Design modification in a multi-stage rectangular cup drawing process with a large aspect ratio by an elasto-plastic finite element analysis

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Finite element analysis of multi-stage deep drawing processes is carried out fur the process design of rectangular cup drawing with a large aspect ratio. The analysis incorporates shell elements for an elasto-plastic finite element method with an explicit time integration scheme using LS-DYNA3D. Simulation is performed for thorough investigation of failures such as tearing and wrinkling during the forming process. The analysis reveals that the difference of the drawing ratio within the cross-section produces non-uniform metal flow to cause wrinkling and severe extension. The irregular contact condition between the blank and the die also induces non-uniform metal flow. This paper identifies such an unfavorable mechanism in rectangular cup drawing and proposes a modification guideline in the design of the process and the tool shape. The analysis result confirms that the modified design not only improves the quality of a deep-drawn product but also reduces the possibility of failure. (C) 2001 Elsevier Science B.V. All rights reserved.
Publisher
ELSEVIER SCIENCE SA
Issue Date
2001-06
Language
English
Article Type
Article; Proceedings Paper
Citation

JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, v.113, no.1-3, pp.766 - 773

ISSN
0924-0136
DOI
10.1016/S0924-0136(01)00659-8
URI
http://hdl.handle.net/10203/19374
Appears in Collection
ME-Journal Papers(저널논문)
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