EFFECT OF SPRINGBACK IN DP980 ADVANCED HIGH STRENGTH STEEL ON PRODUCT PRECISION IN BENDING PROCESS

Authors

  • Hung Thai Le School of Materials Science and Engineering, Hanoi University of Science and Technology
  • Kien Trung Le School of Mechanical Engineering, Hanoi University of Science and Technology
  • Dinh Thi Vu School of Materials Science and Engineering, Hanoi University of Science and Technology
  • Phuong Thi Doan School of Materials Science and Engineering, Hanoi University of Science and Technology

DOI:

https://doi.org/10.12776/ams.v25i3.1306

Keywords:

Springback, advanced high strength steel (AHSS), DP980

Abstract

Springback is a common phenomenon in sheet metal forming, in which the material undergoes an elastic recovery as applied loads are removed. Springback causes the forming shape to deviate from the intended design geometry. This phenomenon, which can be influenced by several factors, effects on both bending angle and bending curvature. The aim of this study is to determine the influence of different tool radius and the gap between punch and die on springback in bending of DP980 Advanced High-Strength Steels (AHSS) sheet. Experimental studies are combined with FEM method in commercial ABAQUS software to determine the bending angle after springback. To predict springback in bending process, the material properties are defined by Ludwik - Hollomon law, combined with the Hill’48 criterion. Experimental results are in good agreement with numerical simulations in case of bending in the rolling direction.

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Published

2019-09-25