Prediction of plastic instability and forming limits in sheet metal forming

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Date

2011

Authors

Kaftanoğlu, Bilgin
Kaftanoglu,B.

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Manufacturing Engineering
(2003)
Opened in 2003 with the aim to graduate experts in the field of machine-production, our Department is among the firsts in our country to offer education in English. The Manufacturing Engineering program focuses on the manufacturing technologies that shape materials from raw materials to final products by means of analytical, experimental and numerical modeling methods. First Manufacturing Engineering Program to be engineered by Müdek, our department aims to graduate creative and innovative Manufacturing Engineers that are knowledgeable in the current technology, and are able to use production resources in an effective and sustainable way that never disregards environmental facts. As the first Department to implement the Cooperative Education Program at Atılım University in coordination with institutions from the industry, the Manufacturing Engineering offers a practice-oriented approach in education with its laboratory infrastructure and research opportunities. The curriculum at our department is supported by current engineering software, and catered to creating engineers equipped to meet the needs of the production industry.

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Abstract

In this study, FLD's are predicted by simulating Nakazima test using a finite element software. Strain propagation instability criterion is used to evaluate the limit strains from the finite element simulations. SAE 1006, material is used in this study and 7 different specimen geometries are analyzed. Furthermore, FLD's are also predicted by theoretical approaches namely; Keeler's model, maximum load instability criterion, Swift-Hill model and Storen-Rice model. At the end of the study, the calculated FLD's are compared with the experimental results. © 2011 IBF (RWTH Aachen) & IUL (TU Dortmund).

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Keywords

Finite element method, Forming limit diagram, Nakazima test, Sheet metal forming, Strain propagation

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Proceedings of the 10th International Conference on Technology of Plasticity, ICTP 2011 -- 10th International Conference on Technology of Plasticity, ICTP 2011 -- 25 September 2011 through 30 September 2011 -- Aachen -- 104184

Volume

Issue

Start Page

927

End Page

932

URI

https://hdl.handle.net/20.500.14411/9305

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