Hierarchical structures are very common in Nature, but only recently they have been systematically studied in materials physics, in order to understand the specific effects they can have on the mechanical properties of various systems. Structural hierarchy provides a way to tune and optimize macroscopic mechanical properties starting from simple base constituents, and new materials are nowadays designed exploiting this possibility. This can be also true in the field of tribology. In this paper, we study the effect of hierarchical patterned surfaces on the static and dynamic friction coefficients of an elastic material. Our results are obtained by means of numerical simulations using a 1-D spring-block model, which has previously been used to investigate various aspects of friction. Despite the simplicity of the model, we highlight some possible mechanisms that explain how hierarchical structures can significantly modify the friction coefficients of a material, providing a means to achieve tunability.

Static and dynamic friction of hierarchical surfaces

COSTAGLIOLA, GIANLUCA;BOSIA, Federico;
2016-01-01

Abstract

Hierarchical structures are very common in Nature, but only recently they have been systematically studied in materials physics, in order to understand the specific effects they can have on the mechanical properties of various systems. Structural hierarchy provides a way to tune and optimize macroscopic mechanical properties starting from simple base constituents, and new materials are nowadays designed exploiting this possibility. This can be also true in the field of tribology. In this paper, we study the effect of hierarchical patterned surfaces on the static and dynamic friction coefficients of an elastic material. Our results are obtained by means of numerical simulations using a 1-D spring-block model, which has previously been used to investigate various aspects of friction. Despite the simplicity of the model, we highlight some possible mechanisms that explain how hierarchical structures can significantly modify the friction coefficients of a material, providing a means to achieve tunability.
2016
94
6
063003-1
063003-10
http://harvest.aps.org/bagit/articles/10.1103/PhysRevE.94.063003/apsxml
https://arxiv.org/abs/1609.08846
Statistical and Nonlinear Physics; Statistics and Probability; Condensed Matter Physics
Costagliola, Gianluca; Bosia, Federico; Pugno, Nicola M.
File in questo prodotto:
File Dimensione Formato  
2016_Costagliola_PRE.pdf

Accesso aperto

Tipo di file: PDF EDITORIALE
Dimensione 2.22 MB
Formato Adobe PDF
2.22 MB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/1621306
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 35
  • ???jsp.display-item.citation.isi??? 34
social impact