Establishment and Application of Forming Limit Diagram of Multi-Gauge Laser Tailor-Welded Blanks

Wei Chen; S. Cheng; Y. Ding; Y.Q. Guo; L. Xue

doi:10.4028/www.scientific.net/AMR.97-101.420

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 97-101Establishment and Application of Forming Limit...

Establishment and Application of Forming Limit Diagram of Multi-Gauge Laser Tailor-Welded Blanks

Abstract:

The method for establishing the forming limit diagram (FLD) of multi-gauge high strength steel laser tailor-welded blanks (LTWB) is introduced based on analyzing the failure mechanism of multi-gauge LTWB. The Nakazima test is performed to generate the limit strain of multi-gauge high strength steel LTWB. By means of the ARGUS strain measuring system, the limit strain is measured and the FLD of LTWB is plotted subsequently. The FLD established by the Nakazima test is introduced into the FEA forming process as the failure criteria. Compared with the predicted result of the FLD of thinner metal, better correlation between the simulation and experimental results is indicated by adopting the FLD of LTWB as the necking criteria, which also reveals the validity and practicability of the FLD research method for multi-gauge high strength steel LTWB.

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Periodical:

Advanced Materials Research (Volumes 97-101)

Pages:

420-425

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.97-101.420

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Online since:

March 2010

Authors:

Wei Chen, S. Cheng, Y. Ding, Y.Q. Guo, L. Xue

Keywords:

Forming Limit Diagram (FLD), High Strength Steel Sheet, Laser Tailor-Welded Blank (LTWB)

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