T. Liu et al., Analysis of acousto-ultrasonic characteristics for contact-type transducers coupled to composite laminated plates, INT J MECH, 43(6), 2001, pp. 1441-1456
The acousto-ultrasonic (AU) input-output characteristics for contact-type t
ransmitting and receiving transducers coupled to composite laminated plates
are considered in this paper. Combining a multiple integral transform meth
od, an ordinary discrete layer theory for the laminates and some simplifyin
g assumptions for the electro-mechanical transduction behaviour of the tran
sducers, an analytical solution is developed which can deal with all the wa
ve processes involved in the AU measurement system, i.e, wave generation, w
ave propagation and wave reception. The spectral response of the normal con
tact pressure sensed by the receiving transducer due to an arbitrary input
pulse excited by the transmitting transducer is obtained. To validate the n
ew analytical-numerical spectral technique in the low-frequency regime, the
results are compared with Mindlin plate theory solutions. Based on the ana
lytical results, numerical calculations are carried out to investigate the
influence of various external parameters such as frequency content of the i
nput pulse, transmitter/receiver spacing and transducer aperture on the out
put of the measurement system. The results show that the presented analytic
al-numerical procedure is an effective tool for understanding the input-out
put characteristics of the AU technique for laminated plates. (C) 2001 Else
vier Science Ltd. All rights reserved.