1.1 This test method gives the procedure for constructing a forming limit curve (FLC) for a metallic sheet material by using a hemispherical deformation punch test and a uniaxial tension test to quantitatively simulate biaxial stretching and deep drawing processes.
1.1.1 Fig. 1 shows an example of a forming limit curve on a schematic forming limit diagram (FLD).
FIG. 1 Schematic Forming Limit Diagram
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