In order to evaluate the crash-worthiness of a car, the dynamic response of the car body has to be correctly obtained at each level of car velocity. For the dynamic analysis, the dynamic properties of auto-body materials need to be identified for various strain rates. One of the typical high strain rate tensile tests is a split Hopkinson bar test. The present experiment has been carried out with a new split Hopkinson bar apparatus specially designed for the dynamic tensile test of sheet metals. The experiment provides stress-strain curves for various strain rates ranged from 2500 to 5000/sec. The experimental results from the both quasi-static and dynamic test are used to construct the Johnson-Cook equation as a constitutive relation, which can be applied to simulate the dynamic behavior of auto-body structures.


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    Title :

    Identification of Dynamic Behavior of Sheet Metals for an Auto-Body with Tension Split Hopkinson Bar


    Additional title:

    Sae Technical Papers


    Contributors:
    Chung, D. T. (author) / Huh, H. (author) / Cho, S. S. (author) / Kang, W. J. (author)

    Conference:

    International Congress & Exposition ; 1998



    Publication date :

    1998-02-01




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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