Volume 39 Issue 10
Oct.  2013
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Hou Bo, He Yuting, Cui Ronghong, et al. Fatigue crack monitoring of metallic structure based on coating sensor[J]. Journal of Beijing University of Aeronautics and Astronautics, 2013, 39(10): 1298-1302. (in Chinese)
Citation: Hou Bo, He Yuting, Cui Ronghong, et al. Fatigue crack monitoring of metallic structure based on coating sensor[J]. Journal of Beijing University of Aeronautics and Astronautics, 2013, 39(10): 1298-1302. (in Chinese)

Fatigue crack monitoring of metallic structure based on coating sensor

  • Received Date: 11 Dec 2012
  • Publish Date: 30 Oct 2013
  • To allow continuous crack monitoring of aircraft metallic structures during their service, a fatigue crack monitoring method was presented based on modern surface technology and electrical potential technique. A crack monitoring coating sensor, consisting of the insulated separating layer, the conductive sensing layer and the packaging protective layer, was deposited on the hot spots of the structure. Fatigue crack monitoring experiments were carried out. Experimental results show that the information about crack can be acquired through analyzing the changes of the resistance (electrical potential) values of the surface coating sensor and the crack on different spots of aluminum alloy joint structures can be monitored availably at the same time. Moreover, the fatigue property of the specimen with surface coating sensor and that of the original specimen were studied. Contrast experiment results show that there is no obvious influence on the fatigue property of the 2A12-T4 aluminum alloy to prepare the coating sensor on its surface by modern surface technology.

     

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