Evaluating the tribological and mechanical properties of filament wound composite incorporated with PTFE fibers and tungsten carbide filler applicable for self-lubricating bearings

Shahramforouz, Fatemeh; Hejazi, Seyed Mahdi; Taherizadeh, Aboozar

doi:10.1088/2051-672x/ac22f2

Cited by 6 publications

(2 citation statements)

References 44 publications

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“…By preventing sliding interfaces from making direct contact with the tribofilm, frictional pairs perform better tribologically. As a result, many studies are trying to reduce polymer‐metal sliding pair friction and wear by designing high‐performance polymer composites 5 . This study by Qi et al examined how reinforcing fillers such as carbon fibers and aramid particles affected the performance of polyimide with PTFE while it was sliding on copper (Cu) under dry and sea water lubrication conditions.…”

Section: Introductionmentioning

confidence: 99%

Study on microstructure and tribological properties of hierarchical 3D braid applicable in heavy operating tribology conditions

et al. 2022

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The phenomenon of wear and friction in a variety of environments, including dry, seawater, and high temperatures, has always been a source of contention.Designing and fabricating parts that can function optimally in these conditions, such as self-lubricating composites, is helpful. This work investigated the tribological and thermal properties of a three-dimensional braid composite consisting of PTFE yarns and three types of reinforcement in the hierarchical structure under different operating conditions. In this study, the effect of different speeds was considered as well as effect of load. Roughness (Rq) and wear rate of the worn surface were also taken into account while evaluating the friction coefficient. By the response surface method (RSM) and D-optimal design, the tests were planned experimentally so that the minimum test was performed. Statistical models from the analysis of experimental data by RSM revealed that the friction coefficient of all composites rises in dry conditions with increasing load and sliding speed. In contrast, in seawater conditions, the more difficult the test conditions, the friction took a positive trend. Glass fiber reinforced composites were temperature sensitive and behaved differently in different conditions. The most optimal cases were calculated and reported by the utility function. Furthermore, the coefficient of friction values obtained in all cases were desirable and reliable.

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Section: Introductionmentioning

confidence: 99%

Study on microstructure and tribological properties of hierarchical 3D braid applicable in heavy operating tribology conditions

et al. 2022

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“…The absorption of stresses generated during wear at the friction composite interface is mainly done by fibers. [3][4][5] Thanks to its intrinsic self-lubrication, high modulus/strength, and good thermal stability, carbon fiber can be used in various composites. 6 However, some works have yielded contradictory findings concerning the influence of carbon fiber on tribological behavior, indicating poor frictional properties.…”

Section: Introductionmentioning

confidence: 99%

On the tribology of complex 2D/3D composites bearing

Zahabi

Sheikhzadeh

Akbarzadeh

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part J:

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In the present work, a hierarchical braided polymer composite consists of Polytetrafluoroethylene (PTFE) fibers, reinforcement fibers, and epoxy resin was designed as a self-lubricant composite and bearing. Different reinforcements such as glass, carbon, and Kevlar fibers were employed to investigate the effect of reinforcement on the wear characteristics of composites. Besides, the influence of 2D/3D braid fabric was examined on the wear behavior of samples. Also, 90 and 120 N loads were applied to assess the load impact. Results illustrated that compared to glass and Kevlar, carbon could lead to a greater wear weight loss and friction coefficient. However, PTFE tribofilm was observed according to scanning electron microscopy (SEM)/energy-dispersive X-ray spectroscopy (EDS) analysis. Moreover, with the increase of load, the wear stability of the composites faded significantly. Furthermore, the tribological features became inappropriate with the deployment of the 3D braid structure. Finally, the modeling of tribological parameters was carried out using response surface methodology-based D-optimal design. The adequacy of the models was checked by analysis of variance. Results implied that there is an excellent correlation between the model and the experiments.

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The effect of composite structural parameters on tribo‐mechanical characteristics and thermal conductivity of self‐lubricant composites

2021

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This article aims to look into the impact of structural parameters on the tribological, mechanical, and thermal functions of composites. These parameters include the reinforcement type, the winding angle and winding type. The tribological characteristics of polytetrafluoroethylene (PTFE)/epoxy filament wound composites with various reinforcements including E-glass, Kevlar, and ultra-high-molecular weight polyethylene were examined under two different loads and the sliding velocity of 0.12 m/s. After the wear test, the worn surfaces were observed by scanning electron microscopy. The compressive strength of the composites was considered under static loading conditions to investigate the mechanical properties. Also, the thermal conductivity of the composites was investigated. Interfacial shear strength (IFSS) was measured by applying a single fiber microdroplet pullout test. The tribological and mechanical performance of the composites containing Kevlar reinforcement fibers was found to be better than that of PE and glass. The winding angle of 55 showed a better performance, and the hybrid winding type was more suitable than the layered one. So in general, it could be concluded that the hybrid-Kevlar/PTFE-55 composite exhibited the best tribological and mechanical performance among all composites. The thermal conductivity of hybrid-Kevlar/PTFE-55 composites was not high; therefore, it was increased by tungsten carbide (WC). According to the microdroplet test results, IFSS was the highest between Kevlar fibers and the matrix; it was raised by employing WC. The reported results may facilitate the development of self-lubricant composites embedded in WC fillers applicable in bearings.

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Evaluating the tribological and mechanical properties of filament wound composite incorporated with PTFE fibers and tungsten carbide filler applicable for self-lubricating bearings

Cited by 6 publications

References 44 publications

Study on microstructure and tribological properties of hierarchical 3D braid applicable in heavy operating tribology conditions

Study on microstructure and tribological properties of hierarchical 3D braid applicable in heavy operating tribology conditions

On the tribology of complex 2D/3D composites bearing

The effect of composite structural parameters on tribo‐mechanical characteristics and thermal conductivity of self‐lubricant composites

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