Size_Factor_Round_Rotating
Size_Factor_Round_Rotating(D)
Function Size_Factor_Round_Rotating returns the endurance limit modification factor associated with size (The Marin factor k_b) for bending and torsion of round rotating bars.
Input:
D - diameter ([m] or [ft])
Output:
Returns the dimensionless endurance limit modification factor associated with size.
Example:
$Load Mechanical Design
$UnitSystem SI Mass J K Pa
D=0.01 [m]
k_b=size_factor_round_rotating(D)
{Solution:
k_b = 0.9692}
Reference: Budynas, R.G. and J. Keith Nisbett, Shigley's Mechanical Engineering Design, 11th Edition, McGraw Hill, New York, (2020).