Репозиторий БНТУ, 2014

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43 /.. // /.. - // Dub S.N. The effect of loading rate on the mechanism of plastic deformation in bismuth studied b instrumented sharp indentations / S.N. Dub O.M. Ostrikov // Smposium Z : Multiscale Materials Modeling / MRS Fall Meeting. Boston USA. P /.. // : XXXVII Macroscopic brittleness and local plasticit of amorphous allos on iron base / M.N. Vereschagin V.G. Shepelevich S.V. Shilko O.M. Ostrikov // Mechanics of Composite Materials. Riga Latvia /.... // - : / /. // : / /... // 41

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48 SUMMARY Ostrikov Oleg Mikhalovich Numerical and analtical methods of calculation of plastic deformations and stresses in the areas of micro-localization of solids under the action of eternal loads Kewords: stress field displacement deformation twinning inhomogeneous plastic deformation nanotwinning The work purpose: to develop the theor of twinning and inhomogeneous plastic deformation and development of methods for calculating the stress state of the deformable solids at the stage of damage accumulation. The thesis used eperimental and theoretical research methods. Eperimental studies formed the wasps nova theor developed and used for the verification of the results based on it. At the same time to stud the mechanisms of deformation of solids used technique of local dosed surface deformation and uniaial tension. To test the structure of deformable materials used modern research methods such as atomic force microscop scanning and transmission electron microscop X-ra diffraction electron microprobe analsis. In theoretical studies of widel used method of superposition of stress twinning dislocations Green's function method the method of the electrostatic analog computer simulation. First solved the problem of solid mechanics related to the calculation of stresses in the deformable lookalike or amorphous material and quantif the stresses due to twins or shear bands. It is shown that two-dimensional defects materiall affecting the deformation pattern that is generated b the eternal loads.the results found in the practical implementation of education and science and are recommended for use in industr to improve the qualit of forecasting resource used in mechanical strength twinning and rapidl quenched materials. 46

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