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Communication Dans Un Congrès Année : 2018

Flange bulging test of zinc alloy : comparison of analyses with analytical models and with stereo-correlation technique

Résumé

Zinc alloys are used in a wide range of application such as electronics, automotive and building construction. Their various shapes are generally obtained by metal forming operation such as stamping. Therefore, it is important to characterize the material with adequate characterization tests. Sheet Bulging Test is well recognized in the metal forming community. Different theoretical models of the literature for the evaluation of thickness and radius of the deformed sheet in sheet bulging test have been studied in order to get the hardening curve of different materials. These theoretical models present the advantage that the experimental procedure is very simple. But Koç et al. showed their limitation, since the combination of thickness and radius evaluations depend on the material. As Zinc alloys are strongly anisotropic with a special crystalline structure, a procedure is adopted for characterizing the hardening curve of a Zinc alloy. The anisotropy is first studied with tensile test, and sheet bulging test with elliptical dies is also investigated. Parallel to this, Digital Image Correlation measures are carried out. The results obtained from theoretical models and digital image correlation measures are compared. Measures done on post-mortem specimens complete the comparisons. Finally, digital image correlation measures give better results and the resulting hardening curve of the studied zinc alloy is provided.
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Dates et versions

hal-02300520 , version 1 (29-09-2019)

Identifiants

  • HAL Id : hal-02300520 , version 1

Citer

Ludovic Vitu, Nicolas Laforge, Pierrick Malecot, Nathalie Boudeau, Marc Milesi, et al.. Flange bulging test of zinc alloy : comparison of analyses with analytical models and with stereo-correlation technique. International Conference on Metal Forming, Sep 2018, Toyohashi, Japan. ⟨hal-02300520⟩
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