Accelerated Lifetime Testing of Reinforced Polymer Gears

Tavčar, Jože; Grkman, Gašper; Duhovnik, Jože

doi:10.1299/jsmeimpt.2017.09-06

Cited by 4 publications

(5 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, it is necessary to carry out indepth studies on the time-varying mesh stiffness (TVMS) and dynamic characteristics of steel-plastic gear pairs. Existing studies on plastic gears have investigated various aspects, such as tooth wear [1][2][3][4], damage mode [5][6][7], temperature [8][9][10], load distribution [11][12][13], fatigue life [14,15], etc. TVMS and nonlinear dynamics of gears have long been a hot issue in the field of gear transmission.…”

Section: Introductionmentioning

confidence: 99%

Investigation on the time-varying meshing stiffness and dynamic characteristics of steel-plastic gear pair

Xiong

Huang

et al. 2022

Preprint

View full text Add to dashboard Cite

Large errors in time-varying mesh stiffness calculations of steel-plastic gears can result from the use of the potential energy method.Therefore, this paper considers the meshing characteristics and material properties of the steel-plastic gear pair, and proposes a method to calculate the time-varying mesh stiffness. The influence of load change on the time-varying mesh stiffness and dynamic performance of the steel-plastic gear pair is also considered. The simulation results show that the stiffness changes linearly with the load. The dynamic performance of the steel-plastic gear pair deteriorates with the increase in load. Under the same load condition, the dynamic response considering the effects of premature and extended tooth contact is better than that of the gear pair that does not consider the premature and extended tooth contact; this advantage is more evident at higher load.

show abstract

Section: Introductionmentioning

confidence: 99%

Investigation on the time-varying meshing stiffness and dynamic characteristics of steel-plastic gear pair

Xiong

Huang

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

“…Polyamide 66 (PA66) is widely used in various automobiles and industrial machine parts such as gears [1,2,3,4,5], bearing retainers [6,7,8], and rollers [9]. Because PA66 exhibits excellent heat resistance and good mechanical or tribological properties, it can be used in automobile engine compartments [10,11].…”

Section: Introductionmentioning

confidence: 99%

Soft EHL-Based Friction Mechanism of Unreinforced and GF-Reinforced PA66 in Contact with Steel Under PAO8 Oil Lubrication

et al. 2021

View full text Add to dashboard Cite

Polyamide 66 is widely used in polymer sliding parts including polymer gear. These parts are used under lubrication of oil and grease. In this study, the friction mechanism of the contact between polyamide 66 and a steel counterpart lubricated with additive-free polyalphaolefin8 oil was discussed by focusing on various parameters including the sliding surface roughness, normal load (contact pressure), sliding speed, temperature, and hardness of the steel counterpart. To explain the friction coefficient obtained under different test conditions, the theoretical minimum oil film thickness was calculated using the equation of the soft elastic hydrodynamic lubrication regime presented by Hamrock and Dowson considering the temperature dependence of oil viscosity and polymer mechanical properties, and the master curve of the relationship between Λ and the friction coefficient was proposed considering the change in the roughness on the sliding surface. In addition, the contributions of the oil film based on the proposed master curve and lubricated solid/solid contact based on the Bowden-Tabor theory to the friction coefficient were discussed. Furthermore, the friction mechanism using the glass fiber-reinforced PA66 composite was investigated and compared to that of the unreinforced PA66.

show abstract

“…The performance of symmetric polymer gears under rotational conditions has been studied in many works. Tavcar et al 22 conducted accelerated tests to investigate the performance of various unreinforced and reinforced polymer gears made of materials such as PA6, PA66, POM, and PPS. Zorko et al 23 investigated the performance of polyetheretherketone gears under dry and lubricated environments.…”

Section: Introductionmentioning

confidence: 99%

“…Tavcar et al. 22 conducted accelerated tests to investigate the performance of various unreinforced and reinforced polymer gears made of materials such as PA6, PA66, POM, and PPS. Zorko et al.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical investigation of the bending fatigue performance of symmetric and asymmetric polymer gears

Pandian

Gautam

Selvaraj

2020

Proceedings of the Institution of Mechanical Engineers, Part L:

View full text Add to dashboard Cite

In this work, the bending fatigue strengths of injection-molded symmetric and asymmetric nylon 66 gears were evaluated experimentally, and the results were substantiated using numerical studies. The symmetric (20°/20°) and asymmetric (34°/20° and 20°/34°) configurations were subjected to bending fatigue tests under a load controlled mode. The bending stresses of the symmetric and asymmetric gears were predicted by quasi-static simulations using a commercial finite element analysis software. The form factor ([Formula: see text]) and the stress correction factor ([Formula: see text]) were computed using an adapted ISO method. The 34°/20° configuration exhibited the lowest bending stress and highest bending fatigue life among the tested configurations. The form factor exerted a decisive influence on the magnitude of the bending stress compared to the stress correction factor. For the considered loading conditions, deflection-induced load sharing occurred in the 20°/20° and 20°/34° configurations but was absent in the 34°/20° configuration. Failure analysis indicated that a high stress concentration caused multiple cracks in the fillets of asymmetric gears.

show abstract

Accelerated Lifetime Testing of Reinforced Polymer Gears

Cited by 4 publications

References 0 publications

Investigation on the time-varying meshing stiffness and dynamic characteristics of steel-plastic gear pair

Investigation on the time-varying meshing stiffness and dynamic characteristics of steel-plastic gear pair

Soft EHL-Based Friction Mechanism of Unreinforced and GF-Reinforced PA66 in Contact with Steel Under PAO8 Oil Lubrication

Experimental and numerical investigation of the bending fatigue performance of symmetric and asymmetric polymer gears

Contact Info

Product

Resources

About