Numerical simulation of the dynamic evolution of the friction interface of PTFE/45 steel friction pair

Xie, Ting; Chen, Kun; Zhou, Zhenghua; Yang, Huaping

doi:10.1088/2053-1591/ab3abf

Cited by 7 publications

(6 citation statements)

References 14 publications

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“…In the process of manufacturing and during high-temperature application, interfacial reactions of SiC f /TC4 occurred between the fibres and the matrix to varying degrees, forming interfacial layers due to the chemical activity of Ti. When the stresses and displacements of the fibres and the matrix are continuous at their common boundary, the corresponding interface is called the ideal interface [24]. If either of the boundary conditions for stress or displacement continuity cannot be met, the interface is called non-ideal.…”

Section: Model Modificationmentioning

confidence: 99%

Modification of the model for calculating the long SiC fibre-reinforced metal matrix composites transverse strength and study for interfacial influences

Luo,

Sha

2023

Mater. Res. Express

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The transverse strength of long SiC fibre-reinforced metal matrix composites is superior to its longitudinal strength owing to interface factors. To accurately predict the transverse strength of long SiC fibre-reinforced metal matrix composites, a micro-mechanics representative volume element (RVE) model was developed; periodic boundary conditions were applied to the model to ensure its displacement and stress continuity. Taking into account the influence of the stress concentration coefficient of the matrix, the failure strength of long SiC fibre-reinforced metal matrix composites under transverse tensile loads and compressive loads were calculated, where the error between the calculation results of the model and the test results was found to be large. A novel calculation method based on the interfacial cohesion model is proposed herein, to improve the accuracy of the RVE model. It was found that the accuracy of the corrected model calculation has been improved through a comparison with the experimental values. The stress/strain relationship between interfaces of different strengths under tensile and compressive loads was analysed, the failure index of interface strength was extracted, and the relationship between the influence of interface strength on failure was determined.

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Section: Model Modificationmentioning

confidence: 99%

Modification of the model for calculating the long SiC fibre-reinforced metal matrix composites transverse strength and study for interfacial influences

Luo,

Sha

2023

Mater. Res. Express

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“…In this work, the PFC2D software is used to establish the mathematical model of the friction system, and the computational model and method similar to our previous work [18,19,22]. The flow chart of the simulation process by PFC2D is shown in Fig.…”

Section: Model Of the Friction Pairs And The Micro-parametersmentioning

confidence: 99%

“…Zhang et al [17] researched binary system powders by the discrete element method. Xie et al [18,19] studied the dynamic evolution of the PTFE/45 steel friction pair friction interface, and analyzed the friction transfer of PTFE.…”

Section: Introductionmentioning

confidence: 99%

Simulation of Effect of Force Chain on Graphite Migration of Copper Based Graphite Composites During Friction

Chen¹,

Xie²,

Zhang³

et al. 2021

Preprint

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To further reveal the mechanism of graphite migration in copper based graphite composites sliding against 45 steel, the particle Flow Code in 2 Dimensions (PFC2D) was employed to simulate and analysis the relationship between internal force chain and graphite migration in the composites. The simulation results show that a migrated graphite particle layer is formed on the composite surface during friction, and maintains dynamic equilibrium relying on “self-consumption”. The graphite migration displacement to the friction surface is affected by the force chain. The greater the force chain strength is, the smaller the graphite migration displacement is. When the force chain angle is in the range of 75° to 95°, the migration of the graphite particles can not occur; when the angle is 95° to 135°, the graphite migration displacement increases with the increase of the angle. And the greater force chain strength corresponds to the less worn particles and the less migrated graphite particles. The simulation results are significant for optimizing material design and improving the friction performances of copper based graphite composites.

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“…Considering the advantages of DEM in research of the particle motion, the DEM is employed to study the friction and wear process. [16][17][18] The simulation results were verified by a self-made in-situ observation tribometer. The studied results are significant for studying the migration law of solid lubricant and optimizing material structure design.…”

Section: Introductionmentioning

confidence: 99%

Using DEM method to study graphite migration of copper-based graphite composites during friction

Chen

Xie

Zhang

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part J:

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The self-lubrication of copper-based graphite composites depends on the formation of a graphite lubricating film on the frictional interface, which results from the graphite migration from the matrix. In fact, the graphite migration process is difficult to observe and record during friction by experimental methods. In our work, a discrete element method (DEM) software “the Particle Flow Code in 2 Dimensions (PFC2D)” was employed to simulate and analyze the graphite migration dynamic process of copper-based graphite composites sliding against 45 steel. The simulation results show that a migrated graphite particle layer was formed on the composite surface during friction, and maintained dynamic equilibrium relied on graphite migration from the matrix. The graphite migration was affected by applied load: the larger the applied load was, the greater the migration depth and number of migration particles were. And the sliding speed has little effect on graphite migration. With increase of graphite content, the migration depth first decreased and then increased, and the number of migration particles increased. With increase of graphite cluster size, the migration depth first decreased and then increased, and the number of migration particles decreased. The simulation results were verified by test analysis on a self-made in-situ observation tribometer, the test results was consistent with simulation results.

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Numerical simulation of the dynamic evolution of the friction interface of PTFE/45 steel friction pair

Cited by 7 publications

References 14 publications

Modification of the model for calculating the long SiC fibre-reinforced metal matrix composites transverse strength and study for interfacial influences

Modification of the model for calculating the long SiC fibre-reinforced metal matrix composites transverse strength and study for interfacial influences

Simulation of Effect of Force Chain on Graphite Migration of Copper Based Graphite Composites During Friction

Using DEM method to study graphite migration of copper-based graphite composites during friction

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