Estimation and Warning of Fatigue Damage of FRP Stay Cables Based on Acoustic Emission Techniques and Fractal Theory
作者： H. Li , Y. Huang , W. L. Chen , M. L. Ma , D. W. Tao
DOI: 10.1111/J.1467-8667.2010.00713.X
关键词: Fibre-reinforced plastic 、 Arc length 、 Materials science 、 Time domain 、 Fractal 、 Fractal dimension 、 Frequency response 、 Signal 、 Structural engineering 、 Acoustic emission
摘要: A damage assessment and warning method for stay cables based on the acoustic emission (AE) technique fractal theory was developed. First, AE signal features of Higuchi's dimension (FD) were analyzed at various scales. The analytical results indicated that FD associated with frequency response. Meanwhile, it found curve length original reflected fluctuation in time domain. Both related to evolution. Based above analysis, a index, namely, FD-based defined by signals generated damaged structures, including its FD. Fatigue tests glass fiber-reinforced polymer (GFRP) carbon (CFRP) sensors performed validate proposed approach. time-history responses corresponding modes during entire cyclic loading process. indices all FRP obtained through analysis signals. relationships both index investigated. increased little number cycles early stage but dramatically final fatigue test. this article demonstrate an can quantify evolutionary process cables.
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