Atomistic simulation of the sliding of a rigid indenter over aluminum with crystalline defects

Bortoleto, Eleir Mundim; Souza, R.M.; Cuppari, M. G. V.

doi:10.1016/j.triboint.2014.07.016

Cited by 3 publications

(2 citation statements)

References 20 publications

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“… Using a numerical approach based on continuum mechanics, we produced results that are consistent with those obtained previously in molecular dynamics simulations [25,29].…”

Section: Resultssupporting

confidence: 83%

Numerical modeling of adhesion and adhesive failure during unidirectional contact between metallic surfaces

et al. 2016

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Abstract:In this work, we developed a finite element modeling approach to study adhesion during unidirectional contact between a two-dimensional plane-strain square and a flat slab. The surfaces were metallic or ceramic, and we analyzed different pairs of materials and their adhesion intensity using a FORTRAN subroutine (DLOAD) connected to a commercial finite element code Abaqus, which provided the surface attractive forces based on the Lennard-Jones interatomic potential using Hamaker constants. We considered adhesive loads during both the approach and separation of the surfaces. During the separation step, we modeled the material transfer between surfaces due to adhesion with respect to damage initiation and propagation at the flat slab. The parameters considered in the simulations include normal load, chemical affinity, and system size, and we analyzed different conditions by comparing the interaction forces during approach and withdrawal. This work also presents: (i) a description of the evolution of energy dissipation due to adhesion hysteresis, (ii) the formation-growth-breakage process of the adhesive junctions and the material transfer between surfaces, and (iii) an adhesive wear map based on a proposed novel equation that correlates the material parameters and material loss due to adhesion. The results indicate that the chemical affinity between bodies in contact is more related to adhesion than the applied load. In addition, the ratio between the material strength and elastic modulus seems to be an important factor in reducing adhesive wear.

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“… Using a numerical approach based on continuum mechanics, we produced results that are consistent with those obtained previously in molecular dynamics simulations [25,29].…”

Section: Resultssupporting

confidence: 83%

Numerical modeling of adhesion and adhesive failure during unidirectional contact between metallic surfaces

et al. 2016

Self Cite

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“…Meanwhile, the unveiling of friction mechanism at atomic scale will provide the guiding for finding the new solid lubrication materials which have the better lubrication performance. Along with the developments of molecular dynamic, first-principle theories and the appearance of atomic force microscopy (AFM), scientists have made a great progress [26][27][28][29][30][31][32][33][34] on atomic-scale tribological mechanism involving these solid lubrication materials and metals interfaces. Therefore, this paper aims at reviewing the theoretical advances which are associated with atomic-scale friction of solid sheet in recent years, from the respects of first-principle calculation, molecular dynamic and AFM experiments.…”

Section: Introductionmentioning

confidence: 99%

Advances in atomic-scale tribological mechanisms of solid interfaces

Nian

Guo

2016

Tribology International

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Brazilian Tribology: origin, status quo and future perspectives

de Mello,

Costa

2023

Surf. Topogr.: Metrol. Prop.

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This first regional issue published in STMP highlights the potential and importance of the research carried out in Latin America regarding surface engineering and tribology. In order to celebrate this important initiative, a complete historical account of Brazilian tribology is presented for the first time. It initiates with the first steps of Brazilian tribology in the 1980s, followed by the evolution and expansion of tribology research both in academic centres and industry. Focus is given to two outstanding achievements of Brazilian tribology: the fully flexible engines that run at any proportion of ethanol and gasoline and a fully innovative, completely oil-less family of hermetic compressors. The status-quo of the current research groups on tribology is described. Finally, the future trends envisaged by the Brazilian tribology community are presented.

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Atomistic simulation of the sliding of a rigid indenter over aluminum with crystalline defects

Cited by 3 publications

References 20 publications

Numerical modeling of adhesion and adhesive failure during unidirectional contact between metallic surfaces

Numerical modeling of adhesion and adhesive failure during unidirectional contact between metallic surfaces

Advances in atomic-scale tribological mechanisms of solid interfaces

Brazilian Tribology: origin, status quo and future perspectives

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