Влияние технологии изготовления и количества наполнителей типа УНТ на свойства полимерных композитов

Объектом исследования является (ются) полимерные композиты с различными наполнителями на основе СВМПЭ, их плотность твёрдость прочность и износ.The object of the study is (are) polymer composites with various fillers based on UHMWPE, their density hardness, strength and wear

Self-consistent treatment of bubble nucleation at the electroweak phase transition

In the standard procedure for calculating the decay rate of a metastable vacuum the solution of the classical Euclidean equation of motion of the background field is needed. On the other hand radiative corrections have to be taken into account already in the equation of motion. Hence, the latter one has to be the functional derivative of the effective action with respect to the background field. This is of crucial importance in theories in which the symmetry breaking is due to radiative corrections. Usually the effective potential is considered only, neglecting the corrections due to the derivative terms of the effective action. In this article a bounce solution from an equation of motion which takes into account the full effective action in the one-loop approximation is calculated. A computational method that yields a strict separation of the divergent contributions to the effective action from the convergent ones is obtained. This allows a wide freedom in the choice of regularization and renormalization schemes. The model under consideration is the SU(2)-Higgs model. The fluctuations of the complete bosonic sector, i.e. gauge field, Higgs and Goldstone boson contributions, are taken into account. The bounce is then self-consistent to one-loop order. The obtained results for characteristic quantities of the transition as the nucleation rate and the number of nucleated bubbles per volume are compared to other, non-self-consistent approaches.Comment: 21 pages, LaTeX2.09, 6 Postscript figures, uses revtex.sty, aps.sty, and epsfig.sty. Changed content. Revised version. Accepted for publication by Phys. Rev.

Моделирование ударно-волновых процессов и разрушения твердых тел при электроразрядном отколе

Выпускная квалификационная работа содержит 123 с., 33 рис., 25 табл., 59 источников, 1 приложение. Ключевые слова: ЭЛЕКТРОРАЗРЯДНЫЙ ОТКОЛ, УДАРНО-ВОЛНОВЫЕ ПРОЦЕССЫ, МОДЕЛИРОВАНИЕ РАЗВИТИЯ РАЗРЯДА, ЭЛЕКТРОРАЗРЯДНОЕ РАЗРУШЕНИЕ, БЕТОН. Объектом исследования является электроразрядный откол. Цель работы – исследование закономерностей эволюции амплитудно-временных параметров ударно-волновых возмущений, генерируемых расширяющейся плазмой канала и характеристик разрушения при шпуровом электровзрыве в твердых телах. В процессе исследования с помощью разработанной физико-математической модели были проведены компьютерные эксперименты по электроразрядному отколу в твердых конденсированных средах при различных условиях и параметрах разрядной цепи и взрываемого проводника.Final qualifying work consists of 123 pages, 33 figures, 25 tables, 59 sources, 1 application. Keywords: ELECTRODISCHARGE BREAKAWAY, SHOCK-WAVE PROCESS, MODELLING OF DISCHARGE DEVELOPMENT, ELECTRODISCHARGE DESTRUCTION, CONCRETE. The object of the research is electric-breakaway. Objective - study of patterns of evolution of amplitude-time parameters of the shock-wave perturbations generated by the expanding plasma channel and fracture characteristics at electric explosion in a hole in solids. The study with the help of the developed physical and mathematical models have been carried out by the electric discharge spalling computer experiments in the solid condensed matter under various conditions and parameters of the discharge circuit and blasted conductor