Drive shafts
In torsion
In bending
Combined torsion bending

Drive shaft in torsion (fatigue)
Notched shaft
Shaft with keyway
Shoulder fillet
Traverse hole
Grooved shaft

Drive shaft in bending (fatigue)
Notched shaft
Shoulder fillet
Traverse hole
Grooved shaft

Shaft in Tension (fatigue)
Grooved shaft
Piston rod connection

Dynamically loaded
Fasteners
Welded structures