Abstract
This study is concerned with the transient response of a piezoelectric ceramic strip containing two coplanar cracks under antiplane mechanical and inplane electric impacting loads. By applying the electromechanical dislocation concept and Laplace and Fourier transforms, the current mixed boundary value problem is reduced to Cauchy-type singular integral equations, in the Laplace plane, which are solved numerically. Laplace's inversion was then performed to obtain the dynamic electromechanical fields in the physical plane. The time variations of the resulting dynamic stress and electric displacement intensity factors are formulated in terms of the applied electromechanical impact and cracked strip configurations. The results reveal that the presence of the dynamic electric field could impede or enhance the propagation of the crack in piezoelectric ceramics depending upon the time elapsed and the specific configuration considered.
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