1. Evaluation of PTCa/PEKK Composites for Acoustic Emission Detection.
- Author
-
Martin-France, P., Martin, T., Fernandez-Perez, O., Tunnicliffe, D. L., and Das-Gupta, D. K.
- Subjects
ACOUSTIC emission ,PIEZOELECTRICITY ,COMPOSITE materials ,CARBON fibers ,TRANSDUCERS ,CERAMIC materials ,COMPOSITE construction - Abstract
The electromechanical properties of calcium modified lead titanate/poly (ether ketone ketone) (PTCa/PEKK) composites and their ability after poling to detect acoustic emission (AE) when mounted on carbon fiber reinforced composite (CFRC) panels is reported. They have been characterized by measurements of conductance, G, permittivity, ∊′, pyroelectric, p, and piezoelectric, d
33 , coefficients for different ceramic volume fractions. In addition, the electromechanical coupling co-efficient, k33 , the elastic compliance coefficient, s33 , the acoustic impedance, Za , and the quality factor coefficient, Qm have been calculated from the measurement of the complex impedance (Z) of the composite samples acting as free resonating transducers. It is demonstrated that in a square array they can be used to locate AE sources with good accuracy and that they will also detect AE caused by the delamination of a CFRC beam. [ABSTRACT FROM AUTHOR]- Published
- 2004