CNC Machining Design Guide

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Diagrams and Calculator Inputs
 Slab Width H  
 Notch Depth t  
 Notch Radius r  
 Distance between Notches d H - 2t
 Slab Thickness h << H

Stress Concentration Factors

Input data
H = 100 mm
t = 10 mm
r = 10 mm
 2.27  (2.41 in some literatures)
 2.83  (3.02 in some literatures)
Note that the stress concentration factors are calculated from experimental data using curve fitting, so only two decimal places are given.