基于Ti/TiN薄膜传感器的飞机金属结构裂纹监测

doi:10.7527/S1000-6893.2013.0404

Abstract

Abstract:

According to the real-time crack monitoring demand of aircraft metallic structures during their service, a structure crack monitoring method is presented based on the Ti/TiN conductive film and the electrical potential monitoring principle. First, a Ti/TiN film sensor is deposited on a hot spot of a structural surface by vacuum ion plating. Then, the damage consistency of the sensor film with the 2A12-T4 aluminum alloy substrate is verified by a fatigue test with excellent damage consistency. Finally, two groups of crack monitoring tests are carried out with Ti/TiN film sensors. The relationships between the electrical potential values of the sensors and the structural cracks are studied, and the two groups of monitoring results are compared, which shows that monitoring the structural crack origination and propagation of 2A12-T4 aluminum alloy in real-time can be achieved through analyzing the changes of the electrical potential values of the Ti/TiN film sensors, and the repeatability of the monitoring tests results is satisfactory.

Key words: structure health monitoring, film sensor, fatigue damage, vacuum ion plating, aluminum alloy 2A12-T4

CLC Number:

HOU Bo, HE Yuting, CUI Ronghong, ZHANG Teng, GAO Chao. Crack Monitoring of Aircraft Metallic Structures Based on Ti/TiN Film Sensors[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2014, 35(3): 878-884.

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Crack Monitoring of Aircraft Metallic Structures Based on Ti/TiN Film Sensors

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