Question - What Is The Term Fatigue Cracking And State With Reasons Two Factors Of Crankshaft Operation Which Have The Greatest Influence On The Likelihood Of Fatigue Cracking ?
Answer -
Fatigue cracking occurs when the primary cause of crack propagation is due to the fluctuating nature of the stress applied to the component.
The following factors could produce fatigue cracking:
- High combustion pressures, increasing the bending stress applied to each crankshaft throw
- Excessive crankshaft bending due to a main bearing failure, which increases the crankshaft bending stresses.