The frictional contact of coated bodies. Part II _ The slip-stick contact

7th Modern Technologies in Industrial Engineering

工业技术（总论）

Spinu, S.^1^2 ; Cerlinca, D.^1^2 ; Musca, I.^1^2

Stefan Cel Mare University of Suceava, Department of Mechanics and Technologies, 13th University Street, 720229, Romania^1

Integrated Center for Research Development and Innovation in Advanced Materials, Nanotechnologies, and Distributed Systems for Fabrication and Control (MANSiD), Stefan Cel Mare University, Suceava, Romania^2

关键词: Convolution products;    Displacement and stress;    Elastic contact problems;    Elastic displacements;    Frequency response functions;    Frictional contact;    Numerical solution;    Tangential directions;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/591/1/012070/pdf
DOI  :  10.1088/1757-899X/591/1/012070

学科分类：工业工程学

来源: IOP

【 摘 要 】

Fretting is a special wear mode that occurs in a contact subjected to minute relative motion by vibration or other perturbations. The solution of the slip-stick elastic contact is required to address the problem of tractions and stresses arising in a fretting contact. This solution may be particularly difficult to obtain for coated bodies, considering that, unlike the case of homogenous materials, the response of layered materials to unit load has not yet been expressed in closed form. However, explicit expressions, also known as the frequency response functions, have been derived in the Fourier transform domain. Considering that displacement and stress calculation in an elastic contact process yields convolution products arising from superposition of effects, the existing frequency response functions can be used to calculate the response of layered materials directly in the spectral domain, and subsequently transferred to the space domain. Once a method for elastic displacement calculation in layered materials is made available, the slip-stick elastic contact problem can be solved in the same manner as for homogenous materials. The contact problems in the normal and in the tangential direction are coupled, as opposed to the sliding contact model. The numerical solution allows for identification of the slip and stick regions, and of the corresponding contact tractions. The latter tractions can be subsequently used to assess the stress state in the coated body, and thus to formulate competent design decisions.