On the dynamic behaviour of interfacial cracks between a piezoelectric layer and an elastic substrate

Abstract

Surface-bonded piezoelectric layers can be used as actuators/sensors for advanced structural applications. The current paper provides a theoretical study of the dynamic behaviour of interacting cracks between a piezoelectric layer and an elastic medium under antiplane mechanical loads. The electromechanical field of a single interfacial crack is determined first using Fourier transform technique and solving the resulting integral equations. This fundamental solution is then implemented into a pseudo-incident wave method to account for the interaction between different cracks. The dynamic behaviour of the resulting stress field is studied with special attention being paid to the stress intensity factors at the crack tips. Typical examples are provided to show the effect of the size and position of the cracks, the material combination and the loading frequency upon the stress intensity factors.

Fracture Mechanics of Piezoelectric and Ferroelectric Solids

“…Wang and Yu (1999), Shindo et al (2002) and Du et al (2002) investigated respectively the scattering of SH wave generated by arc interficial cracks between the infinite matrix and piezoelectric inclusion. Huang and Wang (2006) studied the problems similar to that had been analyzed by Gu et al (2002b), they assumed that there were multi cracks at the interface, and discussed mainly the influence on dynamic stress intensity factor imposed by the interaction between cracks. Love wave belongs to the guided wave, it is SH wave that propagates in a way parallel to the interface in a laminated half-space.…”

Enabling storage and utilization of low-carbon electricity: power to formic acid

“…Using the inherent surface activity of NCNT, Zhang et al deposited SnO2 on NCNT to form a composite, which has been further used to modify a GCE (SnO2-NCNT/GCE). 305 In comparison to the electrode without SnO2 (NCNT/GCE), both electrodes were capable of reducing CO2 electrochemically to formate in the CO2 saturated 0.1 M KHCO3 aqueous solution, but SnO2-NCNT/GCE has a much higher activity. At −0.9 V vs. Ag/AgCl, an FE of 46% was obtained for SnO2-NCNT/GCE, but an FE of only 10% was reached for NCNT/GCE.…”

Transient response of an annular interfacial crack between dissimilar piezoelectric layers under mechanical and electrical impacts

“…Chen et al [20] considered the dynamic fracture problem of a purely elastic and piezoelectric bi-material containing a semi-infinite crack along the interface by integral transform methods in conjunction with the direct application of the Wiener-Hopf technique and the Cagniard-de Hoop method of Laplace inversion. Huang and Wang [21] investigated the dynamic behavior of a piezoelectric layer bonded to an elastic medium containing multiple interfacial cracks subjected to steady state mechanical loads by using the integral transform technique and a pseudo-incident wave method. To our best knowledge, to date the analysis on dynamic problem of an annular crack between dissimilar piezoelectric layers has not been reported.…”