Multiple choice

A cylindrical shaft is subjected to an alternating stress of 100 MPa. Fatigue strength to sustain 1000 cycle is 490 MPa. If the corrected endurance strength is 70 MPa, estimated shaft life will be

  1. 1071 cycles

  2. 15000 cycles

  3. 281914 cycles

  4. 928643 cycles
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

$And\hspace{4cm}log_{10}N=5.455 \\ \hspace{5.7cm}N=10^{5.455=285101}\\ \text{The nearest shaft life is 281914 cycles.}$

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