A physically based constitutive framework is proposed in this paper for precision metal forming processes. Texture evolution plays a key role for both fully plastic anisotropy and the trigger of deformation bifurcation, which is believed as a bridge to link Rice's localization analysis with the M-K analysis for FLD (Forming Limit Diagram). Comparing with the finite element discretization of 3-D crystal orientations, the proposed analytical approach to texture evolution via ODF (Orientation Distribution Function) can reduce computational time tremendously, in addition to enforcing both numerical stability and accuracy. The constitutive framework has potential for the computer-aided simulation of metal forming processes such as springback predicition, FLD calculation, and optimal die design by implementing the framework in a commercial finite element code. A 2-D analysis of localization and forming limit is presented to illustrate the proposed approach.
Physically based constitutive framework for precision metal forming processes
Physikalisch basierter Rahmen für präzise Metallformprozesse
International Journal of Vehicle Design ; 21 , 4/5 Special Issue ; 491-509
1999
19 Seiten, 11 Bilder, 51 Quellen
Article (Journal)
English
Physically based constitutive framework for precision metal forming processes
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