Strain Analysis of Sheet Metal Forming Parts by Inverse Finite Element Method Considering the Tooling Effects

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Hajian, Masoud | 2008

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 39359 (08)
University: Sharif University of Technology
Department: Mechanical Engineering
Advisor(s): Assempour, Ahmad
Abstract:
The purpose of this work is to introduce an inverse finite element tool for prediction of the blank geometry and forming severity in stamping of 3D sheet metal parts. To achieve this goal total deformation theory of plasticity has been employed. In this method the final 3D part is unfolded on the flat surface and therefore the problem is reduced to two dimensional computations. Some tooling effects including blank holder force, bending and unbending and effect of draw bead are also considered. To investigate the capability of this work, predictions of the blank shape and strain distribution and forming severity have been performed on two circular and square parts. The results have been compared with some published experimental data and the results obtained by other commercial software
Keywords:
Bending/Unbending ; Sheet Metal Forming ; Inverse Finite Element Method ; Strain Analysis ; Blank Holder ; Drow Bead