Calculation of the increased yield strength according to DIN EN 1993-1-3, Equation (3.1)
|
Ag |
Gross cross-section area |
|
k |
Deformation-dependent numerical value, k = 7 for roll forming, k = 5 for other forming methods |
|
n |
Number of deflections by 90° in the cross-section with an inner radius of r ≤ 5 ⋅ t (deflections below 90° are to be considered as fractions of n) |
|
t |
Design core thickness of the steel material before the cold forming, minus all metallic and organic coatings |