Non-lubricated friction of polybutylene terephthalate (PBT) sliding against polyoxymethylene (POM)

Chaudri, Adil M.; Suvanto, Mika; Pakkanen, Tuula T.

doi:10.1016/j.wear.2015.08.023

Cited by 19 publications

(7 citation statements)

References 35 publications

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“…The coefficient of friction used in the contact was 0.32. This value was chosen as a conservative estimate based on relevant data about friction coefficients of POM and PEEK materials, which are usually peeking slightly above 0.3 at room temperature [ 37 , 38 , 39 , 40 ]. However, the friction coefficient can significantly vary for different blends of the same polymer.…”

Section: Numerical Modelsmentioning

confidence: 99%

Crack Propagation Analysis of Compression Loaded Rolling Elements

et al. 2021

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The problem of crack propagation from internal defects in thermoplastic cylindrical bearing elements is addressed in this paper. The crack propagation in these elements takes place under mixed-mode conditions—i.e., all three possible loading modes (tensile opening mode I and shear opening modes II and III) of the crack are combined together. Moreover, their mutual relation changes during the rotation of the element. The dependency of the stress intensity factors on the crack length was described by general parametric equations. The model was then modified by adding a void to simulate the presence of a manufacturing defect. It was found that the influence of the void on the stress intensity factor values is quite high, but it fades with crack propagating further from the void. The effect of the friction between the crack faces was find negligible on stress intensity factor values. The results presented in this paper can be directly used for the calculation of bearing elements lifetime without complicated finite element simulations.

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Section: Numerical Modelsmentioning

confidence: 99%

Crack Propagation Analysis of Compression Loaded Rolling Elements

et al. 2021

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“…The friction and wear performance of PBT have been investigated mostly under dry friction. 8,9 It is generally accepted that the neat PBT matrix is damaged mainly by adhesive wear initiated by frictional heat generated due to asperity contact, leading to subsequent microcracking. 10,11 The reinforcement mechanism of fillers such as fibers, [12][13][14][15][16][17][18] metal oxides, [19][20][21] clays, 22 and carbon materials 23,24 ranging from the nanometer to micrometer scale have also been reported, and different types of composites have been developed.…”

Section: Introductionmentioning

confidence: 99%

“…PBT is a cost‐effective thermoplastic polyester that is extensively applied as a lubricating component in marine engineering. The friction and wear performance of PBT have been investigated mostly under dry friction 8,9 . It is generally accepted that the neat PBT matrix is damaged mainly by adhesive wear initiated by frictional heat generated due to asperity contact, leading to subsequent microcracking 10,11 .…”

Section: Introductionmentioning

confidence: 99%

Fluorinated graphite reinforced polytetrafluoroethylene/poly(butylene terephthalate) composites as friction materials for deep‐sea applications

Su,

Wang,

Liu

et al. 2024

J of Applied Polymer Sci

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The application of polymer composites is one of the most effective methods for preventing lubrication failure in deep‐sea engineering. In this study, fluorinated graphite (FGr) microsheets were incorporated into polytetrafluoroethylene (PTFE) microparticle‐filled poly(butylene terephthalate) (PBT) composites. The tribological performance in the simulated deep‐sea environment at elevated seawater pressure equivalent to 3000 m ocean depth was investigated. The results showed that FGr enhances the flexural and compressive strengths, thermal stability, and seawater resistance of the PTFE/PBT composite. The wear rate was decreased to 96% at the critical FGr content of 4% by improving the transfer onto the metallic counterfaces, preventing direct contact and shear between friction couples. Moreover, the seawater pressure impedes composite transfer, leading to a 29% increase in the wear rate.

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“…Cho et al [19] investigated the effect of surface texturing on the friction of POM and determined that the lowest friction coefficient was obtained with a 10% texturing density. Chaudri et al [20] investigated the frictional performance of PBT + PTFE pin sliding against POM; the results indicated that the decrease in friction at higher loads is due to softening of the PBT pin by frictional heating.…”

Section: Introductionmentioning

confidence: 99%

Combined effect of the use of carbon fiber and seawater and the molecular structure on the tribological behavior of polymer materials

Wang

Gao

2017

Friction

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Abstract:The combined effect of the use of carbon fiber and seawater and the molecular structure on the tribological behavior of various polymer materials under natural seawater lubrication was investigated. After the investigation, the wear morphology of the contact surface was observed by a laser scanning confocal microscope, and the texture of the wear scars and tracks were presented in 3D profiles. Moreover, the mechanism of mixed lubrication and wear resistance was analyzed. The results demonstrated that the friction coefficient of carbon fiber-reinforced polyetheretherketone (CFRPEEK) is the lowest and fluctuates at approximately 0.11. Moreover, the seven polymer materials in ascending order of friction coefficients are CFRPEEK, carbon fiber-reinforced polyamide-imide, polytetrafluoroethylene, polyoxymethylene, polyetheretherketone (PEEK), acrylonitrile butadiene styrene resin, and glass fiber-epoxy resin. More critically, the simultaneous incorporation of deposition, polymeric scrap, hydrophilic groups, and seawater resulted in a decrease in the friction and wear of polymer materials under seawater lubrication. This observation implies that a synergistic friction-reducing and wear-resistant effect exists between carbon fiber, seawater, and the molecular structure of PEEK. As a result, a highly effective polymer material was discovered, CFRPEEK, which has the lowest friction coefficient of 0.11 and lowest wear rate of 2 × 10 -5 mm 3 ·(N·m) −1 among the polymer materials; this validates the selection of dual friction pairs for seawater hydraulic components.

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Non-lubricated friction of polybutylene terephthalate (PBT) sliding against polyoxymethylene (POM)

Cited by 19 publications

References 35 publications

Crack Propagation Analysis of Compression Loaded Rolling Elements

Crack Propagation Analysis of Compression Loaded Rolling Elements

Fluorinated graphite reinforced polytetrafluoroethylene/poly(butylene terephthalate) composites as friction materials for deep‐sea applications

Combined effect of the use of carbon fiber and seawater and the molecular structure on the tribological behavior of polymer materials

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