Analysis of fatigue failure on the keyway of the reduction gear input shaft connecting a diesel engine caused by torsional vibration

Han, Hyung-Suk

doi:10.1016/j.engfailanal.2014.05.012

Cited by 17 publications

(11 citation statements)

References 5 publications

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“…where d a is the shaft diameter, M a is the resulting bending moment, T m is the torsional moment, K b and K t are the bending and the torsional stress concentration factors, respectively. These factors are given by the following equations (Han, 2014)…”

Section: Methodsmentioning

confidence: 99%

Multidisciplinary design optimization of a gear train transmission

Mahiddini

Chettibi

Benfriha

et al. 2019

Concurrent Engineering

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This article presents a method for multidisciplinary design optimization of a one-stage gear train transmission for an industrial application. The formulation and implementation that enable the integrated design of the gearbox elements (gears, shafts, and bearings) are detailed. The analytical formulation problem is based on four disciplines: product reliability, customer preference, product cost, and structure. The proposed integrated design process takes into account constraints imposed by quality standards. The optimization of the gear train transmission is performed according to a multidisciplinary feasible architecture and uses a population-based evolutionary algorithm (non-dominated sorting genetic algorithm II) to generate Pareto-optimal fronts. Finally, a detailed case study is presented to illustrate the effectiveness of the proposed approach.

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Section: Methodsmentioning

confidence: 99%

Multidisciplinary design optimization of a gear train transmission

Mahiddini

Chettibi

Benfriha

et al. 2019

Concurrent Engineering

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“…Hence, this high-stress value should not create static failure at the keyway. However, as the machine is operated, vibration occurs due to the dynamic load from the cutting action (Han, 2014). As a result, fluctuating load comes into play and produce relative motion between the key and its keyway.…”

Section: Hb Was Calculated By Equation 2 Asmentioning

confidence: 99%

Failure Investigation of Plastic Shredding Machine’s Flange Coupling Based on Mechanical Analysis

Nurprasetio

Budiman²,

Triawan

2017

IJOST

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This paper presented the investigation of failure mechanism of plastic shredding machine's flange coupling which is made of cast steel. The machine unexpectedly stalled a few minutes after High-Density Polyethylene (HDPE) plastic bottles were fed into the machine. It was discovered afterward that the flange broke with the large crack surface. Finite element analysis (FEA) was performed to find the position and value of the critical stresses in the flange during operating condition. Subsequently, hardness test was conducted on the flange body to determine the Brinell hardness which was then converted into the approximate ultimate tensile strength (σu). As a result, a maximum Von Mises stress of 287 MPa was confirmed from the FEA to be concentrated in the flange's keyway. Although this was found to be lower than the approximate σu obtained from hardness testing i.e. 449 MPa, the critical stress indicated an unstable condition which may induce a crack initiation any time when vibration or dynamic load occurs. Based on these analyses, it was concluded that the failure had been initiated by dynamic rather than static loading generated during machine stall condition. The dynamic load caused crack initiation at a stress concentration point of the keyway. The crack then propagated rapidly, breaking the flange body.

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“…Various case studies [8,9] have shown that inadequate torsional vibration calculation parameters (shaft elements stiffness and damping, natural frequencies, safety factors) and a subsequent poor design of the shaft's keyway cause failures. In this case a root cause analysis has been made by the analytical stress calculation process MIL G 17859D and VDI 3822 standards.…”

Section: Shaft Keysmentioning

confidence: 99%

“…Inadequate design of these elements can lead to fatigue failure. Case Figure 3 The Characteristic Torsional Failure Crack Shape [8] studies of fractures initiated at this elements [10], [11] show fatigue due to cyclic torsional-bending load, with a crack that originates in multiple points on fillet shoulders on the shaft, gradually reducing the load bearing area of the shaft as it grows, and finally resulting in a sudden failure during overload as shown in Figure 4. The analysis for this case study has been comprised of chemical composition analysis, micro-structural characterization, fractography, hardness measurements, and finite element simulation.…”

Section: Filletsmentioning

confidence: 99%

Common failures of ship propulsion shafts

2017

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This article aims to provide a critical review of the most common failures of ship propulsion systems as a crucial ship system, with emphasis on fatigue failure. The accent is given on the shaft of marine propulsion systems as a most common point of failures in the entire propulsion system. A general description of failure causes and failure analysis methodology is presented. Several representative case studies summaries for fatigue failure on critical points of the propulsion shaft are described. Torsional vibrations and geometric stress concentrations of the shaft are identified as the most common cause of fatigue failure. The importance of constant monitoring, measurement and data collection of fatigue indicators and indicative events that have influence on fatigue development is emphasized. Methods used in failure analysis are discussed and propositions for improvement are given, especially in terms of using numerical routines in failure prediction.

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Analysis of fatigue failure on the keyway of the reduction gear input shaft connecting a diesel engine caused by torsional vibration

Cited by 17 publications

References 5 publications

Multidisciplinary design optimization of a gear train transmission

Multidisciplinary design optimization of a gear train transmission

Failure Investigation of Plastic Shredding Machine’s Flange Coupling Based on Mechanical Analysis

Common failures of ship propulsion shafts

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