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Information × Registration Number 0218U002194, 0115U002393 , R & D reports Title Development of techniques for solving fundamental problems of strength and fracture piecewise homogeneous bodies, compiled from smart materials popup.stage_title Head Loboda Volodymyr Vasyljovych, Registration Date 30-01-2018 Organization Oles Honchar Dnipro National University popup.description2 The object of the study is the process of deforming of composites with cracks at the interface between intellectual materials and in a thin adhesive layer that combines its piezoelectric and piezoelectromagnetic components. The purpose of the project is the development of techniques and the solution of a number of new tasks of fracture mechanics for composite bodies made of isotropic piezoelectric and piezoelectromagnetic materials under the action of mechanical loading, electric, magnetic and thermal fields, in particular, construction of a solution for piezoelectromagnetic bimaterial with interfacial crack, which takes into account its electrical and magnetic permeability, under the influence of different types of mechanical loading, electric and magnetic fields. In general, analytical methods of investigation, in particular, the apparatus of the theory of functions of a complex variable, were used. In the study of bodies of finite dimensions, the method of finite elements was used. An electroded crack between two piezoelectric materials under the action of mechanical loading and electric flow parallel to the crack faces was investigated. The processes of destruction of piezoelectric smart materials with the consideration of reorientation of domains at the top of the crack / electrode and the use of cohesive elements on the example of a multilayer actuator are analyzed. The complex of the problems concerning the definition of electromechanical factors and the relative length of the contact area for a bimaterial piezoelectromagnetic space with an electrically and magnetic conduction crack at the interface between materials under the action of electric and magnetic fluxes and mechanical loading at infinity are solved. The formation of cracks, which is connected with the preliminary appearance of thin strips of localization of plastic deformation, is analyzed. Issues related to these strips are considered, provided that they are located in the adhesion layer between two materials. All the obtained results are new, that was confirmed during their presentation at international scientific conferences and publications in the leading international editions. The same fact confirms their effectiveness. The results can be used in the areas connected with design and construction of piezoelectric materials. Product Description popup.authors Гергель Ірина Юріївна Гриневич Аліна Олександрівна Онопрієнко Олег Дмитрович Ходанен Тетяна Володимирівна Шевченко Артур Григорович popup.nrat_date 2020-04-02 Close