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A Ti-6Al-4V bar (fatigue curve shown below
is subjected to a cyclic load of 7854 N at a
frequency of 10 cycles per day. The bar is
10 mm in diameter. How long with the bar
last? Assume stress = force/area.
140
120
100
80
60
40
20
1.00E+02
1.00E+03
1.00E+04
1.00E+05
1.00E+06
1.00E+07
Number of Cycles
300 days
О 1 уear
200 days
It will not fail
It will fail immediately
Stress Amplitude, MPa

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