Evaluation of PTCa/PEKK composites for acoustic emission detection

Author

Marin-Franch, P. ; Martin, T. ; Fernandez-Perez, O. ; Tunnicliffe, D.L. ; Das-Gupta, D.K.

Author_Institution

Sch. of Inf., Univ. of Wales, Bangor, UK

Volume

11

Issue

1

fYear

2004

Firstpage

50

Lastpage

55

Abstract

The electromechanical properties of calcium modified lead titanate/poly(ether ke-tone 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, ε, pyroelectric, p, and piezoelectric, d₃₃, coefficients for different ceramic volume fractions. In addition, the electromechanical coupling coefficient, k_t, the elastic compliance coefficient, s₃₃, the acoustic impedance, Z_a, and the quality factor coefficient, Q_m 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.

Keywords

acoustic emission; calcium; carbon fibre reinforced composites; composite materials; lead compounds; piezoelectricity; polymers; PbTiO₃:Ca; acoustic emission detection; calcium modified lead titanate-poly(ether ke-tone ketone); carbon fiber reinforced composite panels; ceramic volume fractions; electromechanical coupling coefficient; electromechanical properties; piezoelectric; pyroelectric; resonating transducers; Acoustic emission; Acoustic measurements; Acoustic signal detection; Calcium; Carbon dioxide; Impedance; Permittivity measurement; Pyroelectricity; Titanium compounds; Volume measurement;

fLanguage

English

Journal_Title

Dielectrics and Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

1070-9878

Type

jour

DOI

10.1109/TDEI.2004.1266316

Filename

1266316