S-Space College of Engineering/Engineering Practice School (공과대학/대학원) Dept. of Material Science and Engineering (재료공학부) Journal Papers (저널논문_재료공학부)
Plane Stress Yield Function for Aluminum Alloy Sheets- Part II: FE Formulation and its Implementation
- Yoon, Jeong-Whan; Kang, Tae Jin; Chung, Kwansoo; Barlat, Frederic; Dick, Robert E.
- Issue Date
- Int. J. Plasticity 20 (2004), 495
- Planar anisotropy; Finite element method; Earing prediction; Yield function; Yield function
- A recently proposed plane stress yield function [Yld2000-2d; Int. J. Plasticity 19 (2003)
1297—part I of this work] that well describes the anisotropic behavior of aluminum alloy
sheets was implemented in a finite element code. A short review of the Yld2000-2d relevant
features was provided and the complete formulation for the yield function implementation
was proposed for its convenient use. Yield surface shapes, yield stress and r-value directionalities
predicted with Yld2000-2d for Al–5 wt.% Mg and 6016-T4 alloy sheet samples were
compared with those of previously suggested yield functions. Simulations of the cup drawing
process for the Al–Mg binary sheet were performed to compute the cup height profiles (earing
profiles) with different yield functions. The predicted profiles were compared to experimental
data and it was shown that the simulation using Yld2000-2d led to the best agreement
between theoretical and experimental results. The drawing and redrawing processes of a circular
cup using the NUMISHEET’99 (Gelin, J.C., Picart, P., 1999. In: Gelin, J.C., Picart, P.
(Eds.), Proceedings of NUMISHEET’99, Vol. 2. 13–17 September, Besancon, France) conference
geometry and specifications for a 6111-T4 aluminum alloy sheet sample were alsosimulated. The predicted load-punch displacement curves and sheet thickness profiles along
different radial directions of the cup were shown to be in excellent agreement with experimental
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