A new mechanical parameter, Springback Index (SBI), is proposed to reflect the magnitude of sheet-metal springback at a given flow stress level. Through conducting Tension-Unloading-Reloading (TUR) tests and measuring the Effective Unloading Modulus (EUM) Parameter, which is defined as the ratio of the non-linear recovery vs. total recovery, SBI can be determined for the sheet metal after complex forming processes.To verify this SBI approach, U-free bending tests are conducted with galvanized and galvannealed DP600 sheet steels. The results indicate that the determination of SBI is remarkably simplified and the accuracy of springback prediction is significantly improved.


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    Title :

    Springback Determination By Springback Index Approach


    Additional title:

    Sae Technical Papers


    Contributors:
    Ma, Hongwei (author) / Sun, Shuwen (author) / Wang, Zhirui (author)

    Conference:

    SAE 2005 World Congress & Exhibition ; 2005



    Publication date :

    2005-04-11




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English


    Keywords :


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