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Proceedings Paper

Monitoring of fatigue crack under complex environment using guided waves
Author(s): Jianfei Tang; Gang Yan; Xiwu Xu
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Paper Abstract

This paper presents an experimental study on monitoring of fatigue crack under complex environment using guided waves. An experimental set-up consisting of an electrical oven, a MTS testing machine and a monitoring system is established to perform the study. First, the combined effects of temperature, load and vibration on the propagation of guided waves in metallic structure is studied. Then, a statistical approach is proposed to detect fatigue crack under these combined effects. Damage feature is extracted after the guided wave signals are processed by Fourier transform. A Monte Carlo procedure is employed to estimate the probability density functions of the feature before and after cracking, respectively. By comparing the probability density functions, the probability of existence of fatigue crack is determined. Experimental study on a fatigue coupon under combined effects of temperature, load and vibration is conducted to demonstrate the effectiveness of the proposed method.

Paper Details

Date Published: 12 April 2012
PDF: 8 pages
Proc. SPIE 8409, Third International Conference on Smart Materials and Nanotechnology in Engineering, 84092R (12 April 2012); doi: 10.1117/12.923212
Show Author Affiliations
Jianfei Tang, Nanjing Univ. of Aeronautics and Astronautics (China)
Gang Yan, Nanjing Univ. of Aeronautics and Astronautics (China)
Xiwu Xu, Nanjing Univ. of Aeronautics and Astronautics (China)


Published in SPIE Proceedings Vol. 8409:
Third International Conference on Smart Materials and Nanotechnology in Engineering
Jinsong Leng; Yoseph Bar-Cohen; In Lee; Jian Lu, Editor(s)

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