Modeling of Sliding of a Smooth Indenter over a Viscoelastic Layer Coupled with a Rigid Base

A new model for studying the kinetics of fatigue wear of a viscoelastic coating bonded to a rigid substrate is proposed. The fatigue mechanism is due to the cyclic interaction of the coating with a rough counterbody, which is modeled by a periodic system of smooth indenters. The study includes the solution of the problem of sliding contact of the indenter at a constant velocity along the viscoelastic coating, the calculation of stresses taking into account the mutual effect, and study of the process of damage accumulation in the material. The calculation of the damage function of the surface layer was carried out using the reduced stress criterion. Assuming the possibility of summation of accumulated damage, two processes were considered: delamination of surface layers of the coating and continuous fracture of the surface by the fatigue mechanism. The effect of the sliding velocity and viscoelastic properties of the material on the damage accumulation and the coating wear rate was analyzed. Two types of load, constant and stochastically varying, were used in modeling and analysis. It was found that the rate of fatigue wear of the coating increased and then became constant.

show abstract

“…The method of the contact problem solution was based on double integral Fourier transforms and an iterative procedure [ 43 ].…”

Section: Problem Formulation (Contact Problem and Internal Stresses)mentioning

confidence: 99%

Modeling of Fatigue Wear of Viscoelastic Coatings

Stepanov

Torskaya

2021

Materials

View full text Add to dashboard Cite

show abstract

“…Viscoelastic contact problems have drawn a great deal of attention (Goryacheva and Sadeghi, 1995;Chen et al, 2011;Putignano et al, 2015;Stepanov and Torskaya, 2018). It is also convenient to solve certain viscoelastic contact problems in the frequency domain.…”

Section: Ic Conversion From Frfsmentioning

confidence: 99%

FFT-Based Methods for Computational Contact Mechanics

et al. 2020

View full text Add to dashboard Cite

Computational contact mechanics seeks for numerical solutions to contact area, pressure, deformation, and stresses, as well as flash temperature, in response to the interaction of two bodies. The materials of the bodies may be homogeneous or inhomogeneous, isotropic or anisotropic, layered or functionally graded, elastic, elastoplastic, or viscoelastic, and the physical interactions may be subjected to a single field or multiple fields. The contact geometry can be cylindrical, point (circular or elliptical), or nominally flat-to-flat. With reasonable simplifications, the mathematical nature of the relationship between a surface excitation and a body response for an elastic contact problem is either in the form of a convolution or correlation, making it possible to formulate and solve the contact problem by means of an efficient Fourier-transform algorithm. Green's function inside such a convolution or correlation form is the fundamental solution to an elementary problem, and if explicitly available, it can be integrated over a region, or an element, to obtain influence coefficients (ICs). Either the problem itself or Green's functions/ICs can be transformed into a space-related frequency domain, via a Fourier transform algorithm, to formulate a frequency-domain solution for contact problems. This approach converts the original tedious integration operation into multiplication accompanied by Fourier and inverse Fourier transforms, and thus a great computational efficiency is achieved. The conversion between ICs and frequency-response functions facilitate the solutions to problems with no explicit space-domain Green's function. This paper summarizes different algorithms involving the fast Fourier transform (FFT), developed for different contact problems, error control, as well as solutions to the problems involving different contact geometries, different types of materials, and different physical issues. The related works suggest that (i) a proper FFT algorithm should be used for each of the cylindrical, point, and nominally flat-flat contact problems, and then (ii) the FFT-based algorithms are accurate and efficient. In most cases, the ICs from the 0order shape function can be applied to achieve satisfactory accuracy and efficiency if (i) is guaranteed.

show abstract

“…Regarding viscoelastic layer modeling, much work has been done in the eld of contact mechanics, such as problems of a viscoelastic layer on a rigid substrate [1,5,6,37,97,101,113,127], on an elastic [12, 14, 35, 45-47, 61, 78, 158] or on a viscoelastic half-space [145,146], even though the aim of these studies was not to model EHL. Here, some work on the modeling of viscoelastic layered elastic half-space in rolling contacts is introduced.…”

Section: Introductionmentioning

confidence: 99%

Solid viscoelasticity in contact mechanics and elastohydrodynamic lubrication

Yan

View full text Add to dashboard Cite

Modeling of Sliding of a Smooth Indenter over a Viscoelastic Layer Coupled with a Rigid Base

Cited by 15 publications

References 2 publications

Modeling of Fatigue Wear of Viscoelastic Coatings

Modeling of Fatigue Wear of Viscoelastic Coatings

FFT-Based Methods for Computational Contact Mechanics

Solid viscoelasticity in contact mechanics and elastohydrodynamic lubrication

Contact Info

Product

Resources

About