2022年6月1日 · In particular, fatigue fracture is the most common failure mechanism of shafts owing to the influence of cyclic loads on shafts under normal working conditions. This work focuses on the fatigue failure characteristics of shafts under different loading and working conditions, and outlines the main causes of shaft fatigue failure.

Shaft can fail in two different ways due to keyway and key as stress raiser; it can fail by fracture from the end of the keyway perpendicular to the shaft axis or by peeling off a chunk of metal along the key way.

ribing a particular mode of failure. Fatigue crack phenomena in metals is initiated by nucleation in at the nano- and micro- scales, leading to macroscopic crack growth and propagation, and ultimately to complet.

2022年6月1日 · Fatigue fracture is the most common failure mechanism of shafts owing to the influence of cyclic loads on shafts under normal working conditions. The fatigue failure characteristics, environmental factors, wear fatigue, and causes of fatigue failure of shafts are described in detail.

7.2 Fatigue of Metals • Metals often fail at much lower stress at cyclic loading compared to static loading • Crack nucleates at region of stress concentration and propagates due to cyclic loading

The macroscopic analysis of the shaft showed that the failure is of fatigue however closer microscopic examination revealed a fracture appearance that was more brittle and inter-granular than normal for a fatigue failure. The unexpected appearance of the fatigue fracture surface may simply be the characteristic of material.

2021年5月24日 · In this paper, a study on shaft failure in a speed reduction box was carried out. A section of a fractured shaft made of hardened austempered steel was analyzed to determine the cause of the break. Fractography was performed to characterize the failure mode on …

2023年8月23日 · Microhardness tests were conducted on the fracture area of the failed shaft, including measurements across the weld, the HAZ, and the base metal. The results revealed a significant variation in hardness among these zones.

2024年8月1日 · Fatigue Fracture: Fatigue fracture is the ultimate failure of a material or component due to the cumulative effect of cyclic stresses or strains. This phenomenon occurs through three distinct stages: Crack Initiation: Microscopic cracks form at stress concentration points, often at surface imperfections or material discontinuities.

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