Title :
Design criteria and manufacturing technology of piezo-polymer transducer arrays for acoustic guided waves detection
Author :
Capineri, Lorenzo ; Masotti, L.
Author_Institution :
Ultrasound and Non Destructive Testing Laboratory
Abstract :
Composite laminates are widely used in space industry and are generally tested for failures with acoustic guided waves. This work shows that piezo-polymer material such as PVDF offer a possibility to design comb or interdigital transducers (IDT) in a versatile way by the electrodes pattern definition with a laser ablation process of metallized films. A transducer arrays design process is described and manufacturing of prototypes is illustrated. Predicted responses of the selected modes of propagation by computer simulations are in good agreement with the theoretical ones. Finally the characteristics of IDT transducers working at central frequency of about 0.5 MHz on FR-4 glass-epoxy, 0°-90° composite laminates, are reported.
Keywords :
failure analysis; interdigital transducers; laminates; laser ablation; piezoelectric materials; polymers; ultrasonic materials testing; ultrasonic transducers; 0.5 MHz; acoustic guided waves detection; comb transducers; composite laminates; design criteria; electrodes pattern definition; failures; interdigital transducers; laser ablation process; manufacturing technology; metallized films; piezo-polymer transducer arrays; space industry; Acoustic arrays; Acoustic signal detection; Acoustic testing; Acoustic transducers; Acoustic waves; Aerospace industry; Inorganic materials; Laminates; Manufacturing industries; Space technology;
Conference_Titel :
Ultrasonics Symposium, 2002. Proceedings. 2002 IEEE
Print_ISBN :
0-7803-7582-3
DOI :
10.1109/ULTSYM.2002.1193532
