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Inastantaneous baseline multiple damage detection and localization in an aluminum plate using Lamb waves

Alem, B ; Sharif University of Technology

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  1. Type of Document: Article
  2. Publisher: International Council of the Aeronautical Sciences
  3. Abstract:
  4. In recent years, new Structural Health Monitoring (SHM) methodologies with a concept of "instantaneous baseline damage detection" are being developed by many researchers. In this context, this paper uses a new method to identify multiple damage in the aluminum plate. For this goal use from spars PZWS sensor network to generate and received guided waves. Ultrasonic waves are generated and measured from all possible different pairs of excitation and sensing transducers. For feature extraction of received signals used from continues wavelet transform. A probabilistic damage diagnostic algorithm based on correlation analysis was investigated to locate single or multiple damages. In this study, the method is validated using commercial finite element software to model the presence of 10 ultrasonic transducers bonded onto an aluminum plate
  5. Keywords:
  6. Baseline-free damage detection ; Guided waves ; Piezoelectric sensor ; Aluminum ; Aluminum plating ; Feature extraction ; Finite element method ; Guided electromagnetic wave propagation ; Plates (structural components) ; Sensor networks ; Surface waves ; Transducers ; Ultrasonic applications ; Ultrasonic transducers ; Ultrasonic waves ; Wavelet transforms ; Correlation analysis ; Detection and localization ; Finite element software ; Probabilistic damage ; Received signals ; Sensing transducer ; Structural health monitoring (SHM) ; Damage detection
  7. Source: 30th Congress of the International Council of the Aeronautical Sciences, 25 September 2016 through 30 September 2016 ; 2016 ; 9783932182853 (ISBN)