The values of experimentally obtained a, b, and S of bottom circular arcs.
|In the 0° direction||In the 45° direction|
|L = 108 mm, θ = 30°, T = 2.5 mm, on an 800-ton hydraulic press||L = 112 mm, θ = 30°, T = 2.5 mm, on a 500-ton hydraulic press||L = 108 mm, θ = 30°, T = 2.5 mm, on an 800-ton hydraulic press||L = 112 mm, θ = 30°, T = 2.5 mm, on a 500-ton hydraulic press|
|a = 4.5 mm||a = 1.5 mm||a = 7.2 mm||a = 4.4 mm|
|b = 4.1 mm||b = 1.2 mm||b = 6.3 mm||b = 4.1 mm|
|S = 9.22 mm2||S = 0.90 mm2||S = 22.68 mm2||S = 18.04 mm2|
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