This paper introduces an industrial application of digital image correlation technique on the measurement of aluminum edge stretching limit. In this study, notch-shape aluminum coupons with three different pre-strain conditions are tested. The edge stretching is proceeded by standard MTS machine. A dual-camera 3D Digital Image Correlation (DIC) system is used for the full field measurement of strain distribution in the thickness direction. Selected air brush is utilized to form a random distributed speckle pattern on the edge of sheet metal. A pair of special optical lens systems are used to observe the small measurement edge area. From the test results, it demonstrate that refer to the notched coupon thickness, pre-tension does not affect the fracture limit; refer to the virgin sheet thickness, the average edge stretch thinning limits show a consistent increasing trend as the pre-stretch strain increased. Test plan, experimental setup, and experimental results are shown in detail in this article.


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    Title :

    Measurement of Aluminum Edge Stretching Limit Using 3D Digital Image Correlation


    Additional title:

    Sae Technical Papers


    Contributors:
    Sia, Bernard (author) / Du, Changqing (author) / Phillips, Christina (author) / Zhou, Dajun (author) / Yang, Guobiao (author) / Yang, Lianxiang (author) / Li, Xiaona (author) / Xie, Xin (author) / Zheng, Yaqian (author) / Chen, Yi-Hsin (author)

    Conference:

    SAE 2015 World Congress & Exhibition ; 2015



    Publication date :

    2015-04-14




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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