Application of ultrasonic transducers for investigation of composite materials

Abstract

In this article the developed low frequency contact type ultrasonic transducers and its application are presented. The special scanner carriage, the adjuster, the single holder and tandem holder were manufactured and used in the measurement carried out on the test sample of composite material. The mechanical system enables to support accurately the stable force pressing the transducer to the composite sample. The characteristics of the low frequency transducers in the time and frequency domains are presented. The composite materials such as CFRP and GFRP were investigated using the developed transducers and a contact technique. It was demonstrated that investigated approach enables to detect non-uniformities in composite materials.