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Machine Design

How-to, in-depth technical articles for machine design engineers

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Materials

Design

Processes

Units

Formulas

Math
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
Answer
 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.