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Numerical modeling and analysis for forming process of dual-phase 980 steel exposed to infrared local heating

Lee, Eun-Ho, Yang, Dong-Yol, Yoon, Jeong Whan and Yang, Woo-Ho 2015, Numerical modeling and analysis for forming process of dual-phase 980 steel exposed to infrared local heating, International journal of solids and structures, vol. 75-76, pp. 211-224, doi: 10.1016/j.ijsolstr.2015.08.014.

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Title Numerical modeling and analysis for forming process of dual-phase 980 steel exposed to infrared local heating
Author(s) Lee, Eun-Ho
Yang, Dong-Yol
Yoon, Jeong WhanORCID iD for Yoon, Jeong Whan
Yang, Woo-Ho
Journal name International journal of solids and structures
Volume number 75-76
Start page 211
End page 224
Total pages 14
Publisher Elsevier
Place of publication Amsterdam, The Netherlands
Publication date 2015-06-08
ISSN 0020-7683
Keyword(s) Dual-phase 980 steel
Infrared local heating
Residual stress
Thermo-mechanical behavior
Summary A recent experiment confirmed that the infrared (IR) local heating method drastically reduces springback of dual-phase (DP) 980 sheets. In the experiment, only the plastic deformation zone of the sheets was locally heated using condensed IR heating. The heated sheets were then deformed by V-bending or 2D-draw bending. Although the experimental observation proved the merit of using the IR local heating to reduce springback, numerical modeling has not been reported. Numerical modeling has been required to predict springback and improve the understanding of the forming process. This paper presents a numerical modeling for V-bending and 2D-draw bending of DP 980 sheets exposed to the IR local heating with the finite element method (FEM). For describing the thermo-mechanical behavior of the DP 980 sheet, a flow stress model which includes a function of temperature and effective plastic strain was newly implemented into Euler-backward stress integration method. The numerical analysis shows that the IR local heating reduces the level of stress in the deformation zone, although it heats only the limited areas, and then it reduces the springback. The simulation also provides a support that the local heating method has an advantage of shape accuracy over the method to heat the material as a whole in V-bending. The simulated results of the springback in both V-bending and 2D-draw bending also show good predictions.
Language eng
DOI 10.1016/j.ijsolstr.2015.08.014
Field of Research 091207 Metals and Alloy Materials
Socio Economic Objective 970109 Expanding Knowledge in Engineering
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2015, Elsevier
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Document type: Journal Article
Collection: School of Engineering
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Created: Wed, 07 Oct 2015, 11:03:35 EST

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