The Effect of Temperature on Formability of AA6061-T6 Alloy Material Under Stretching Operation

2019 ◽  
Author(s):  
R. Raman Goud ◽  
Aryan Rachala
Keyword(s):  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
Effect Of Temperature ◽  
Forming Process ◽  
Element Analysis ◽  
Alloy Material ◽  
The Finite Element Analysis ◽  
Different Temperatures ◽  
Metal Forming Process

Abstract Forming process is one of the most promising techniques in sheet metal forming process in which flat sheet is converted into desired component. Formability analysis has to be carried out in order to obtain successful forming components. In this paper the effect of temperature on formability of AA6061-T6 alloy material was estimated by conducting stretch forming operations on one mm AA6061-T6 alloy material sheets at different temperatures. The range of specimen sizes wastaken from 110 mm × 20 mm to 110 mm × 110mm of AA6061-T6 alloy material for experimentation. The experiments were conducted on the sheet metal forming setupat temperatures RT (250C), 1000C and 2000C.The obtained results were compared with the finite element analysis. The data extracted by the simulation results was well matched with the experimentation results.

Influence of the Adaptive Remeshing during Simulations of Sheet Metal Forming Processes

2011 ◽  
Vol 473 ◽  
pp. 691-698
Author(s):  
Laurence Giraud-Moreau ◽  
Abel Cherouat ◽  
Houman Borouchaki
Keyword(s):  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
Forming Process ◽  
Mesh Distortion ◽  
Element Analysis ◽  
Physical Size ◽  
Adaptive Remeshing ◽  
The Finite Element Analysis ◽  
Metal Forming Process

In this work, an adaptive remeshing scheme is presented in order to simulate with accuracy sheet metal forming processes. During simulations of metal forming processes, large plastic deformations with ductile damage occur and severe mesh distortion takes place after a few incremental steps. Hence frequent remeshing of the part must be performed in order to carry out the finite element analysis. The necessary steps to remesh the damaged structure during the simulation of the sheet metal forming process are given. The adaptive remeshing based on refinement and coarsening techniques, is controlled by geometrical and physical size maps. This remeshing strategy has been coupled with a projection method in order to avoid problems of contact between the part and the rigid tools. The influence of the remeshing is studied on numerical examples which show the capacity of the proposed procedure.

On Applying Kriging Approximate Optimization to Sheet Metal Forming

2011 ◽  
Vol 63-64 ◽  
pp. 3-7
Author(s):  
Yan Min Xie
Keyword(s):  
Sheet Metal ◽  
Process Parameters ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
Nonlinear Function ◽  
Kriging Model ◽  
Engineering Problem ◽  
Forming Process ◽  
Element Analysis ◽  
Metal Forming Process

This paper presents a methodology to effectively determine the optimal process parameters using finite element analysis (FEA) and design of experiments (DOE) based on Metamodels. The idea is to establish an approximation function relationship between quality objectives and process parameters to alleviate the expensive computational expense in the optimization iterations for the sheet metal forming process. This paper investigated the Kriging metamodel approach. In order to prove accuracy and efficiency of Kriging method, the nonlinear function as test functions is implemented. At the same time, the practical nonlinear engineering problems such as square drawing are also optimized successfully by proposed method. The results prove Kriging model is an effective method for nonlinear engineering problem in practice.

scholarly journals Experimental And Theoretical Determination Of Forming Limit Curve

2015 ◽  
Vol 60 (3) ◽  
pp. 1881-1886
Author(s):  
J. Adamus ◽  
K. Dyja ◽  
M. Motyka
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
Fracture Initiation ◽  
Forming Limit ◽  
Forming Process ◽  
Element Analysis ◽  
Metal Forming Process

Abstract The paper presents a method for determining forming limit curves based on a combination of experiments with finite element analysis. In the experiment a set of 6 samples with different geometries underwent plastic deformation in stretch forming till the appearance of fracture. The heights of the stamped parts at fracture moment were measured. The sheet - metal forming process for each sample was numerically simulated using Finite Element Analysis (FEA). The values of the calculated plastic strains at the moment when the simulated cup reaches the height of the real cup at fracture initiation were marked on the FLC. FLCs for stainless steel sheets: ASM 5504, 5596 and 5599 have been determined. The resultant FLCs are then used in the numerical simulations of sheet - metal forming. A comparison between the strains in the numerically simulated drawn - parts and limit strains gives the information if the sheet - metal forming process was designed properly.

Studies on the Processes Design of Multi-Step Sheet Metal Forming

2010 ◽  
Vol 146-147 ◽  
pp. 1855-1858
Author(s):  
Wei Chen ◽  
Ming Yan Wu ◽  
Zhong Fu Huang ◽  
Yi Ding ◽  
Feng Ze Dai
Keyword(s):  
Finite Element Analysis ◽  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
Strain Path ◽  
Forming Process ◽  
Element Analysis ◽  
Design Rules ◽  
Forming Quality ◽  
Metal Forming Process

It is well known that the design of multi-step sheet metal forming process is rather difficult. Even small errors may cause significant quality problem. In recent years, finite element analysis (FEA) has being considered as an essential tool for the design. Using a commercial FEA package, DYNAFORM, this paper studies the design of multi-step sheet metal forming processes, especially on how the design of the intermediate steps affect the forming quality. For a rectangle box with a rectangle protrusion inside, several different forming schemes are investigated by means of FEA. The study reveals that the strain path plays an important role. Accordingly, a couple of design rules are suggested.

Further Development of Sheet Metal Forming Analysis Method

1987 ◽  
Vol 109 (4) ◽  
pp. 330-337 ◽  
Author(s):  
S. A. Majlessi ◽  
D. Lee
Keyword(s):  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
Numerical Procedure ◽  
Type Model ◽  
Analysis Method ◽  
Forming Process ◽  
Element Analysis ◽  
Metal Forming Process ◽  
Time Required

The finite element analysis procedure used to model the sheet metal forming process is further developed by incorporating a refined numerical procedure and an improved metal-tool friction analysis method. The shell-type model is capable of closely approximating the strain distribution of prescribed axisymmetric parts. Further refinements on the numerical procedure have resulted in the marked decrease of the time required to reach a convergence of solutions. At the same time, frictional conditions at the metal-die and metal-punch interfaces have been closely characterized by applying equilibrium conditions in an iterative manner. Effects of these improved procedures have been examined in detail by making a systematic sensitivity analysis and by comparing the analytical results against experimental data. Based on these results, a critical assessment of the simplified analysis method is made.

scholarly journals Laser Welding of High-strength Aluminium Alloys for the Sheet Metal Forming Process

Procedia CIRP ◽  
2014 ◽  
Vol 18 ◽  
pp. 203-208 ◽  
Author(s):  
J. Enz ◽  
S. Riekehr ◽  
V. Ventzke ◽  
N. Sotirov ◽  
N. Kashaev
Keyword(s):  
Laser Welding ◽  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
Aluminium Alloys ◽  
High Strength ◽  
Forming Process ◽  
Metal Forming Process
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