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Table 5 Forming defects according to blank thickness and the inflow angles

From: Deep Drawing Process Using a Tractrix Die for Manufacturing Liners for a CNG High-Pressure Vessel (Type II)

Inflow angle
Thickness
t0: 7 mm
D0: 1350 mm
t0: 8 mm
D0: 1263 mm
9–12 mm
1\(^\circ\) Folding Folding Non-defect
5\(^\circ\) Folding Folding Non-defect
6\(^\circ\) Folding Folding Non-defect
7\(^\circ\) Folding Folding Non-defect
8\(^\circ\) Folding Wrinkling Non-defect
9\(^\circ\) Folding Wrinkling Non-defect
10\(^\circ\) Folding Wrinkling Non-defect
11\(^\circ\) Folding Wrinkling Non-defect
12\(^\circ\) Folding Wrinkling Non-defect
13\(^\circ\) Folding Wrinkling Non-defect
14\(^\circ\) Folding Wrinkling Non-defect