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http://dx.doi.org/10.5228/KSPP.2003.12.8.710

Development of Finite Element Program for Analyzing Springback Phenomena of Non-Isothermal Forming Processes for Aluminum Alloy Sheets (Part2 : Theory & Analysis)  

R.H. Wagoner (MSE, OSU)
Publication Information
Transactions of Materials Processing / v.12, no.8, 2003 , pp. 710-717 More about this Journal
Abstract
The implicit, finite element analysis program for analyzing the springback in the warm forming process of aluminum alloy sheets was developed. For the description of planar anisotropy in warm forming temperatures, Barlat's yield function is employed, and the power law type constitutive equation is used in terms of working temperatures for the depiction of work hardening in high temperatures. Also, Jetture's 4-node shell elements are introduced for reflecting the mechanical behavior of aluminum alloy sheet and the non-steady heat balance equations are solved for considering heat gain and loss during the forming process. For the springback evaluation, Newton-Raphson iteration method is introduced for overcoming the geometric nonlinearlity problem. In order to verify the validity of the FEM program developed, the stretching bending and springback processes are simulated. Though springback analysis results are slightly bigger than experimental ones, they have the same trend of the decreasing springback as the forming temperature increases.
Keywords
Springback; Non-isothermal Sheet Metal Forming Aluminum Alloy Sheets; Implicit FEM; Barlat′s Anisotropy Yield;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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