How can the effect of particle surface roughness on the contact area be predicted?

Nadimi S, Angelidakis V, Otsubo M, Ghanbarzadeh A (2022)


Publication Language: English

Publication Status: Published

Publication Type: Journal article

Publication year: 2022

Journal

Publisher: ELSEVIER SCI LTD

Book Volume: 150

Article Number: ARTN 104890

DOI: 10.1016/j.compgeo.2022.104890

Open Access Link: https://www.sciencedirect.com/science/article/pii/S0266352X22002336

Abstract

This paper describes a systematic study of the effect of fractal rough surfaces on the contact area with the aim of advancing contact constitutive laws used in the Discrete Element Method. An in-house Boundary Element code is adopted to investigate the mechanical behaviour of computer-generated surface roughness. Surfaces are generated to have methodically controlled root mean square height (S-q), root mean square gradient (S-dq), short wavevector (q0), large wavevector (q(1)), Hurst exponent (H) and fractal dimension (D-f). The effect of each parameter on the contact area is investigated. Two recently proposed analytical solutions in tribology (i.e. Persson-Tosatti and Pastewka-Robbins) are applied to predict the real contact area. A parameter based on S-q, q(0), and H is proposed and its sensitivity for real contact area prediction is demonstrated. Surfaces of natural sand are simulated and their mechanical response shows similar trend as the computer-generated surfaces, albeit more complex.

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How to cite

APA:

Nadimi, S., Angelidakis, V., Otsubo, M., & Ghanbarzadeh, A. (2022). How can the effect of particle surface roughness on the contact area be predicted? Computers and Geotechnics, 150. https://doi.org/10.1016/j.compgeo.2022.104890

MLA:

Nadimi, Sadegh, et al. "How can the effect of particle surface roughness on the contact area be predicted?" Computers and Geotechnics 150 (2022).

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