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Table 6 Relative radial stress according draw ratios (2.3–2.6) and inflow angles (1\(^\circ\)–10\(^\circ\))

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

Draw ratio (2.3)
 Inflow angle of workpiece (\(^\circ\)) 1 2 3 4 5 6 7 8 9 10
 Relative radial stress 0.89 0.89 0.90 0.90 0.91 0.92 0.93 0.94 0.95 0.96
Draw ratio (2.4)
 Inflow angle of workpiece (\(^\circ\)) 1 2 3 4 5 6 7 8 9 10
Relative radial stress 0.93 0.93 0.94 0.94 0.95 0.96 0.97 0.98 0.99 1.00
Draw ratio (2.5)
 Inflow angle of workpiece (\(^\circ\)) 1 2 3 4 5 6 7 8 9 10
  Relative radial stress 0.96 0.97 0.98 0.98 0.99 1.00 1.01 1.02 1.03 1.04
Draw ratio (2.6)
 Inflow angle of workpiece (\(^\circ\)) 1 2 3 4 5 6 7 8 9 10
  Relative radial stress 1.00 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08