Efficient Finite Element Modelling For Complex Shaft Couplings Under Non-Symmetric Loading

Sum, Wei Siang; Leen, Seán B.; Williams, Edward J.; Sabesan, R; McColl, I.R.

doi:10.1243/030932405x30858

Cited by 10 publications

(5 citation statements)

References 15 publications

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“…This method can predict some critical experimental phenomena, such as crack occurrence. Leen et al [47] and Sum et al [48] simulated the operating conditions of aero engine splines and analyzed the wear problems caused by fretting motion using computational contact mechanics and finite element methods, considering complex asymmetric loads and variable loads. Liu [49] found that wear can be reduced by improving the machining accuracy of the spline, reducing the spline fit clearance, and improving strength by heat treatment.…”

Section: Effect Of Misalignment On Spline Wearmentioning

confidence: 99%

A Review of Aviation Spline Research

et al. 2022

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Splines are irreplaceable in high-speed aviation fields due to their simplicity, reliability, and high specific power. Aviation splines are not only subjected to severe operating mechanical loads, but also sometimes operate under grease-lubricated and non-lubricated environments. All of this results in aviation splines suffering widespread failures. Since the 1960s, many researchers have carried out much research on aviation splines. The wide range of research topics demonstrates the technical challenges of understanding aviation spline. This paper reviews the research of aviation spline from the aspects of failure form, fatigue strength, surface contact stress, effects of lubrication, and misalignment on wear, as well as experiments. Relevant research shows crowned splines can mitigate the spline wear process induced by angular misalignment, and oil-lubricating splines experience almost no wear. This paper also looks forward to the future development directions of aviation splines.

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Section: Effect Of Misalignment On Spline Wearmentioning

confidence: 99%

A Review of Aviation Spline Research

et al. 2022

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“…A localised mesh refinement technique using multipoint constraints has therefore been developed. 15 The full FE model is shown in Fig. 3 with eight node linear brick elements being used throughout.…”

Section: Finite Element Modelling Of Spline Couplingmentioning

confidence: 99%

Finite element simulation of fretting wear-fatigue interaction in spline couplings

Ding¹,

Leen²,

Williams³

et al. 2008

Tribology - Materials, Surfaces & Interfaces

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This paper describes a finite element based method for simulating the effects of material removal, associated with fretting wear, on fretting fatigue parameters in a spline coupling. An incremental wear simulation technique is implemented with a single tooth finite element model of the coupling for symmetric loading, assuming equal wear on all teeth, using a comparatively coarse mesh model, for computational efficiency. A surface interpolation technique is implemented to map the predicted distributions of wear onto a non-symmetric, 360u (18-tooth) model, with detailed refinement on one tooth, to predict the effect of wear on the evolution of stress, strain and fatigue parameters and on subsequent life prediction. The life prediction is based on a critical plane multiaxial fatigue parameter approach, along with cumulative damage for combined load cycles and for wear induced changes in the fatigue parameters. Furthermore, the effect of wear due to the rotating bending moment and fluctuating torque on fretting fatigue damage accumulation is presented. Low frequency, torque and axial loading induced wear, leading to gross slip conditions on all teeth, is predicted to reduce fretting fatigue parameters and hence increase life. In contrast, higher frequency, rotating moment and fluctuating torque induced wear, corresponding to partial slip conditions, is predicted to increase fretting fatigue parameters away from the contact edges and hence lead to fretting fatigue cracking away from the contact edges and, for the case studied here, to a reduction in predicted life, as observed experimentally. The results are interpreted vis-à -vis published test data for scaled aeroengine splines.

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“…Lees [5] et al studied the misalignment of rigid couplings, mainly using the high-order finite element unit method. Sum and Leen [6] used the finite element method to simulate the relative motion of the spline coupling under asymmetric loads and variable loads in aero-engines. Sekhar.A.S.…”

Section: Introductionmentioning

confidence: 99%

Stability Analysis of Rotor with a Spline Coupling

Wang

et al. 2022

J. Phys.: Conf. Ser.

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The spline coupling is widely used in aero-engines. Once the spline coupling fails, it will cause great damage to the engine. In this paper, the stability of a rotor with a spline coupling was studied. The internal damping instability model of the rotor with spline coupling is deduced, and the instability mechanism is explored. The stability boundary is analyzed by using the R-H criterion. The mechanism of rotor instability is analyzed by simulation. An experimental system of rotors with different structural parameters of spline coupling was built. The influence of the positioning surface clearance on the stability was analyzed. The modeling results show that the internal friction of the spline coupling will introduce additional damping and anti-symmetrical cross stiffness to the rotor, the additional damping will reduce the vibration response, and the anti-symmetrical cross stiffness will cause the rotor to become unstable. The simulation and experimental results show that the rotor system will not be unstable when the two positioning surfaces of the spline coupling are in an interference fit. When one of the positioning surfaces is a clearance fit and the other is an interference fit, the internal friction will cause the rotor to become unstable. The instability threshold speed is higher than the first-order critical speed. At the same time, due to the additional damping introduced by the sleeve tooth structure, there will be a transition stage of instability. At this time, the rotor will vibrate with sub-harmonic components, but the vibration amplitude of the rotor will decrease. When the two positioning surfaces are clearance fit, the rotor is unstable and the amplitude increases suddenly. The obtained instability characteristics of the rotor with spline coupling have important value for the instability fault diagnosis, and provide help for the stability control.

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Efficient Finite Element Modelling For Complex Shaft Couplings Under Non-Symmetric Loading

Cited by 10 publications

References 15 publications

A Review of Aviation Spline Research

A Review of Aviation Spline Research

Finite element simulation of fretting wear-fatigue interaction in spline couplings

Stability Analysis of Rotor with a Spline Coupling

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