Frictional Adhesive Contact of Multiferroic Coatings Based on the Hybrid Element Method

TL;DR

This paper investigates the complex interactions of friction, adhesion, and multiferroic properties in coatings using advanced numerical methods, revealing how coating thickness and friction influence contact behavior and field distributions.

Contribution

It introduces a hybrid element method framework to analyze frictional adhesive contact in multiferroic coatings, incorporating electric and magnetic effects into contact mechanics.

Findings

Coating thickness influences contact stiffness and field distributions.

Friction and adhesion alter the symmetry of electric and magnetic fields.

Increased friction shifts pressure and potential distributions towards the leading edge.

Abstract

We study the frictional adhesive contact of a rigid insulating sphere sliding past a multiferroic coating deposed onto a rigid substrate, based on the hybrid element method (HEM). The adhesion behavior is described based on the Maugis-Dugdale (MD) model. The adhesion-driven conjugate gradient method (AD-CGM) is employed to calculate the distribution of unknown pressures, while the discrete convolution-fast Fourier transform (DC-FFT) is utilized to compute the deformations, surface electric and magnetic potentials as well as the subsurface stresses, electric displacements, and magnetic inductions. We found that the coating thickness affect the contact stiffness and the interplay between friction and adhesion. More importantly, friction and gap-dependent MD adhesion affects elastic, electric, and magnetic behavior of the interface, breaking the symmetry between leading and trailing edges behaviors in all the investigated fields. Indeed, increasing the friction coefficient, the contact shape is no longer circular, the pressure distribution shifts towards the leading edge, the electric/magnetic surface potentials distributions sharpen at the leading edge, and the subsurface stress fields concentrates at the trailing edges.