Abstract
Running-in wear experiments were conducted on a pin-on-disk tester. The attractors of friction vibration were investigated by applying the chaos theory, and the evolvement mechanism of the friction vibration chaotic attractors in the running-in process was analyzed. The experimental results indicate that the friction vibration has a chaotic nature, and the chaotic attractor in the phase space is an always open trajectory with a specific hierarchy and structure. The chaotic attractor of the friction vibration gradually converges and tends toward a balanced state in the running-in process. The evolvement of the friction vibration chaotic attractors indicated that the wear state changes from the running-in stage to the stable wear stage.
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