FE-analysis of sheet metal forming processes using continuous contact treatment

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Discrete meshes cause stepwise propagation of the contact nodes of a sheet despite the fact that the contact region in the actual forming process is altered very smoothly. This can cause problems of convergence and accuracy in contact-sensitive processes, such as a bending process. In this study, a scheme for a continuous contact treatment is proposed in order to consider the more realistic behavior of the contact phenomena during the forming process. For verification of the proposed method, the contact pressures and forming load are evaluated during the compression forming of a tube. The analysis of a hemispherical dome formed without a blank holder is also presented in order to investigate the effects of the proposed algorithm. The results show that the precise deformation mode is predicted by the utilization of the proposed method. (c) 2006 Elsevier Ltd. All rights reserved.
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Issue Date
2007-03
Language
English
Article Type
Article; Proceedings Paper
Keywords

FINITE-ELEMENT FORMULATION; ALUMINUM-ALLOY SHEETS; STRESS YIELD FUNCTION; PLANE-STRESS; IMPACT; ANISOTROPY; ALGORITHM; BEHAVIOR; PART

Citation

INTERNATIONAL JOURNAL OF PLASTICITY, v.23, no.3, pp.544 - 560

ISSN
0749-6419
URI
http://hdl.handle.net/10203/2351
Appears in Collection
ME-Journal Papers(저널논문)
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