engleski

About a Crack in Piezoceramic Element of Electromechanical Device on the Ship

The future of maritime cannot be imagined without nanotechnology. It is increansingly implemented in electronic and computer components of every modern ship’ s automatic system. In manufacturing of these components such as sensors, transducers, actuators and other electromechanical devices, piezoelectric materials have been and will be used. It is well known that various defects in material, such as dislocations, cracks and inclusions can adversely influence the integrity and performance of such devices. Therefore, it is very important that the behaviors of these defects are analyzed under real electromechanical load. These defects can be observed on very small dimensions, at atomic level. This paper analyses a screw dislocation around finite crack in a hexagonal ceramic crystal subjected to antiplane mechanical and in-plane electrical loads. The linear piezoelectric theory, complex analytic functions and conformal mapping method are used, and the forces acting on a dislocation are determined. The numerical results are obtained in MatLab and they are presented in 2D and 3D graphs.

crack; dislocation; electromechanical load; piezoceramic element

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