Registration Number
0223U001839,
0121U109767
, R & D reports
Title
Models and methods of determining the fracture parameters of piezoactive and piezopassive composites with defects at the material’s interface
popup.stage_title
Head
Loboda Volodymyr V., Доктор фізико-математичних наук
Registration Date
03-02-2023
Organization
Oles Honchar Dnipro National University
popup.description2
A crack between two piezoelectric materials with two types of electrical conditions on its faces is investigated. In addition, two collinear interface cracks in a piezo-electromagnetic bimaterial with different electrical conditions on their edges are considered.
A crack along the separation boundary of two piezoelectric materials under the action of mechanical load and electric field was analyzed. The electric field is assumed to be parallel to the crack edges, and the electric boundary conditions on the crack may vary. The finite elements method is applied, which allows to determine the possible contact zones of the crack faces. Combinations of electrically conductive and electrically permeable boundary conditions on different parts of the crack faces are considered.
The interaction of electromagnetically conductive and electromagnetically permeable collinear cracks along the separation boundary of two piezoelectric materials under the action of an anti-plane mechanical load and an electric field was investigated. An analytical solution of this problem is given in a closed form for any distances between cracks, any lengths of cracks and any external loads of the above-mentioned type. The stress intensity factors for all crack tips were found and their change with respect to to the external load and the distance between the cracks was demonstrated. It is shown that when the cracks converge, the stress intensity coefficients increase, especially for adjacent crack tips.
All the obtained results are new and correspond to the world level, which was confirmed during the presentation of the obtained results at international scientific conferences and publications in leading international issues.
Field of application: aircraft engineering, rocket engineering, microelectronics.
Product Description
popup.authors
Adluckiy Victor Ya
Gergel Irina Yu
Dzyuba Oleksandr A
Komarov Оlexander V
Loboda Volodymyr V.
Hodanen Tetyana V
popup.nrat_date
2023-02-03
