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

2006 ◽  
pp. 416-420
Author(s):  
M.H. Chen ◽  
L. Gao ◽  
H.H. Mao ◽  
Dun Wen Zuo ◽  
Min Wang
Keyword(s):  
Numerical Simulation ◽  
Stretch Bending ◽  
Aluminum Extrusions ◽  
Bending Process

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.

scholarly journals Effect of Flexible 3D Multipoint Stretch Bending Dies on the Shape Accuracy and the Optimal Design

2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
Xiangfeng Lin ◽  
Yi Li ◽  
Zhongyi Cai ◽  
Jicai Liang ◽  
Ce Liang ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Surface Modification ◽  
Simulation Analysis ◽  
Shape Error ◽  
Shape Accuracy ◽  
Finite Element Software ◽  
Stretch Bending ◽  
Aluminum Profile ◽  
Die Surface ◽  
Bending Process

Aiming at the flexible 3D stretch bending with multipoint dies for the aluminum profile, the numerical simulation analysis of the bending process was carried out by ABAQUS finite element software. In the multipoint stretch bending (MPSB) process, the influence of the number of die units on the springback for the complex section profile was studied. The shape error between the forming parts and the target parts was reduced through the method of die surface modification. The results showed that the springback of the aluminum profile could reach a minimum when the number of die units was 25 under the precondition of saving cost and ensuring the quality of forming parts. In the numerical simulation, the maximum shape error of the forming parts reduced from 18.824 mm to 2.456 mm; in the test, the maximum shape error reduced from 27.26 mm to 6.03 mm through the method of die surface modification.

Numerical Simulation of a Stretch Bending Process

2009 ◽  
Vol 417-418 ◽  
pp. 637-640 ◽  
Author(s):  
Giuseppe Lamanna ◽  
Francesco Caputo ◽  
Luigi Grassia ◽  
Alberto D'Amore ◽  
Alessandro Soprano
Keyword(s):  
Numerical Simulation ◽  
Numerical Model ◽  
Residual Stresses ◽  
Boundary Conditions ◽  
Numerical Procedure ◽  
Material Behavior ◽  
Stretch Bending ◽  
Bending Process ◽  
Linear Material ◽  
Experimental Comparisons

There are several difficulties associated with the numerical simulation of the stretch bending process of extruded components; the main ones are non-linear material behavior, geometrical non-linearities, modeling of boundary conditions, contact between die and specimen, springback during the unloading phase. Another very complex aspect is the calibration of the numerical model, as rather few experimental results are generally available. This paper deals with a numerical simulation of a complete stretch bending process with the aim to select the most suitable numerical procedure oriented to the evaluation of the process-induced distortions and residual stresses; to validate the proposed procedure, numerical–experimental comparisons have been performed. The activities reported have been developed in collaboration with ALENIA Finmeccanica s.p.a. within the VI FP’s research project called COMPACT.

Numerical Simulation Of A Stretch Bending Process

2010 ◽  
pp. 253-268
Author(s):  
Giuseppe Lamanna ◽  
Francesco Caputo ◽  
Alberto D’Amore ◽  
Luigi Grassia ◽  
Vincenzo Ascione
Keyword(s):  
Numerical Simulation ◽  
Stretch Bending ◽  
Bending Process

Springback Simulation in Stretch Bending of Aluminum Extrusions Using Static Implicit and Dynamic Explicit FE Codes

2011 ◽  
Vol 295-297 ◽  
pp. 1606-1612
Author(s):  
Xiao Qiang Li ◽  
Hui Li ◽  
Dong Sheng Li
Keyword(s):  
Cross Sectional ◽  
Forming Simulation ◽  
Stretch Bending ◽  
Aluminum Extrusions ◽  
Bending Process

First stretch bending process of aluminium extrusions given by Norwegian scholars is simulated by using revised model proposed in the paper. That maximum die force calculated is closer to experiment than Norwegian scholars’ one demonstrates that the revised model is rather accurate in forming simulation and lays the foundation for later springback simulation. Then springback is simulated by using dynamic explicit and static implicit FE codes, respectively. The influences on cross-sectional distortion and springback of two codes are compared. It is shown that dynamic explicit FE code can predict cross-sectional distortion accurately and static implicit FE code overestimates it. Neither of two codes can predict springback accurately. Dynamic explicit FE code overestimates it and static implicit one FE code underestimates it.

Research on springback characteristic in flexible multi-points 3D stretch-bending process

2021 ◽  
pp. 095440542110284
Author(s):  
Song Gao ◽  
Tonggui He ◽  
Qihan Li ◽  
Yingli Sun ◽  
Jicai Liang
Keyword(s):  
Simulation Model ◽  
High Efficiency ◽  
Vertical Direction ◽  
Factors Affecting ◽  
Stretch Bending ◽  
Element Simulation ◽  
Bending Process ◽  
Bending Radius ◽  
Aluminum Profiles ◽  
Bending Sequence

The problem of springback is one of the most significant factors affecting the forming accuracy for aluminum 3D stretch-bending parts. In order to achieve high-efficiency and high-quality forming of such kind of structural components, the springback behaviors of the AA6082 aluminum profiles are investigated based on the flexible multi-points 3D stretch-bending process (3D FSB). Firstly, a finite element simulation model for the 3D FSB process was developed to analyze the forming procedure and the springback procedure. The forming experiments were carried out for the rectangle-section profile to verify the effectiveness of the simulation model. Secondly, the influence of tension on springback was studied, which include the pre-stretching and the post-stretching. Furthermore, the influences of the bending radius and bending sequence are revealed. The results show that: (1) The numerical model can be used to evaluate the effects of bending radius and process parameters on springback in the 3D FSB process effectively. (2) The pre-stretching has little effect on the horizontal springback reduction, but it plays a prominent role in reducing the springback in the vertical direction. (3) The increase of bending deformation in any direction will lead to an increase of springback in its direction and reduce the springback in the other direction. Besides, it reduces the relative error in both directions simultaneously. This research established a foundation to achieve the precise forming of the 3D stretch-bending parts with closed symmetrical cross-section.

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.

Sign in / Sign up

Export Citation Format

Share Document