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Title: Forming Limit Predictions for the Serrated Strain Paths in Single Point Incremental Sheet Forming

Abstract

The forming limits of sheets subjected to the Single Point Incremental Forming process (SPIF) is generally several times higher than those found in the Forming Limit Curve (FLC). In this paper it is shown that the non-monotonic, serrated strain paths to which the material is subjected to during the SPIF process, play a role in the high formability, compared to the monotonic loading in the traditional FLC. The deformation history of an aluminium alloy truncated cone formed with the SPIF process is retrieved through a finite element (FE) model, and discussed. Subsequently, the strain paths at three different depths in the sheet are used as input into a Marciniak-Kuczynski (MK) forming limit model. The usage of different constitutive models in this analysis shows that anisotropic hardening contributes to the delay of the onset of necking in the SPIF process. The large difference in the predicted forming limits that were obtained from the different layers indicates that an interaction between these layers should be taken into account for more accurate forming limit predictions of sheets subjected to the SPIF process.

Authors:
; ;  [1];  [1];  [2];  [3]
  1. MTM, Katholieke Universiteit Leuven, Kasteelpark Arenberg 44, B-3001 Heverlee (Belgium)
  2. (Belgium)
  3. PMA, Katholieke Universiteit Leuven, Celestijnenlaan 300 B, B-3001 Heverlee (Belgium)
Publication Date:
OSTI Identifier:
21057365
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 908; Journal Issue: 1; Conference: NUMIFORM '07: 9. international conference on numerical methods in industrial forming processes, Porto (Portugal), 17-21 Jun 2007; Other Information: DOI: 10.1063/1.2740802; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALUMINIUM ALLOYS; ANISOTROPY; DEFORMATION; FINITE ELEMENT METHOD; HARDENING; LAYERS; LOADING; MATERIALS WORKING; SHEETS; STRAINS

Citation Formats

Eyckens, P., He, S., Van Houtte, P., Bael, A. van, IWT, Katholieke Hogeschool Limburg, Campus Diepenbeek, Agoralaan Gebouw B, bus 3, B-3590 Diepenbeek, and Duflou, J.. Forming Limit Predictions for the Serrated Strain Paths in Single Point Incremental Sheet Forming. United States: N. p., 2007. Web. doi:10.1063/1.2740802.
Eyckens, P., He, S., Van Houtte, P., Bael, A. van, IWT, Katholieke Hogeschool Limburg, Campus Diepenbeek, Agoralaan Gebouw B, bus 3, B-3590 Diepenbeek, & Duflou, J.. Forming Limit Predictions for the Serrated Strain Paths in Single Point Incremental Sheet Forming. United States. doi:10.1063/1.2740802.
Eyckens, P., He, S., Van Houtte, P., Bael, A. van, IWT, Katholieke Hogeschool Limburg, Campus Diepenbeek, Agoralaan Gebouw B, bus 3, B-3590 Diepenbeek, and Duflou, J.. Thu . "Forming Limit Predictions for the Serrated Strain Paths in Single Point Incremental Sheet Forming". United States. doi:10.1063/1.2740802.
@article{osti_21057365,
title = {Forming Limit Predictions for the Serrated Strain Paths in Single Point Incremental Sheet Forming},
author = {Eyckens, P. and He, S. and Van Houtte, P. and Bael, A. van and IWT, Katholieke Hogeschool Limburg, Campus Diepenbeek, Agoralaan Gebouw B, bus 3, B-3590 Diepenbeek and Duflou, J.},
abstractNote = {The forming limits of sheets subjected to the Single Point Incremental Forming process (SPIF) is generally several times higher than those found in the Forming Limit Curve (FLC). In this paper it is shown that the non-monotonic, serrated strain paths to which the material is subjected to during the SPIF process, play a role in the high formability, compared to the monotonic loading in the traditional FLC. The deformation history of an aluminium alloy truncated cone formed with the SPIF process is retrieved through a finite element (FE) model, and discussed. Subsequently, the strain paths at three different depths in the sheet are used as input into a Marciniak-Kuczynski (MK) forming limit model. The usage of different constitutive models in this analysis shows that anisotropic hardening contributes to the delay of the onset of necking in the SPIF process. The large difference in the predicted forming limits that were obtained from the different layers indicates that an interaction between these layers should be taken into account for more accurate forming limit predictions of sheets subjected to the SPIF process.},
doi = {10.1063/1.2740802},
journal = {AIP Conference Proceedings},
number = 1,
volume = 908,
place = {United States},
year = {Thu May 17 00:00:00 EDT 2007},
month = {Thu May 17 00:00:00 EDT 2007}
}