Electroadhesive sphere-flat contact problem: A comparison between DMT and full iterative finite element solutions

Publikationstyp
Journal Article
Date Issued
2020-12
Sprache
English
Author(s)
Papangelo, Antonio 
Lovino, Roberto  
Ciavarella, Michele  
Institut
Produktentwicklung und Konstruktionstechnik M-17  
TORE-URI
http://hdl.handle.net/11420/7068
Journal
Tribology international  
Volume
152
Article Number
106542
Citation
Tribology International (152): 106542 (2020-12)
Publisher DOI
10.1016/j.triboint.2020.106542
Scopus ID
2-s2.0-85089285606
The electroadhesive contact between a conductive sphere with a rigid substrate, both coated with an electrically insulating layer is studied, by adopting two solution strategies: (i) a DMT approximation and (ii) an iterative finite element model which accounts for the effect of the electroadhesive tractions on the deformation of the elastic solids. The contact problem is solved by varying the applied voltage and the elastic modulus of the coating layer. The two approaches (i) and (ii) give comparable results only in the limit of very low applied voltage, while they differ quantitatively and qualitatively at high voltage, as the DMT approach largely fails in predicting the repulsive contact force, which leads to greatly overestimate the macroscopic adhesive force.
Subjects
DMT
electroadhesion
Finite element
Soft contact