Cargando…

Evidence of friction reduction in laterally graded materials

In many biological structures, optimized mechanical properties are obtained through complex structural organization involving multiple constituents, functional grading and hierarchical organization. In the case of biological surfaces, the possibility to modify the frictional and adhesive behaviour c...

Descripción completa

Detalles Bibliográficos
Autores principales: Guarino, Roberto, Costagliola, Gianluca, Bosia, Federico, Pugno, Nicola Maria
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Beilstein-Institut 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6142729/
https://www.ncbi.nlm.nih.gov/pubmed/30254839
http://dx.doi.org/10.3762/bjnano.9.229
_version_ 1783355883926847488
author Guarino, Roberto
Costagliola, Gianluca
Bosia, Federico
Pugno, Nicola Maria
author_facet Guarino, Roberto
Costagliola, Gianluca
Bosia, Federico
Pugno, Nicola Maria
author_sort Guarino, Roberto
collection PubMed
description In many biological structures, optimized mechanical properties are obtained through complex structural organization involving multiple constituents, functional grading and hierarchical organization. In the case of biological surfaces, the possibility to modify the frictional and adhesive behaviour can also be achieved by exploiting a grading of the material properties. In this paper, we investigate this possibility by considering the frictional sliding of elastic surfaces in the presence of a spatial variation of the Young’s modulus and the local friction coefficients. Using finite-element simulations and a two-dimensional spring-block model, we investigate how graded material properties affect the macroscopic frictional behaviour, in particular, static friction values and the transition from static to dynamic friction. The results suggest that the graded material properties can be exploited to reduce static friction with respect to the corresponding non-graded material and to tune it to desired values, opening possibilities for the design of bio-inspired surfaces with tailor-made tribological properties.
format Online
Article
Text
id pubmed-6142729
institution National Center for Biotechnology Information
language English
publishDate 2018
publisher Beilstein-Institut
record_format MEDLINE/PubMed
spelling pubmed-61427292018-09-25 Evidence of friction reduction in laterally graded materials Guarino, Roberto Costagliola, Gianluca Bosia, Federico Pugno, Nicola Maria Beilstein J Nanotechnol Full Research Paper In many biological structures, optimized mechanical properties are obtained through complex structural organization involving multiple constituents, functional grading and hierarchical organization. In the case of biological surfaces, the possibility to modify the frictional and adhesive behaviour can also be achieved by exploiting a grading of the material properties. In this paper, we investigate this possibility by considering the frictional sliding of elastic surfaces in the presence of a spatial variation of the Young’s modulus and the local friction coefficients. Using finite-element simulations and a two-dimensional spring-block model, we investigate how graded material properties affect the macroscopic frictional behaviour, in particular, static friction values and the transition from static to dynamic friction. The results suggest that the graded material properties can be exploited to reduce static friction with respect to the corresponding non-graded material and to tune it to desired values, opening possibilities for the design of bio-inspired surfaces with tailor-made tribological properties. Beilstein-Institut 2018-09-13 /pmc/articles/PMC6142729/ /pubmed/30254839 http://dx.doi.org/10.3762/bjnano.9.229 Text en Copyright © 2018, Guarino et al. https://creativecommons.org/licenses/by/4.0https://www.beilstein-journals.org/bjnano/termsThis is an Open Access article under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0). Please note that the reuse, redistribution and reproduction in particular requires that the authors and source are credited. The license is subject to the Beilstein Journal of Nanotechnology terms and conditions: (https://www.beilstein-journals.org/bjnano/terms)
spellingShingle Full Research Paper
Guarino, Roberto
Costagliola, Gianluca
Bosia, Federico
Pugno, Nicola Maria
Evidence of friction reduction in laterally graded materials
title Evidence of friction reduction in laterally graded materials
title_full Evidence of friction reduction in laterally graded materials
title_fullStr Evidence of friction reduction in laterally graded materials
title_full_unstemmed Evidence of friction reduction in laterally graded materials
title_short Evidence of friction reduction in laterally graded materials
title_sort evidence of friction reduction in laterally graded materials
topic Full Research Paper
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6142729/
https://www.ncbi.nlm.nih.gov/pubmed/30254839
http://dx.doi.org/10.3762/bjnano.9.229
work_keys_str_mv AT guarinoroberto evidenceoffrictionreductioninlaterallygradedmaterials
AT costagliolagianluca evidenceoffrictionreductioninlaterallygradedmaterials
AT bosiafederico evidenceoffrictionreductioninlaterallygradedmaterials
AT pugnonicolamaria evidenceoffrictionreductioninlaterallygradedmaterials