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Numerical Simulation on Formability of Tailor-Welded Blank with Curved Weld-Line Under Different Blank Holder Forces

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As a new material to manufacture the automotive parts, tailor-welded blank (TWB) can offer several notable benefits, including decreased weight of the whole car, reduced fuel consumption, improved strength and stiffness of the automobile body. TWB with curved weld-line is widely used in the automotive field and the study on its formability is of great significance for the actual production. The forming processes of TWB box part were simulated by Dynaform, a finite element analysis software. And the simulations were carried out under different blank holder forces (BHFs). Weld-line movement, wrinkling and the ratio of thinning were analyzed to evaluate the formability of TWB. Besides, some related analyses for the simulation results were carried out from some aspects, such as the stress distribution of TWB during the forming process. The results show that the weld-line at the bottom of the box part moves towards the thick blank while towards the thin blank at the flange. The distance of weld-line movement varies evidently when the BHFs on the two blanks change. In addition, the variation of the BHFs also has great influence on the wrinkling and the thinning rate during the forming process of TWB. At the bottom of the box part, Bulging deformation is easy to occur at the turning place of the curved weld-line. Therefore, setting the BHFs reasonably could effectively improve the formability of TWB.
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Keywords: BHFS; FORMABILITY; TWB WITH CURVED WELD-LINE; WELD-LINE MOVEMENT

Document Type: Research Article

Publication date: September 1, 2012

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  • Journal of Computational and Theoretical Nanoscience is an international peer-reviewed journal with a wide-ranging coverage, consolidates research activities in all aspects of computational and theoretical nanoscience into a single reference source. This journal offers scientists and engineers peer-reviewed research papers in all aspects of computational and theoretical nanoscience and nanotechnology in chemistry, physics, materials science, engineering and biology to publish original full papers and timely state-of-the-art reviews and short communications encompassing the fundamental and applied research.
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