Numerical simulation of elastic bilayered contact. Part I _ Contact parameters

6th ModTech International Conference - Modern Technologies in Industrial Engineering

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

Department of Mechanics and Technologies, Stefan Cel Mare University of Suceava, 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 theorems;    Efficient numerical method;    Frequency response functions;    Influence coefficient;    Layered elastic solids;    Numerical predictions;    Rough surface contacts;    Tribological applications;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/400/4/042054/pdf
DOI  :  10.1088/1757-899X/400/4/042054

来源: IOP

【 摘 要 】

Protective coatings are increasingly utilized to provide low friction, high wear resistance and long fatigue life to many tribological applications including cutting tools, magnetic data storage or engine components. The coating design relies heavily on the knowledge of contact stresses generated in rough-surface contacts, thus requiring improved contact models and efficient numerical methods. Spectral analysis, based on the fast Fourier transform (FFT) and on the convolution theorem, has played an important role in assessing the elastic response of a homogenous half-space, as the corresponding Green's functions are readily available in the time/space domain. In the case of a bilayered medium, the elastic response is only known in the frequency domain as the frequency response functions, and derivation of the Green's functions can be challenging. This paper explores the possibility of using spectral methods in the analysis of contact behaviour of layered elastic solids. The starting point is the Discrete Convolution Fast Fourier Transform (DCFFT) technique, which eliminates the periodicity error associated with application of FFT to non-periodic problems. The influence coefficients required by DCFFT are derived from the frequency response functions. The numerical predictions agree well with results from the literature of layered elastic solids under normal contact load.