based on the fire tests of WILLIAMS double-poles structure, considering the dual nonlinear interaction of material and geometric, established one complete finite element model of grid structure. For the performance that the physical and mechanics properties of steel will degrade while the temperature arising, simulate the test models with ANSYS, get a better numerical results, proof the numerical method is feasible.

Support-Condition Analyses of Rotating Beams Under Distributed Imbalance Loading

2011 ◽  
Author(s):  
Kai Jokinen ◽  
Erno Keskinen ◽  
Marko Jorkama ◽  
Wolfgang Seemann
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Cross Section ◽  
Cross Sections ◽  
Natural Frequencies ◽  
Element Model ◽  
Mode Shapes ◽  
Constant Cross Section ◽  
Support Condition ◽  
Beam Elements

In roll balancing the behaviour of the roll can be studied either experimentally with trial weights or, if the roll dimensions are known, analytically by forming a model of the roll to solve response to imbalance. Essential focus in roll balancing is to find the correct amount and placing for the balancing mass or masses. If this selection is done analytically the roll model used in calculations has significant effect to the balancing result. In this paper three different analytic methods are compared. In first method the mode shapes of the roll are defined piece wisely. The roll is divided in to five parts having different cross sections, two shafts, two roll ends and a shell tube of the roll. Two boundary conditions are found for both supports of the roll and four combining equations are written to the interfaces of different roll parts. Totally 20 equations are established to solve the natural frequencies and to form the mode shapes of the non-uniform roll. In second model the flexibility of shafts and the stiffness of the roll ends are added to the support stiffness as serial springs and the roll is modelled as a one flexibly supported beam having constant cross section. Finally the responses to imbalance of previous models are compared to finite element model using beam elements. Benefits and limitations of each three model are then discussed.

Numerical Simulation and Process Research for Cylindrical Drawing

2010 ◽  
Vol 20-23 ◽  
pp. 1405-1408 ◽  
Author(s):  
Wei Hua Kuang ◽  
Qun Liu
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Finite Element Model ◽  
Element Model ◽  
Process Research ◽  
Die Design ◽  
Drawing Process ◽  
3D Finite Element ◽  
Simulation Results ◽  
Distribution Of Stress

Drawing process is an important technology in shaping products. In the paper, the geometric surfaces of tools and sheet were modeled by Pro/E software, and a 3D finite element model of the cylindrical drawing process was developed by DYNAFORM. Numerical simulation results showed the distribution of stress, strain and thickness. FLD showed no material was in crack area and risk crack area. The drawing process could be successfully completed in one stroke. The simulation results were helpful for the die design.

Sign in / Sign up

Export Citation Format

Share Document