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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...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Beilstein-Institut
2018
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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 |
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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 |
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