Volume 22, Issue 1 (January 2021)
Modares Mechanical Engineering 2021, 22(1): 23-35 |
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Gholamzadeh E, Panahizadeh V, Hoseinpour M, Alizad-Kaman M. Experimental and theoretical study of formability behavior of Aluminum alloy 5083 sheet for determination of advanced anisotropic yield criteria coefficient and prediction of forming limit diagram. Modares Mechanical Engineering 2021; 22 (1) :23-35
URL: http://mme.modares.ac.ir/article-15-52712-en.html
URL: http://mme.modares.ac.ir/article-15-52712-en.html
1- Shahid Rajaee Teacher Training University, Lavizan, Tehran
2- Shahid Rajaee Teacher Training University, Lavizan, Tehran, Iran ,v.panahizadeh@sru.ac.ir
3- Shahid Rajaee Teacher Training University, Lavizan, Tehran, Iran
4- Amirkabir University, Tehran, Iran
2- Shahid Rajaee Teacher Training University, Lavizan, Tehran, Iran ,
3- Shahid Rajaee Teacher Training University, Lavizan, Tehran, Iran
4- Amirkabir University, Tehran, Iran
Abstract: (2472 Views)
Forming limit diagrams (FLDs) are very important in predicting the behavior of the sheet. Therefore, predicting and drawing these diagrams by theoretical and experimental methods has been one of the main objectives of this paper. In this paper, the formability behavior of 5083 aluminum sheet was investigated by considering the strain hardening behavior. Tensile tests has performed in seven directions 0°, 15°, 30°, 45°, 60°, 75° and 90° from the rolling direction due to identify and calibrate coefficients of BBC2008 advanced yield criteria. The yield stresses was defined in the plane strain mode, also the anisotropy coefficients and the appropriate error function were extracted; Then the relationships of the plane strain yield stress were added to the error function. The error function was optimized using Genetic Algorithm and limit strains were calculated using yield coefficients. The results showed that if the strain hardening exponent increases by 0.1, the limit strains increase by 30 to 40%. Also the results showed that the initial imperfection factor ( 
) has a great effect on determining the FLD and with a very small change, it has a great effect on the FLD; So that by increasing this factor to about 0.016, the values of the limit strains are almost doubled. Using the results of this paper and having sheet properties such as yield strengths and anisotropy coefficients and proper selection of yield criteria, the FLD of different sheets to be theoretically determined with acceptable accuracy.
) has a great effect on determining the FLD and with a very small change, it has a great effect on the FLD; So that by increasing this factor to about 0.016, the values of the limit strains are almost doubled. Using the results of this paper and having sheet properties such as yield strengths and anisotropy coefficients and proper selection of yield criteria, the FLD of different sheets to be theoretically determined with acceptable accuracy.
Keywords: Forming Limit Diagram, Al 5083, BBC2008 Advanced Yield Criteria, Optimization, Plane Strain Tensile Test.
Article Type: Original Research |
Subject:
Forming of metal sheets
Received: 2021/05/20 | Accepted: 2021/08/12 | Published: 2021/12/31
Received: 2021/05/20 | Accepted: 2021/08/12 | Published: 2021/12/31
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