Fatigue calculation does not fix exactly the line between a crack and a no-crack initiation, but is rather a statistical probability of crack occurrence under Nafa conditions, eventually representing ...

Fatigue analysis under random loading is a critical area of study that addresses the degradation of materials and structures exposed to unpredictable, cyclic stresses. Recent advancements have focused ...

EPRI (Electric Power Research Institute) reports that 7FA gas turbines have a rotor life of about 144,000 hours, or 5,000 starts. The primary life-limiting factor is high cycle fatigue cracks ...