Distribution of Gaps and Adhesive Interaction Between Contacting Rough Surfaces

Monti, Joseph M.; Sanner, Antoine; Pastewka, Lars

doi:10.1007/s11249-021-01454-6

Cited by 11 publications

(3 citation statements)

References 51 publications

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“…3.4 Mechanism of electrical wear resistance of (CNTs-TiB 2 )/Cu composites In fact, the surface of the friction pair is uneven and consists of countless tiny contact points (Monti et al, 2021). The composites surface can be affected by friction current and arc repeatedly.…”

Section: Resultsmentioning

confidence: 99%

Electrical wear performance of copper matrix composites reinforced with hybrid CNTs and TiB₂ particles

Yang

Guo

Song

et al. 2022

ILT

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Purpose Copper matrix composites are widely used in high-voltage switches, electrified railways and other electric friction fields. The purpose of this study is to improve its wear resistance and investigate the effect of hybrid carbon nanotubes (CNTs) and titanium diboride (TiB2) particles reinforced copper matrix composites on electrical wear performance. Design/methodology/approach CNTs and TiB2 particles were introduced into copper matrix simultaneously by powder metallurgy combined with electroless copper plating. Electrical wear performance of the composites was studied on self-made pin on disk electrical wear tester. Findings The results show that the friction coefficient and wear rate of (1CNTs–4TiB2)/Cu composite are respectively reduced by 40% and 25.3%, compared with single TiB2/Cu composites. The micron-sized TiB2 particles can hinder the plastic deformation of composites, and bear part of the load to weaken the wear rate of composites. CNTs with the self-lubricating property can form lubricating layer to reduce the friction coefficient of composites. Originality/value This work can provide a design method for further improving the wear properties of TiB2/Cu composites.

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Section: Resultsmentioning

confidence: 99%

Electrical wear performance of copper matrix composites reinforced with hybrid CNTs and TiB₂ particles

Yang

Guo

Song

et al. 2022

ILT

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“…Note that these minimization algorithms require that the interaction potential has a continuous second derivative, justifying our choice of a third-order polynomial. BEM with hard-wall repulsion and finite-ranged attraction (Müser, 2014(Müser, , 2016Müser et al, 2017;Wang and Müser, 2017;Bazrafshan et al, 2017;Rey et al, 2017;Bugnicourt et al, 2018;Monti et al, 2021) or soft (Lennard-Jones type) repulsion (Greenwood, 1997;Feng, 2000;Wu, 2010;Medina and Dini, 2014;Robbins, 2014, 2016;Persson and Scaraggi, 2014;Monti et al, 2019;Ghanbarzadeh et al, 2020;Wang et al, 2021) have been used in the past to study the adhesion of spheres and rough surfaces. During retraction, these models are similar to fiber-bundle models of quasi-brittle fracture (Batrouni et al, 2002;Schmittbuhl et al, 2003;Stormo et al, 2012;Gjerden et al, 2013Gjerden et al, , 2014 and threshold-force models (Pohrt and Popov, 2015;Hulikal et al, 2017;Li et al, 2019).…”

Section: Reference Modelmentioning

confidence: 99%

Crack-front model for adhesion of soft elastic spheres with chemical heterogeneity

Sanner,

Pastewka

2021

Preprint

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Adhesion hysteresis can be caused by elastic instabilities that are triggered by surface roughness or chemical heterogeneity. However, the role of these instabilities in adhesion hysteresis remains poorly understood because we lack theoretical and numerical models accounting for realistic roughness. Our work focuses on the adhesion of soft elastic spheres with low roughness or weak heterogeneity, where the indentation process can be described as a Griffith-like propagation of a nearly circular external crack. We discuss how to describe the contact of spheres with chemical heterogeneity that leads to fluctuations in the local work of adhesion. We introduce a variational first-order crack-perturbation model and validate our approach using boundary-element simulations. The crack-perturbation model faithfully predicts contact shapes and hysteretic force-penetration curves, provided that the contact perimeter remains close to a circle and the contact area is simply connected. Computationally, the crack-perturbation model is orders of magnitude more efficient than the corresponding boundary element formulation, allowing for realistic heterogeneity fields. Furthermore, our crack-front formulation clarifies the connection of adhesion hysteresis to classic theories on pinning of elastic lines.

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“…The link between load and plastic deformation was established by Martínez et al [24,25]. In terms of the interfacial average separation, Müser et al [26] found the pressure dependence of the average separation and derived the distribution of separations between surfaces near the contact edge. It's easy to notice that the metallic contact mechanism investigated above are all under low contact pressure and with little yield hardening effect.…”

Section: Introductionmentioning

confidence: 99%

A novel analytic model for sealing performance of static metallic joint considering the yield hardening effect

Deng

Luo

Zhang

et al. 2023

Int J Adv Manuf Technol

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The static metallic joints' sealing performance is deeply impacted by the plastic deformation and the interfacial separation of the contact surfaces with self-affine roughness. The yield hardening effect, unavoidable at the contact interface, is of vital importance to the plastic deformation and the distribution of the interfacial separation. However, most of the previous research ignores the effect of the yield hardening, assuming that the contact surfaces are elastic-perfectly plastic. To address the problem, a novel analytic model for investigating the sealing performance under the effect of yield hardening has been developed in this paper. Utilizing the measured data of contact surfaces as input, the corresponding leakage rates are calculated. Besides, the contact stress distribution as well as the real contact area at the interface are also discussed. The sealing experiments are carried out accordingly, verifying that the proposed model owns the ability to predict the leakage rate under the effect of yield hardening.

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Distribution of Gaps and Adhesive Interaction Between Contacting Rough Surfaces

Cited by 11 publications

References 51 publications

Electrical wear performance of copper matrix composites reinforced with hybrid CNTs and TiB₂ particles

Electrical wear performance of copper matrix composites reinforced with hybrid CNTs and TiB₂ particles

Crack-front model for adhesion of soft elastic spheres with chemical heterogeneity

A novel analytic model for sealing performance of static metallic joint considering the yield hardening effect

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Distribution of Gaps and Adhesive Interaction Between Contacting Rough Surfaces

Cited by 11 publications

References 51 publications

Electrical wear performance of copper matrix composites reinforced with hybrid CNTs and TiB2 particles

Electrical wear performance of copper matrix composites reinforced with hybrid CNTs and TiB2 particles

Crack-front model for adhesion of soft elastic spheres with chemical heterogeneity

A novel analytic model for sealing performance of static metallic joint considering the yield hardening effect

Contact Info

Product

Resources

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Electrical wear performance of copper matrix composites reinforced with hybrid CNTs and TiB₂ particles

Electrical wear performance of copper matrix composites reinforced with hybrid CNTs and TiB₂ particles