Effects of Sheet Metal Curvature and Number of Forming Stages in Strain Distribution on 3D Stamped Part with Inverse Finite Element Method

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Dor Mohammadi, Saber | 2009

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 39165 (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 in one step and on predefined surface in multistage analysis. The problem for one step analysis is reduced to two dimensional computations. The effect of curvature of initial blank and the number of stages in forming process 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:
Stamping ; Inverse Finite Element Method ; Sheet Initial Curvature ; Multistep Analysis

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