수치적 방법을 이용한 3차원 거친 표면의 마모 해석
Numerical Wear Analysis of a Three-dimensional Rough Surface
0
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
It is essential to predict the amount of wear and surface parameters for a surface where relative motion occurs. In the asperity-based model for wear prediction, only the average contact pressure can be obtained. Hence, the accuracy of wear analysis is poor. In this study, DC-FFT is used to obtain the pressure of each node, and wear analysis is performed by considering the effect of the pressure gradient. The numerical surface generation method is used to create Gaussian, negatively skewed, and positively skewed surfaces for wear analysis. The spatial and height distributions of each surface are analyzed to confirm the effectiveness of the generated surface. Furthermore, wear analysis is performed using DC-FFT and Archard's wear formula. After analysis, it is confirmed that all peaks are removed and only valleys remain on the surface. The RMS roughness and Sk continue to decrease and Ku increases as the cycle progresses. It is observed that the surface parameters are significantly affected by the radius of curvature of the asperity. This analysis method is more accurate than the existing average wear and truncation models because the change in asperity shape during the wear process is reflected in detail.
Abstract
It is essential to predict the amount of wear and surface parameters for a surface where relative motion occurs. In the asperity-based model for wear prediction, only the average contact pressure can be obtained. Hence, the accuracy of wear analysis is poor. In this study, DC-FFT is used to obtain the pressure of each node, and wear analysis is performed by considering the effect of the pressure gradient. The numerical surface generation method is used to create Gaussian, negatively skewed, and positively skewed surfaces for wear analysis. The spatial and height distributions of each surface are analyzed to confirm the effectiveness of the generated surface. Furthermore, wear analysis is performed using DC-FFT and Archard's wear formula. After analysis, it is confirmed that all peaks are removed and only valleys remain on the surface. The RMS roughness and Sk continue to decrease and Ku increases as the cycle progresses. It is observed that the surface parameters are significantly affected by the radius of curvature of the asperity. This analysis method is more accurate than the existing average wear and truncation models because the change in asperity shape during the wear process is reflected in detail.
참고문헌 (24)
- S. Hutt, "Generation of Acoustic Emission from the running-in and subsequent micropitting of a mixed-elastohydrodynamic contact", Tribology International, 119, pp.270~280 (2018), Elsevier BV[DOI]
- A. Clarke, "Running-in and micropitting behaviour of steel surfaces under mixed lubrication conditions", Tribology International, 101, pp.59~68 (2016), Elsevier BV[DOI]
- T. A. Spedding, "The Pearson System of Distributions: Its Application to Non-Gaussian Surface Metrology and a Simple Wear Model", Journal of Lubrication Technology, 102(4), pp.495~500 (1980), ASME International[DOI]
- Arnab Ghosh, "A novel approach to model effects of surface roughness parameters on wear", Wear, 338-339, pp.73~94 (2015), Elsevier BV[DOI]
- P. Ranganath Nayak, "Random Process Model of Rough Surfaces", Journal of Lubrication Technology, 93(3), pp.398~407 (1971), ASME International[DOI]
- Prajapati, D. K., "3D Numerical wear Model for Determining the Change in Surface Topography", Surf Topogr Metrol Prop, 6(4), pp.045006~ (2018)[DOI]
- Whitehouse, D. J., "The properties of random surfaces of significance in their contact", Proceedings of the Royal Society of London. A. Mathematical and Physical Sciences, 316(1524), pp.97~121 (1970), The Royal Society[DOI]
- Nadir Patir, "A numerical procedure for random generation of rough surfaces", Wear, 47(2), pp.263~277 (1978), Elsevier BV[DOI]
- D.J. Whitehouse, "The Generation of Two Dimensional Random Surfaces Having a Specified Function", CIRP Annals, 32(1), pp.495~498 (1983), Elsevier BV[DOI]
- S.J. You, "Computer synthesis of three-dimensional surfaces", Wear, 145(1), pp.29~42 (1991), Elsevier BV[DOI]
- Y.Z. Hu, "Simulation of 3-D random rough surface by 2-D digital filter and fourier analysis", International Journal of Machine Tools and Manufacture, 32(1-2), pp.83~90 (1992), Elsevier BV[DOI]
- Borri, C., "Topological Characterization of Antireflective and Hydrophobic Rough Surfaces : are Random Process Theory and Fractal Modeling Applicable?", J. Phys D Appl Phys, 48(4), pp.1~21 (2015)[DOI]
- Jiunn-Jong Wu, "Simulation of non-Gaussian surfaces with FFT", Tribology International, 37(4), pp.339~346 (2004), Elsevier BV[DOI]
- Yuechang Wang, "A Simulation Method for Non-Gaussian Rough Surfaces Using Fast Fourier Transform and Translation Process Theory", Journal of Tribology, 140(2), pp.021403~ (2018), ASME International[DOI]
- I. D. Hill, "Algorithm AS 99: Fitting Johnson Curves by Moments", Applied Statistics, 25(2), pp.180~189 (1976), JSTOR[DOI]
- Arthur Francisco, "A hybrid method for fast and efficient rough surface generation", Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology, 230(7), pp.747~768 (2016), SAGE Publications[DOI]
- Greenwood, J. A., "Contact of nominally flat surfaces", Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 295(1442), pp.300~319 (1966), The Royal Society[DOI]
- Shuangbiao Liu, "A Fast and Effective Method for Transient Thermoelastic Displacement Analyses", Journal of Tribology, 123(3), pp.479~485 (2001), ASME International[DOI]
- A. A. Lubrecht, "A Fast Solution of the Dry Contact Problem and the Associated Sub-Surface Stress Field, Using Multilevel Techniques", Journal of Tribology, 113(1), pp.128~133 (1991), ASME International[DOI]
- Y. Ju, "Spectral Analysis of Two-Dimensional Contact Problems", Journal of Tribology, 118(2), pp.320~328 (1996), ASME International[DOI]
- Shuangbiao Liu, "A versatile method of discrete convolution and FFT (DC-FFT) for contact analyses", Wear, 243(1-2), pp.101~111 (2000), Elsevier BV[DOI]
- Vincent Boucly, "Modeling of the Rolling and Sliding Contact Between Two Asperities", Journal of Tribology, 129(2), pp.235~245 (2007), ASME International[DOI]
- J. F. Archard, "Contact and Rubbing of Flat Surfaces", Journal of Applied Physics, 24(8), pp.981~988 (1953), AIP Publishing[DOI]
- Vahid Mortazavi, "On the Prediction of Transient Wear", Journal of Tribology, 138(4), pp.041604~ (2016), ASME International[DOI]