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Influence of Weld Characteristics on Numerically Predicted Deformation Behavior of Aluminum Tailor Welded Blanks
ISSN: 0148-7191, e-ISSN: 2688-3627
Published March 04, 2002 by SAE International in United States
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The automotive industry is continuously investigating means for producing lighter-weight vehicles in order to improve fuel efficiency and reduce emissions. Lightweight materials, such as aluminum, are often used to replace steel in automotive body structures, such as hoods, decklids, fenders, and their corresponding reinforcements. To further reduce weight and improve stiffness, sheets of different gages and/or properties are welded together prior to stamping to form “tailored” blanks. The presence of the weld and the gage mismatch in these blanks, often result in premature failure, which can be expressed as a shift in the forming limit diagram. Several process variables affect this change in deformation behavior including the welding process used to join the blanks, the weld orientation, the weld geometry, and the mechanical properties of the weld and the base materials.
Developing an understanding of the deformation behavior of tailor-welded blanks has been the focus of many studies. However, to improve computational efficiency, researchers have, in general, ignored the weld line geometry and properties when modeling tailor-welded blank forming, even though different welding techniques produce welds with different widths, profiles, and properties. Therefore, this paper discusses the results of investigating the effects of weld material properties and weld geometry on deformation behavior in the vicinity of the weld line, and describes the different approaches that were used to represent the weld geometry. The findings indicate that if material behavior near the weld line is required, then shell element models are insufficient and models including weld material properties and/or weld geometry should be used.
CitationBhagwan, A., Kridli, G., and Friedman, P., "Influence of Weld Characteristics on Numerically Predicted Deformation Behavior of Aluminum Tailor Welded Blanks," SAE Technical Paper 2002-01-0386, 2002, https://doi.org/10.4271/2002-01-0386.
- Davies, R. Grant, G. Smith, M. Oliver, E. 2000 “Formability and Fatigue of Aluminum Tailor-Welded Blanks,” SAE Paper No. 2000-01-2664
- Kinsley, B. Zhihong, L Cao, J. 1999 “New Apparatus for Forming Tailor Welded Blanks,” SAE Paper No. 1999-01-0681
- Saunders, F.I. Wagoner, R.H. 1996 “Forming of Tailor-Welded Blanks,” Metallurgical and Materials Transactions A 27A 2605 2616
- Zhao, K.M. Chun, B.K. Lee, J.K. 2001 “Finite Element Analysis of tailor Welded blanks,” Finite Elements in Analysis and Design 37 2 117 130
- Heo, Y. Choi, Y. Kim, H.Y. Seo, D. 2001 Characteristics of Weld Line Movements for the Deep Drawing with Drawbeads of Tailor-Welded Blanks,” Journal of Materials Processing Technology 111 1-3 164 169
- Buste, A. Lalbin, X. Worswick, M.J. Clarke, J.A. Altshuller, B. Finn, M. Jain, M. 2000 “Prediction of Strain Distribution in Aluminum Tailor Welded Blanks for Different Welding Techniques,” Canadian Metallurgical Quarterly 39 4 493 502
- Kridli, G.T. Friedman, P.A. Sherman, A.M. 2000 “Formability of Aluminum Tailor-Welded Blanks,” SAE Paper No. 2000-01-0772
- LS-DYNA version 950 Keyword User's Manual
- Friedman, P.A. Kridli, G.T. 2000 “Microstructural and Mechanical Investigation of Aluminum Tailor Welded Blanks,” Journal of Materials Engineering and Performance 9 5 541 551