Study on gear contact fatigue failure competition mechanism considering tooth wear evolution

Liu, Heli; Liu, Huaiju; Zhu, Caichao; Tang, Jinyuan

doi:10.1016/j.triboint.2020.106277

Cited by 66 publications

(34 citation statements)

References 49 publications

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“…where hw stands for the wear depth, s denotes the sliding distance, pm represents the mean value of the local contact pressure, and the wear coefficient k is chosen to be 1.9 × 10 −19 m 2 N −1 according to reference [103], where the similar gear steel material after case-hardening is used. Based on the same gear sample introduced in Section 2.2, Figure 13 displays the maximum Hertzian contact pressure pH and the SRR distributions along the LOA [104]. Moreover, Figure 14 presents the estimated wear depths along the line of action (LOA) during the first loading cycle of both the driving and the driven gears [104].…”

Section: The Sliding/rolling Conditionmentioning

confidence: 99%

“…Based on the same gear sample introduced in Section 2.2, Figure 13 displays the maximum Hertzian contact pressure pH and the SRR distributions along the LOA [104]. Moreover, Figure 14 presents the estimated wear depths along the line of action (LOA) during the first loading cycle of both the driving and the driven gears [104]. Compared with these two figures, a simple conclusion can be made that the micropitting, wear behaviors and the SRR are interrelated.…”

Section: The Sliding/rolling Conditionmentioning

confidence: 99%

“…In this regard, the authors also studied the gear contact failure competitive mechanism resulting from wear process [104]. Instead of revealing the competitive phenomenon between the contact failures and wear, the competitive mechanism between micropitting and pitting due to the wear effect was investigated.…”

Section: Progress On Competitive Mechanismmentioning

confidence: 99%

“…In the authors' work, the loading cycles number within a loading block was decided to be ∆N = 1 × 10 6 . Figure 17 shows the surface roughness profile of different damage stages [104]. As the wear process proceeds, the volumetric and the smooth wear effects on the surface roughness would occur simultaneously.…”

Section: Progress On Competitive Mechanismmentioning

confidence: 99%

“…Additionally, the effect of the initial surface roughness on the competitive mechanism has also been studied. Figure 19 displays the depth of the maximum damage accumulation (when D = 0.2) of different initial surface roughness values from 0.07 to 0.25 µm [104]. The depth of the maximum damage accumulation decreases from around 0.28 mm (initial roughness RMS = 0.07 µm) to around 0.027 mm (initial roughness RMS = 0.25 µm).…”

Section: Progress On Competitive Mechanismmentioning

confidence: 99%

See 4 more Smart Citations

A Review on Micropitting Studies of Steel Gears

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Zhu

et al. 2019

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With the mounting application of carburized or case-hardening gears and higher requirements of heavy-load, high-speed in mechanical systems such as wind turbines, helicopters, ships, etc., contact fatigue issues of gears are becoming more preponderant. Recently, significant improvements have been made on the gear manufacturing process to control subsurface-initiated failures, hence, gear surface-initiated damages, such as micropitting, should be given more attention. The diversity of the influence factors, including gear materials, surface topographies, lubrication properties, working conditions, etc., are necessary to be taken into account when analyzing gear micropitting behaviors. Although remarkable developments in micropitting studies have been achieved recently by many researchers and engineers on both theoretical and experimental fields, large amounts of investigations are yet to be further launched to thoroughly understand the micropitting mechanism. This work reviews recent relevant studies on the micropitting of steel gears, especially the competitive phenomenon that occurs among several contact fatigue failure modes when considering gear tooth surface wear evolution. Meanwhile, the corresponding recent research results about gear micropitting issues obtained by the authors are also displayed for more detailed explanations.

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Section: The Sliding/rolling Conditionmentioning

confidence: 99%

Section: The Sliding/rolling Conditionmentioning

confidence: 99%

Section: Progress On Competitive Mechanismmentioning

confidence: 99%

Section: Progress On Competitive Mechanismmentioning

confidence: 99%

Section: Progress On Competitive Mechanismmentioning

confidence: 99%

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A Review on Micropitting Studies of Steel Gears

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Zhu

et al. 2019

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Electromagnetic performance analysis of the umbrella shaping inner rotor coaxial magnetic gear with dual modulation rings

Wang

Zhang

Qian

et al. 2022

Energy Science & Engineering

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The coaxial magnetic gear is a new type of noncontact transmission mechanism, which avoids the inherent defects of the mechanical gearbox due to gear meshing transmission. To study a coaxial magnetic gear (CMG) with high torque density and low torque ripple to replace the mechanical gear in the semidirect drive wind turbine, a novel umbrella shaping inner rotor CMG (US-CMG) with an auxiliary modulation ring is proposed in this paper.The novel structure adopts a CMG with a dual modulated ring to increase the electromagnetic torque. In addition, the magnetic block of the poled inner rotor is divided into three pieces magnetized by Halbach arrays, and the middle piece is umbrella-shaped to reduce torque ripple. Based on the topology of the US-CMG and the principle of the magnetic field modulation, the operation mechanism of the US-CMG is analyzed. A contrastive analysis among the US-CMG, Halbach magnetized dual-modulator CMG (HM-CMG), and surface-mounted CMG (SM-CMG) is established to identify the performance of the US-CMG. Compared with the SM-CMG, the results show that the electromagnetic torque of the US-CMG has increased by 65.46%, and the torque ripple of the US-CMG is 57.6% of that of the SM-CMG.

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Numerical analysis on mechanical and fatigue behaviors of aviation electrical connector considering structural effect

Luo,

Wang,

Jiang

et al. 2023

Int J Numerical Modelling

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This work is motivated by the fact that the reliability of electrical connectors influenced by their mechanical behavior and fatigue life directly affects the working performance of the whole equipment system. In this paper, theoretical analyses of insertion force, maximum stress, and fatigue life in an aviation electrical connector are presented and the corresponding mathematical models are firstly derived. Then, to numerically investigate its mechanical behavior and fatigue life, a simplified 3D FE model is developed by using ABAQUS and FE‐SAFE software and verified by experiments and theoretical analysis. Finally, the distribution and evolution characteristics of contact forces, stress and fatigue life considering the influences of reed thickness and slot width are quantitatively analyzed in details. The results indicate that the insertion force first increases and then stabilizes at the level of 0.16 N as the pin head is fully inserted into the jack, which shows an opposite to the evolution of extraction force. Moreover, the maximum value of stress and the minimum value of fatigue life are all located at the root of the jack reed. Besides, unlike the small effect of slot width, the Fimax and σmax values obviously increase and the Nf value decreases with the increment of reed thickness.

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Study on gear contact fatigue failure competition mechanism considering tooth wear evolution

Cited by 66 publications

References 49 publications

A Review on Micropitting Studies of Steel Gears

A Review on Micropitting Studies of Steel Gears

Electromagnetic performance analysis of the umbrella shaping inner rotor coaxial magnetic gear with dual modulation rings

Numerical analysis on mechanical and fatigue behaviors of aviation electrical connector considering structural effect

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