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2.2.1 Tutorial 1 - Basquin Model with ASTM1049 Rainflow Counting

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This tutorial provides a step-by-step demonstration for Basquin fatigue analysis using Fatigue+ software.


A mechanical component made of ASTM A36 is loaded with cyclic von Mises stress history in one event as follows:


-20, 10, -30, 50, -10, 30, -40, 40, -20


The unit of the stresses is MPa.  The stress history is taken from FIG. 6 of ASTM E1049, Standard Practices for Cycle Counting in Fatigue Analysis, amplified by 10 times.



To calculate fatigue strength reduction factor Kf, consider a corrosive environment factor of 0.90 and a notch effect factor of 0.70.


Use Basquin model and Goodman mean stress criterion, calculate the fatigue life of the component.





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