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- W4386078515 abstract "A bearing is a system of spheres (or disks) in contact. If in a bearing every loop is even, one can obtain “bearing states”, in which touching spheres roll on each other without slip. We frustrate a system of touching spheres by imposing two different bearing states on opposite sides and search for the configurations of lowest energy dissipation. For Coulomb friction (with random friction coefficients) in two dimensions, a sharp line separates the two bearing states and we prove that this line corresponds to the minimum cut. Astonishingly however, in three dimensions, intermediate bearing domains, that are not synchronized with either side, are energetically more favourable than the minimum-cut surface. This novel state of minimum dissipation is characterized by a spanning network of slip-less contacts that reaches every sphere. Such a situation becomes possible because in three dimensions bearings of loops of size four have four degrees of freedom. By considering spheres of different size, packings with bearing states can even be made space-filling. The construction and mechanical properties of such space-filling bearings will be discussed. Space-filling bearing states can be viewed as a realization of solid turbulence exhibiting Kolmogorov scaling and anomalous heat conduction. Bearings states can be perceived as physical realizations of networks of oscillators with asymmetrically weighted couplings. These networks can exhibit optimal synchronization properties through tuning of the local interaction strength as a function of node degree or the inertia of their constituting rotor disks through a power-law mass-radius relation. As a consequence, one finds that space filling bearings synchronize fastest, when they are hollow." @default.
- W4386078515 created "2023-08-23" @default.
- W4386078515 creator A5065071611 @default.
- W4386078515 date "2021-09-13" @default.
- W4386078515 modified "2023-09-25" @default.
- W4386078515 title "Frustrated Bearings" @default.
- W4386078515 cites W3081719521 @default.
- W4386078515 doi "https://doi.org/10.52843/cassyni.j9y3p1" @default.
- W4386078515 hasPublicationYear "2021" @default.
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