Estimation of Springback in Sheet Metal Stamping Using Inverse Finite Element Method

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Marzban, Bahador | 2012

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 43412 (08)
University: Sharif University of Technology
Department: Mechanical Engineering
Advisor(s): Asempour, Ahmad
Abstract:
This work presents a quick method in estimation of spring back effect in sheet metal forming. In this method, the so called Inverse Finite Element Method (IFEM) has been adopted for compution of strains and also blank shape. Although the of element used is membrane, the effect of bending/ unbendiing is considered by addition of some extra forces as the bending forces to the nodal forces. The results of strain distribution obtained by IFEM are applied to another algorithm developed for computation of the spring back . this algorithm has been developed for the sections with plane starin assumption. Therefore, spring back of longitudinal parts, can be estimated by this method in a short time. using this method, the results of springback calculation in U-channel and S-Rail have been compared with those obtained by ABAQUS. Good agreement was found between the results.
Keywords:
Deep Drawing ; Sheet Metal Forming ; Spring Back ; Metal Sheets ; Inverse Finite Element Method

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