A micro-slip friction modeling approach and its application in underplatform damper kinematics

Li, Dongwu; Botto, Daniele; Xu, Chao; Liu, Tong; Gola, Muzio

doi:10.1016/j.ijmecsci.2019.105029

Cited by 31 publications

(10 citation statements)

References 26 publications

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“…The mathematical relationship between nonlinear friction force and relative displacement on the contact surface is described in the friction model, and this friction model can be divided in to Macro-slip model and Micro-slip model [43][44][45]. In this article, the Macro-slip model is employed owing to the almost same accuracy and less calculation cost.…”

Section: Marco-slip Friction Modelmentioning

confidence: 99%

Modeling and analysis of the friction in a nonlinear sliding-mode triboelectric energy harvester

Tan

Zhou

Wang

et al. 2021

Preprint

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Friction plays a pivotal role in the sliding-mode triboelectric energy harvester (TEH), which not only enables the charge transfer between two dielectrics, but also influences the energy harvesting performance by affecting the dynamic response of the TEH. How to evaluate the effects of the friction on TEHs is important for optimizing TEHs in engineering practices. In order to analyze the effects of the friction on the dynamic response and evaluate the energy harvesting performance of TEHs, the paper models the friction of a devised nonlinear TEH based on the Coulomb friction model and the Macro-slip friction theory. The TEH equips a pair of magnets, rendering a switching between the bistability and the monostability by tuning the distance between two magnets. The dynamic model of the nonlinear TEH is established by the extended Hamilton principle. The effects of the friction in sliding-mode TEH are dissected in detail. The influences of parameters on both the mechanical and electrical responses are also systemically studied, to explore an optimal energy harvesting performance in the low-frequency range. This work provides a guideline for designing and accurately analyzing a sliding-mode TEH.

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Section: Marco-slip Friction Modelmentioning

confidence: 99%

Modeling and analysis of the friction in a nonlinear sliding-mode triboelectric energy harvester

Tan

Zhou

Wang

et al. 2021

Preprint

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“…Li et al [ 15 ] proposed a new method for solving the DF based on the Hertzian pressure distribution. Zhao et al [ 16 ] proposed a technique based on the linear pressure distribution to solve the DF.…”

Section: Introductionmentioning

confidence: 99%

Finite Element Analysis of Elastoplastic Elements in the Iwan Model of Bolted Joints

et al. 2022

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The Iwan model is composed of elastoplastic elements and is widely used to represent the stiffness degradation of bolted joints under mixed-mode loading (normal and tangential loading). The latest static methods of parameter identification established the relationship between the elastoplastic elements and the contact pressure under normal loading. Under mixed-mode loading, the parameters of the Iwan model are dynamic for the evolution of contact conditions. Therefore, static parameter identification methods are not suitable for the dynamic Iwan model. A new technique was proposed to identify the parameters of the elastoplastic elements in this paper. Firstly, several different finite element models were established. The influence of the contact method and the thread structure were analyzed, and a reliable and efficient bolted-joint modeling method was proposed. Secondly, the evolution of contact conditions was studied. The dynamic elliptical contact model and the ellipticity discrete method were proposed. Finally, the residual stiffness of the Iwan model was analyzed to establish the mapping between the residual stiffness and the bending of the screw. The results can provide a technique for identifying the parameters of the dynamic Iwan model.

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“…Coating is very important in additively manufactured components, in which dry friction contacts play a fundamental role in fatigue failures [ 8 , 9 ]. Li et al [ 10 , 11 ] studied frictional contact over the physical contacted surfaces. Another surface treatment method used for alteration of tribological performance is ion implantation .…”

Section: Introductionmentioning

confidence: 99%

Tribological Characterization of Electrical Discharge Machined Surfaces for AISI 304L

et al. 2022

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Surface treatments are normally carried out after machining. Surface treatment is a costly and time-consuming process. Hence, it makes sense to reduce the requirement of surface treatment as much as possible. Electrical Discharge Machining (EDM) is a frequently used machining process. EDM produces a recast layer on the surface of machined components. The tribological performance of this recast layer is not very well understood. The properties of the recast layer formed as a result of EDM depend upon the discharge current, electrodes and dielectrics. This work aims to study the effects of each on the tribological performance – in terms of the wear depth, friction coefficient, friction force and contact surface temperature of recast layers. Subsequent improvement in the quality of surfaces will significantly reduce the cost and time required to treat surfaces after machining. Hence, various combinations of discharge current, dielectrics and electrodes have been used to characterize and deduce their effects. The tribo-tests are performed in the boundary lubrication regime under pin-on-disc configuration to analyze sliding friction, contact surface temperature and the wear of the recast layers formed on AISI 304L. The surface morphology of the test pins has been performed by Scanning Electron Microscopy (SEM) before and after the tests. The results show that indeed it is possible to control the tribological performance of the recast layers by varying EDM parameters. This approach promises to be a useful methodology to improve the tribological performance of the layers formed after EDM and reduce the time and costs required for surface treatments post machining.

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A micro-slip friction modeling approach and its application in underplatform damper kinematics

Cited by 31 publications

References 26 publications

Modeling and analysis of the friction in a nonlinear sliding-mode triboelectric energy harvester

Modeling and analysis of the friction in a nonlinear sliding-mode triboelectric energy harvester

Finite Element Analysis of Elastoplastic Elements in the Iwan Model of Bolted Joints

Tribological Characterization of Electrical Discharge Machined Surfaces for AISI 304L

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