Sliding wear behavior of polymers studied with mesoscopic molecular dynamics

Brostow, Witold; Khoja, Sameer; Simões, Ricardo

doi:10.1007/s10853-016-0418-2

Cited by 8 publications

(6 citation statements)

References 18 publications

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“…Through the computational simulation of polymers, the complex behavior of highly complex polymeric systems can be understood deeply. Coarse grain techniques using united atoms [4][5][6][7][8][9][10][11][12] have been widely used to simulate polymer systems and obtain deformation behaviour at different lengths and time scales. A large number of reports have dealt with the plastic deformation within amorphous polymers, where the shear stress drives plastic deformation in glassy polymers to induce structural change.…”

Section: Introductionmentioning

confidence: 99%

Revealing the deformation mechanism of amorphous polyethylene subjected to cycle loadingviamolecular dynamics simulations

Fang

Tian

et al. 2018

RSC Adv.

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Section: Introductionmentioning

confidence: 99%

Revealing the deformation mechanism of amorphous polyethylene subjected to cycle loadingviamolecular dynamics simulations

Fang

Tian

et al. 2018

RSC Adv.

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“…Molecular dynamics (MD) simulation is considered as one of the most influential tool to predict the properties at the molecular level. Brostow et al [36] proposed characterization methodology and new methods of studying static and dynamic friction. The scratch testing of polymers using molecular dynamics simulation has been studied [37].…”

Section: Research Onmentioning

confidence: 99%

“…Brostow et al [39] using MD simulation studied the sliding wear behavior of a coarse-grained model of high-density polyethylene (HDPE). The increase in scratching force leads to higher penetration depths and lower recovery depths.…”

Section: Research Onmentioning

confidence: 99%

Sliding Tribological Behavior of Carbon Nanotube/Natural Rubber Composites

Chawla¹

2018

Tribol. Ind.

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A computational study has been made to investigate the tribological properties of carbon nanotube reinforced natural rubber composites as a function of sliding velocity at a normal loading. A three-layer model in which top and bottom layer using Iron atoms and the middle part with natural rubber matrices are constructed. Results obtained from simulations reveal that increase in sliding velocity 0.1 Å /ps to 0.11 Å /ps significantly decrease the coefficient of friction and abrasion rate. The addition of carbon nanotube to the natural rubber matrix decrease the average coefficient of friction and abrasion rate 24 % and 17 %, respectively.

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“…Bunlarla birlikte, günümüzde çok sayıda yenilenemez enerji kaynaklarımızın sürtünmeyi yenmek için kullanıldığı ve birçok mekanik sistem hatasının aşınmadan dolayı kaynaklandığı artık iyi bilinmektedir [3]. Bu nedenle makina elemanlarının tribolojik özelliklerinin (sürtünme, aşınma ve yağlama) incelenmesi büyük önem arz etmektedir [4].…”

Section: Gi̇ri̇ş (Introduction)unclassified

MOS2 ve Grafit kaplamaların farklı ortam şartlarında tribolojik özelliklerinin araştırılması

Erdem

İmece²,

Tuc

2018

Gazi Üniversitesi Mühendislik-Mimarlık Fakültesi Dergisi

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Highlights:Graphical/Tabular Abstract  The designing and manufacturing of pindisc type tribometer  Wear experiments under different environmental conditions  The statistical calculation of the coating lifetime for a specific reliability value A pin-disc type tribometer was designed and manufactured for wear and friction tests. Figure A. The variation of average friction coefficients by different experiment weights Purpose: The aim of this study is to investigate tribological properties of MoS2 and graphite coatings under different environmental conditions. Theory and Methods:In this study, 10 mm in diameter and 20 mm length made of AISI1008 steel samples coated with graphite and MoS2 powders which widely used today as a solid lubricant with lead-spinning method. The experiments were carried out under three different environment; dry, oily and oil + 5% Molykote-A added. The properties of the abrasioned surfaces of the samples were investigated by optical microscope and scanning electron microscope. For 30%, 60% and 95% reliability values, the lifetime values of MoS2 and graphite coatings were statistically calculated. Results:In dry environment, MoS2 and graphite coatings were found to reduce friction by an average of 42% and 51%, respectively. The friction coefficients for MoS2 and graphite coatings in oily medium, were respectively about 10 times and 8 times lower than those in dry environment. In investigation of abrasioned surfaces, it was seen that scratch marks and locally metal regions on abrasioned surfaces which had worn in dry environment. In case of oily environmental, the coatings were superficially worn and no metal region was seen on abrasioned surfaces. The coating lifetime for MoS2 coated sample was calculated to be approximately 31.7 minutes and the lifetime for the graphite coated sample approximately 32 minutes. Conclusion:According to the results of the experiments, it has been found that coating any machine element surfaces with MoS2 or graphite can dramatically reduce the friction coefficient under dry environment. Limit of no use thickness (15 μm) that is also coating thicknesses of MoS2 ang graphite coated samples can withstand abrasion for approximately 32 minutes for 95% reliability with a test weight of 2 kg in dry environment.

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Sliding wear behavior of polymers studied with mesoscopic molecular dynamics

Cited by 8 publications

References 18 publications

Revealing the deformation mechanism of amorphous polyethylene subjected to cycle loadingviamolecular dynamics simulations

Revealing the deformation mechanism of amorphous polyethylene subjected to cycle loadingviamolecular dynamics simulations

Sliding Tribological Behavior of Carbon Nanotube/Natural Rubber Composites

MOS2 ve Grafit kaplamaların farklı ortam şartlarında tribolojik özelliklerinin araştırılması

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