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Information × Registration Number 0213U004783, 0113U002814 , R & D reports Title Deformation and fracture modelling for structures with internal and interfacial defects taking into account interaction and contact of their surfaces under mechanical, thermal and electrical loads. popup.stage_title Head Kit Hryhorij Semenovych, Registration Date 25-12-2013 Organization Pidstryhach Institute of Applied Problems of Mechanics and Mathematics NAS of Ukraine popup.description2 The thermostressed state of a homogeneous body with a crack of variable height, which is filled with a heat-conductive medium, has been investigated. The body is subjected to the action of tensile load causing an increase in thermal resistance of the crack and the action of compressive load at which partial contact of crack surfaces occurs and its thermal resistance decreases. The problems of heat conduction for homogeneous bodies with thermally active and heat-permeable plane cracks have been reduced to two-dimensional singular integral equations (SIE) for density of heat sources and density of heat dipoles, respectively; and the thermoelastic problems - to a system of SIEs for displacement jumps. An analytical solution to the thermoelastic problem for a body with a circular crack having variable thermal resistance, when the heat flow distributed by a cubic polynomial is imposed to the crack, has been constructed. The thermoelastic problem for a bimaterial having an interface crack with a heat-conductive filler and surface films in the case of partial closure of the crack has been reduced to a system of non-linear singular integro-differential equations for crack opening and temperature jump between crack surfaces. On the basis of the method of successive approximations, an analytical-numerical technique has been developed for solving this system. The distribution of stresses and electrical displacement at the continuation of electrically insulated and electrically permeable crack in a thin adhesive perfectly elastic-plastic layer between two identical piezoelectrical half-spaces has been analyzed by employing FEM. Determination of a stress state in such a structure, when the crack has finite electrical permeability, in the case of rise of interface zones of mechanical and electrical pre-fracture with different load-dependent lengths has been reduced to a system of boundary value problems, which has been solved analytically. Product Description popup.authors Волошко О.І. Говоруха В.Б. Кіт Г.С. Козінов С.В. Лобода В.В. Мартиняк Р.М. Середницька Х.І. Слободян Б.С. Сушко О.П. Чумак К.А. popup.nrat_date 2020-04-02 Close