Stochastic properties of static friction
نویسندگان
چکیده
The onset of frictional motion is mediated by rupture-like slip fronts, which nucleate locally and propagate eventually along the entire interface causing global sliding. static friction coefficient a macroscopic measure applied force at this particular instant when loses stability. However, experimental studies are known to present important scatter in measurement friction; origin remains unexplained. Here, we study nucleation local interfaces with slip-weakening random strength analyze resulting variability measured strength. Using numerical simulations that solve elastodynamic equations, observe multiple patches simultaneously, many stable grow only slowly, but one reaches critical length starts propagating dynamically. We show theoretical criterion based on equilibrium solution predicts quantitatively well develop Monte-Carlo model adapting pre-computing modal convolution terms, enables us run efficiently large number samples distribution caused stochastic properties results demonstrate an increasing spatial correlation interface, representing geometric imperfections roughness, causes lower friction. Conversely, smaller increases while its decreases. further randomness insufficient for existence systematic precursory events. Random or non-uniformity driving force, such as potential energy stress drop, required arrested fronts. Our observations...
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ژورنال
عنوان ژورنال: Journal of The Mechanics and Physics of Solids
سال: 2021
ISSN: ['0022-5096', '1873-4782']
DOI: https://doi.org/10.1016/j.jmps.2020.104242