Acoustic emission detection of fatigue damage of aircraft riveted panel
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摘要: 利用声发射技术对飞机铆接壁板疲劳状态进行了检测试验。采用声发射参数滤波和空间滤波的方法在强噪声环境下获取有效声发射信号，通过对采集的主要声发射信号特征参数进行趋势分析，空间定位分析和组合滤波分析，获得了疲劳裂纹萌生的时间及其扩展的情况。结果表明，声发射技术能够准确预测壁板结构疲劳裂纹的萌生和扩展，为飞机壁板结构的疲劳和损伤容限设计提供了参考。Abstract: Using Acoustic Emission (AE )to monitor riveted Panel Fatigue test of Aircraft. Parameter filter and location filter were utilized to obtain the available AE signals. Trend analysis, location analysis and combined filter analysis of the characteristic parameters of available AE signals were further used to obtain the data of fatigue crack initiation and extension. These results have proven that the technique of AE can exactly predict the time of fatigue crack initiation and extension, and it can provide reference to fatigue and damage tolerable design of panel structures of aircraft.
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Keywords:
- riveted panel /
- acoustic emission /
- fatigue crack
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