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Abstract: In order to know the dynamic behavior and its change regularity of wear process, the running-in attractor is studied with fractal and chaos theories. Wear tests are conducted and the time series signals of frictional coefficient are collected on an MMW-1 mode friction and wear tester. The forming and disappearing process of the running-in attractor is investigated by the technique of phase-space reconstruction by time-delay. The fractal dimension of the running-in attractor is calculated and its change law is studied with correlation-dimension method. It is found that the running-in process is the forming process of the running-in attractor, the running-in attractor has a high and stable fractal dimension and a "forming-keeping-disappearing" evolvement rule in wear process. The evolvement rule of the running-in attractor is very useful to the identification of running-in state and the prediction of wear progress.
Key words: Running-in Fractal Chaos Phase-space Attractor
CLC No:
TH117.2
国家自然科学基金(50475164)、国家重点基础研究发展计划(973计划,
2007CB607605)和江苏省自然科学基金(BK2002116)资助项目.
Received
20070912,
received
in
revised
form
20080103
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