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

Computers and Geotechnics Elsevier

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.

Authors with CRIS profile

Vasileios Angelidakis Lehrstuhl für Multiscale Simulation of Particulate Systems (MSS)

Involved external institutions

Newcastle University GB United Kingdom (GB) University of Leeds GB United Kingdom (GB) University of Tokyo JP Japan (JP)

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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