Transactions of Materials and Heat Treatment

Title：Digital image correlation measurement for forming properties of sheet metal

Authors： Li Dacheng Liang Jin Hu Hao Tang Zhengzong

Unit： Foshan Polytechnic Xi'an Jiaotong University

KeyWords： image correlation measurement plastic strain ratio forming limit diagram sheet metal

ClassificationCode：TP394.1

year,vol(issue):pagenumber：2014,39(5):23-28

Abstract：

To get the two key performance indicators of sheet metal forming as plastic strain ratio and forming limit diagram(FLD), the corresponding measurement methods and experiment procedures were designed and conducted based on digital image correlation method. And the key technologies involved were also discussed. It can be concluded from the experimental results of the SPCC sheet steel and magnalium sheet forming tests that this method can high efficiently provide the three-dimensional strain field of surface for measured test piece, which provides an effective solution of strain measurement for test analysis of forming properties of sheet metal. The measured SPCC sheet steel is not a constant value, and it gradually decreases as the strain increases, showing obvious anisotropy. And the measured FLD contributes to fully understand and utilize the material properties, which provides an important reference for reasonable material selection of parts in actual production.

Funds：

国家自然科学基金资助项目(51275389，51275378)

李大成（1962-），男，本科，教授胡浩（1985-），男，博士研究生

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