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Experimental and Numerical Investigations of a Split-Ring Test for Springback

[+] Author Affiliations
Z. Cedric Xia, Craig E. Miller, Feng Ren

Ford Motor Company

Paper No. IMECE2005-79384, pp. 259-266; 8 pages
doi:10.1115/IMECE2005-79384
From:
  • ASME 2005 International Mechanical Engineering Congress and Exposition
  • Manufacturing Engineering and Materials Handling, Parts A and B
  • Orlando, Florida, USA, November 5 – 11, 2005
  • Conference Sponsors: Manufacturing Engineering Division and Materials Handling Division
  • ISBN: 0-7918-4223-1 | eISBN: 0-7918-3769-6
  • Copyright © 2005 by ASME

abstract

This paper presents an in-depth experimental and numerical investigation of a split-ring test, which provides a simple yet effective benchmark for correlating forming and springback predictive capabilities with experimental measurements. The experimental procedure consists of deep drawing a circular 6111-T4 aluminum alloy into a cylindrical cup of 55mm depth, cross-cutting 9 rings of 5mm each from the cup, splitting the rings and measuring their opening displacement, i.e. the springback amount. Experimental data obtained included punch force trajectories, drawn cup profile, thickness distribution after forming, and the ring openings after splitting. A numerical model is built to analyze the process, and both transversely-isotropic and fully-orthotropic yield criteria are investigated. Simulation results are validated against experimental data. A detailed numerical analysis is also conducted for stress distributions in each ring after each step and their relationship to springback amount. Stress and strain signatures suggested that the test is well suited for validating material models such as anisotropic yield surface models and hardening models.

Copyright © 2005 by ASME

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