Fatigue Fracture of an 8640 Steel Shaft From a Fuel-Injection-Pump Governor Because of Insufficient Fatigue Strength
An 8640 steel shaft installed in a fuel-injection-pump governor that controlled the speed of a diesel engine used in trucks and tractors broke after few days of operation. The mechanism that drove the shaft was designed to include a slip clutch to protect the governor shaft from shock loading. It was revealed by visual examination that the fracture had initiated in the sharp corner at the bottom of a longitudinal hole which was part of a force feed lubricating system. Beach marks were observed on the fracture surfaces. It was revealed by further examination that the slip clutch was...
Fatigue Fracture of an 8640 Steel Shaft From a Fuel-Injection-Pump Governor Because of Insufficient Fatigue Strength, ASM Failure Analysis Case Histories: Automobiles and Trucks, ASM International, 2019, https://doi.org/10.31399/asm.fach.auto.c0047846
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