Borysovska K. The modeling of defects structure under stress and connection evolution of defects with stress-strain diagram

Українська версія

Thesis for the degree of Candidate of Sciences (CSc)

State registration number

0408U002507

Thesis Registration Form

0408U002507.pdf

Applicant for

Specialization

  • 01.04.07 - Фізика твердого тіла

14-05-2008

Specialized Academic Board

Д 26.207.01

Institute for Problems in Materials Science

Essay

The influence of defects evolutions on stress-strain curve behavior of solids on different scale levels was studied by computer modeling: on the atom level - the molecular dynamic method was used, on the microlevel - the dislocations dynamic method was used and on the mesolevels - the dynamic of mesodefects method was used. It was shown the nonlinear of stress - strain curve connect with evolution of defects. The minimal distance between walls of dislocations same sign was calculated. The several regimes of Frank-Read source was establishment: pile-up, polygonization walls and beating regime: sometimes the pile-up, sometimes the polygonization walls. The influence of substructure on distribution and structure rebuilding near crack tip was analyzed. It was shown the influence of number of dislocations is lower than the influence of the substructure tip.

Read more

Files

III_razdel.doc

II_razdel.doc

IV_razdel.doc

IV_razdel_3.doc

I_Lit_obzor.doc

V_razdel.doc

Автореферат.doc

Введение.doc

Выводы.doc

Литература.doc

Содержание.doc

титул.doc

Similar theses

0424U000081

Igor G. Churilov

Peculiarities of thermal influence on morphological changes and the mechanism of liquid phase formation in condensed one-component films (Pb, Sn, In, Bi) and in binary layered films (Bi/Sn, Pb/Sn, Pb/In)

0424U000065

Mazur Dmytro V.

X-ray absorption and magnetic circular dichroism spectra features in compounds containing oxygen and based on 4th period metals

0523U100214

Serhii V. Oliinyk

Physical basis of formation of electrical and photoelectric properties of AIIBVI crystals and electrical properties of multicomponent coatings

0522U100045

Bohdanov Yevhen Ivanovych

Effects of azimuthal asymmetry of radiation scattering in crystals and new possibilities of diffuse-dynamical diffractometry

0522U100002

Vladymyrskyi Igor A.

Thermally-induced structural phase transitions in heterogeneous systems based on magnetic and nonmagnetic nanolayers