A Constitutive Model of 6111-T4 Aluminum Alloy Sheet Based on the Warm Tensile Test

2013 ◽  
Vol 23 (3) ◽  
pp. 1107-1113 ◽  
Author(s):  
Lin Hua ◽  
Fanzhi Meng ◽  
Yanli Song ◽  
Jianing Liu ◽  
Xunpeng Qin ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Constitutive Model ◽  
Tensile Test ◽  
Alloy Sheet ◽  
Aluminum Alloy Sheet

Springback of Aluminum Alloy Sheet Metal and its Modeling

2014 ◽  
Vol 939 ◽  
pp. 361-366 ◽  
Author(s):  
Takeshi Uemori ◽  
Satoshi Sumikawa ◽  
Syohei Tamura ◽  
Tetsuo Naka ◽  
Fusahito Yoshida
Keyword(s):  
Experimental Data ◽  
Aluminum Alloy ◽  
Constitutive Model ◽  
Present Author ◽  
Present Model ◽  
Plastic Anisotropy ◽  
Alloy Sheet ◽  
Light Weight ◽  
Aluminum Alloy Sheet ◽  
Sheet Metals

Aluminum alloy sheet metals have been widely utilized for a light weight construction of automobile. However, Aluminum sheet metals still remain one of the difficult materials to predict the accurate final shapes after press forming processes, because of several mechanical weak features such as lower Youngs modulus, strong plastic anisotropy of yield stress, Lankford values, and so on. In order to solve the problems, the present author has developed a new constitutive model called Modified Yoshida-Uemori model. The present model can describe accurate non-proportional hardening behaviors of Aluminum alloy sheet metals. In the present research, several experimental procedures were carried out to reveal the mechanical properties of Aluminum alloy sheet metals. From the comparison between experimental data and the corresponding calculated results by our constitutive model, the performance of our model was evaluated. In addition to the above mentioned research, the evaluation of some springback analyses were also carried out. The calculated results show good agreements with the corresponding experimental data.

scholarly journals Forming limit curve determination of AA6061-T6 aluminum alloy sheet

2017 ◽  
Vol 20 (K2) ◽  
pp. 51-60
Author(s):  
Hao Huu Nguyen ◽  
Trung Ngoc Nguyen ◽  
Trung Ngoc Nguyen ◽  
Hoa Cong Vu
Keyword(s):  
Aluminum Alloy ◽  
Constitutive Model ◽  
Sheet Metal ◽  
Damage Model ◽  
Alloy Sheet ◽  
Analytical Models ◽  
Forming Limit ◽  
Aluminum Alloy Sheet ◽  
Limit Curve ◽  
Forming Limit Curve

The forming limit curve (FLC) is used in sheet metal forming analysis to determine the critical strain or stress values at which the sheet metal is failing when it is under the plastic deformation process, e.g. deep drawing process. In this paper, the FLC of the AA6061-T6 aluminum alloy sheet is predicted by using a micro-mechanistic constitutive model. The proposed constitutive model is implemented via a vectorized user-defined material subroutine (VUMAT) and integrated with finite element code in ABAQUS/Explicit software. The mechanical behavior of AA6061-T6 sheet is determined by the tensile tests. The material parameters of damage model are identified based on semi-experience method. To archive the various strain states, the numerical simulation is conducted for the Nakajima test and then the inverse parabolic fit technique that based on ISO 124004-2:2008 standrad is used to extracted the limit strain values. The numerical results are compared with the those of MK, Hill and Swift analytical models.

Annealing Effect for Cold Rolling 6016 Aluminum Alloy Sheet

2016 ◽  
Vol 723 ◽  
pp. 37-43
Author(s):  
Jiu Hui Li ◽  
Dong Ye He ◽  
Xuan Tao Zheng ◽  
Gao Liang Ding
Keyword(s):  
Aluminum Alloy ◽  
Cold Rolling ◽  
Tensile Test ◽  
Annealing Treatment ◽  
Alloy Sheet ◽  
Aluminum Alloy Sheet ◽  
Forming Process ◽  
Metal Forming Process ◽  
6016 Aluminum Alloy ◽  
Cylindrical Cup

In aluminum alloy sheet metal forming process, annealing treatment can improve the mechanical properties. The tensile test for different temperatures of 400°C, 450°C, 500°C, 550°C respectively have been carried out from 1h to 12h.The result revealed that the ductility increased with the increase of annealing temperature. It is found that the annealing treatment at 500°C for 6 h can get a good property. Furthermore, the result of tensile test showed that the yield strength increased from 130MPa before cold rolling to 190MPa after annealed, and the elongation of the sheet increased to 28.6%. The result of stamping test verified that the limiting draw ratio (LDR) increased after annealing treatment from 1.15 to 1.56. The value of blank holder force for the cylindrical cup is becoming smaller after the annealing treatment. The microstructure investigations on experimental aluminum alloys after long-time annealing and cold rolling conditions were presented. The changes of the main structural contituents have been obviously observed, which improved the formability of the alloys.

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