Answer:
232.715 MPa
Explanation:
A flow diagram showing the graphical illustration on how to solve the question is attached below;
From the diagram:
We can determine the maximum stress [MPa] for the shaft to last up to 150,000 cycles as follows:
[tex]\frac{y-2.29}{2.5697-2.29} = \frac{5.176-6}{3-6}[/tex]
- 3 ( y -2.29) = (-0.824 × 0.2797)
-3y + 6.87 = - 0.2304728
6.87 + 0.2304728 = 3 y
7.1004728 = 3y
y = [tex]\frac{7.1004728}{3}[/tex]
y = 2.3668
where y = log σ
log σ = 2.3668
σ = 232.715 MPa
