Thermal analysis and tribological investigation on TPU and NBR elastomers applied to sealing applications

Pinedo, B.; Hadfield, M.; Tzanakis, Iakovos; Conte, Marcello; Anand, Mayank

doi:10.1016/j.triboint.2018.05.032

Cited by 55 publications

(30 citation statements)

References 18 publications

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“…The TESSA machine has been developed by TEKNIKER to measure the friction, wear, and leakage of the dynamic seals [23][24][25][26][27][28]. It can reach a maximum speed of 6 m/s.…”

Section: The Tessa Machinementioning

confidence: 99%

“…The authors also acknowledge the cooperation and/or financing of the industries and research institutions participating in each project. The authors made special mention to those members of the tribology team, that completed their Doctoral Thesis for their contribution to the knowledge generated: Bihotz Pinedo (Tribology of seals 2016) [23][24][25]27], Borja Zabala (high Temperature Tribology (eg. moulds, engines) 2017) [20,22,42,43,46,52], Francesco Pagano, (tribology of ionic liquids and vacuum tribology, 2017) [2-4, 13, 57-65], Beatriz Fernandez-Diaz (tribology of polymers, 2017) [28,34,63], Virginia Saenz de Viteri (biotribology, 2016) [30,31,56,57], Sofia Alves (dental tribology, 2017) [58], Cristina Cerrillo (ecotoxicity of nanoparticles, 2016) [71][72][73][74][75], Ainara López (marine and off shore tribology, 2018) [12][13][14][15][16].…”

Section: Acknowledgementsmentioning

confidence: 99%

See 1 more Smart Citation

Tribology: The Tool to Design Materials for Energy-Efficient and Durable Products and Process

Igartua¹,

Bayón²,

Aranzabe³

et al. 2019

Friction, Lubrication and Wear

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This chapter describes a summary of the main tribological achievements carried out in TEKNIKER during the last 37 years. It covers the description of commercial and newly developed tribological test benches and case studies for a wide variety of applications. The examples refer to different tribological characterization tools for material selection (e.g., composition, surface treatments, lubricants). It makes emphasis in the failure mechanisms (pitting, scuffing, abrasion, adhesion, thermal fatigue, tribocorrosion, etc.) and friction simulation of a wide range of materials (seals, textiles, steels, cast iron, light alloys, ceramic, composites), tribological systems (mechanical components, biomaterials, tribolubrication), and environments (vacuum, ultrahigh vacuum, low or high temperature, and corrosive). A huge range of new testing equipment and protocols have been developed to simulate the mentioned failure mechanisms and working environments. This knowledge will make possible, in the future, to simulate at laboratory a still wider list of tribological systems and develop new standards. Tribology will help to implement materials solutions into energy and resource efficient products and process, to reduce carbon footprint.2 with more than 250 scientific contributions in congresses, journals, and books and 3 patents. It has been active in several international working groups and associations, in some of them, acting as Spanish representative:• The COST 516 about tribology (1995)(1996)(1997)(1998)(1999)(2000) • The COST 532 about tribotechnology of engines and transmissions

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“…The TESSA machine has been developed by TEKNIKER to measure the friction, wear, and leakage of the dynamic seals [23][24][25][26][27][28]. It can reach a maximum speed of 6 m/s.…”

Section: The Tessa Machinementioning

confidence: 99%

Section: Acknowledgementsmentioning

confidence: 99%

Tribology: The Tool to Design Materials for Energy-Efficient and Durable Products and Process

Igartua¹,

Bayón²,

Aranzabe³

et al. 2019

Friction, Lubrication and Wear

View full text Add to dashboard Cite

show abstract

“…Pinedo et al. 14 investigated on the influence of frictional heating on the temperature rise and how frictional heating can affect the tribological properties of TPU and NBR elastomers. Recent studies show that upon reduction of reinforcement size to the sub-micron or nano-scale, the wear and friction performance of polymer composites may become significantly better compared to that of micro-particle filled systems.…”

Section: Introductionmentioning

confidence: 99%

A molecular dynamics-based investigation on tribological properties of functionalized graphene reinforced thermoplastic polyurethane nanocomposites

Talapatra

Datta

2020

Proceedings of the Institution of Mechanical Engineers, Part J:

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Tribo-mechanical properties of pure thermoplastic polyurethane and functionalized monolayer graphene-reinforced thermoplastic polyurethane polymer nanocomposites are investigated by molecular dynamics simulations. Initially, the mechanical properties of the thermoplastic polyurethane and functionalized monolayer graphene-reinforced thermoplastic polyurethane nanocomposites are measured by applying constant stain method. Subsequently, interfacial layer models are developed to apply confined shear on the iron layers to find out the coefficient of friction and the abrasion rate of pure thermoplastic polyurethane and functionalized monolayer graphene-reinforced thermoplastic polyurethane nanocomposites. The results imply that by the incorporation of 0.5 wt.% functionalized monolayer, graphene shows the increase of 20% in Young’s modulus, 15% in shear modulus and 6.66% in bulk modulus of pure thermoplastic polyurethane, respectively, which are in good agreement with the previous experimental studies. Maximum enhancement of mechanical properties can be obtained up to 3 wt.% addition of functionalized monolayer graphene addition in thermoplastic polyurethane matrix. Further, it is observed that 3 wt.% of functionalized monolayer graphene-reinforced thermoplastic polyurethane nanocomposite results in minimum coefficient of friction (0.42) and abrasion rate (19%) under constant normal load (5 kcal/mol/Å) and maximum sliding velocity (11 m/s). However, further reduction in minimum values of coefficient of friction and abrasion rate at 3 wt.% of functionalized monolayer graphene-reinforced thermoplastic polyurethane nanocomposites is seen under the minimum sliding velocity (1 m/s) considered with the same normal load condition. Finally, the inherent mechanisms for enhancement of tribo-mechanical properties in functionalized monolayer graphene-reinforced thermoplastic polyurethane nanocomposites are analysed by the atomic density profile, free volume and Connolly surface at the atomic level.

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“…The friction coefficient, of the 1/3 spherical texture sample with an area density of 38%,was reduced by 64.47% under 0.7 MPa and 250 r/min, and the wear mass was also the lowest. Pinedo et al 13 established the relationship between friction and heat generated during the TPU material friction process. They showed that the friction coefficient and the temperature curve had the same overall tendency, indicating that the surface temperature of the material was related to the friction energy generated.…”

Section: Introductionmentioning

confidence: 99%

Development of modified polyacrylonitrile fibers for improving tribological performance characteristics of thermoplastic polyurethane material in water‐lubricated sliding bearings

Liang

Guo

Tian

et al. 2020

Polymers for Advanced Techs

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Thermoplastic polyurethane (TPU) is one of the most popular marine bearing materials because of its excellent characteristics. However, severe wear often occurs under some extreme conditions. In order to improve the service life of bearing material, this work introduced the polyacrylonitrile (PAN) fiber as a reinforcement material to further enhance TPU tribological properties. Considering that the bearing material does not process self-lubricating or cannot form a stable water film under some working conditions, the PAN fiber was hydrophilically modified to alleviate this problem. The effects of fiber addition, operation speed, and applied load on the tribological properties of the composites were examined by using a tribo-tester. The friction coefficient of the samples, the surface morphology after rubbing, and the wear loss, and so on, were also comprehensively analyzed. It was found that the friction coefficient of 30% modified PAN fiber at 500 r/min and 0.8 MPa load was 0.08, and its friction coefficient was 81.8% lower than the pure sample under the same working condition, this is mainly due to the high hydrophilicity of the modified PAN fiber, which makes it easier to form a water film between the composite material and the copper disc. Furthermore, adhesive wear occurred in unmodified samples, while modified samples contained abrasive wear. This new material modification method and design idea can be used for improving the performance of water-lubricated bearing materials. K E Y W O R D S modified PAN fiber, tribological properties, water-lubricated bearing 1 | INTRODUCTION As an important part of ship propulsion, the marine propeller shaft system provides the needed power for the ship. Because the stern tube bearing connects the propeller shaft, it is crucial to the safety and reliability of the whole mechanism. 1-3 Since the emergence of the oil resource crisis in the 1970s and the awareness of green environmental protection in recent years, water-lubricated bearings have attracted a lot of research attention. Water-lubricated bearings, using water as the lubricant and working medium, can prevent the pollution of the marine environment caused by lubricant oil leakages from traditional bearings. 4 However, water-lubricated bearings often experience severe friction and wear under extreme conditions such as starting, stopping, operating at low speed, and under heavy load, which greatly reduce the service life of the bearing. This is because it is difficult for the water-lubricated bearing friction pair to form a stable water film in boundary lubrication or even drive the bearing into the dry friction state. 5,6 Therefore, enhancing the lubrication performance of the stern bearing, especially its self-lubricating performance under boundary lubrication and dry friction, is of great significance for improving the efficiency, safety performance, and service life.

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Thermal analysis and tribological investigation on TPU and NBR elastomers applied to sealing applications

Cited by 55 publications

References 18 publications

Tribology: The Tool to Design Materials for Energy-Efficient and Durable Products and Process

Tribology: The Tool to Design Materials for Energy-Efficient and Durable Products and Process

A molecular dynamics-based investigation on tribological properties of functionalized graphene reinforced thermoplastic polyurethane nanocomposites

Development of modified polyacrylonitrile fibers for improving tribological performance characteristics of thermoplastic polyurethane material in water‐lubricated sliding bearings

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