Imagine the intersection: All pedestrians are waiting for red, but if you take a step alone – follow the rest. It turns out that there is something similar at the microscopic level. Scientists from Amsterdam learned that when two surfaces began to slip, the process was initiated with a similar “crowded effect .. Published in İş Magazine Physical Review Letters (PRL).
In the experiment, the researchers pressed the smooth surface of the silicone into the container and examined how the friction force changed with an increase in pressure between them.
A microscopic inequality – Asperit was responsible for a weak pressure for rock resistance. It must be pressed strongly in a way that takes action. However, with more pressure, too many asperites are in contact at the same time, and when some begin to shift, the rest will quickly “infected this movement like a crowd in the transition.
Conclusion: Slip starts more easily and static friction coefficient … decreases! The more you press the surfaces, the more it is more difficult to move them. The authors confirmed their results using mathematical modeling.
This discovery is both important in nanotechnology – for example, while assembling micro circuits with high accuracy – in geophysics: The beginning of the shift in the major faults of the world is based on earthquakes. New information will help to model and predict such phenomena more accurately.
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Source: Gazeta
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