EFFECTS OF LIQUID LOADING AND CHANGE OF PROPERTIES OF ADHESIVE JOINTS ON SUBTRACTION TECHNIQUES FOR STRUCTURAL HEALTH MONITORING
Tindaro Cicero, P. Cawley, M. J. S. Lowe, F. Simonetti, Donald O. Thompson, Dale E. Chimenti · AIP conference proceedings · 2009
Ultrasonic guided waves offer the possibility of inspecting large areas from a small number of sensor positions. However, inspection of complex structures is difficult as the reflections from different features overlap. Subtraction techniques appear to be a promising approach for Structural Health Monitoring (SHM) since they can identify changes in the measured signal by comparison of the recorded time trace with the available baselines for the undamaged structure. In this work, our aim is to establish whether temperature compensation techniques are also able to cope with the changes caused by liquid loading or the effects of non uniform temperature responses of materials in adhesive bonds.