Sivetskiy V.I.

Wall Boundary Layer’s Viscosity Definition in the Forming Equipment Channels for Polymers Processing

The research objective is definition of the processed polymeric material melt properties in a wall boundary layer of working equipment channels. Setting the slip coefficient, that provides a linear relation between the viscosity in the boundary layer and the slip coefficient which often don't correspond to reality is a standard procedure in one of the most common polymer melts flow numerical simulation software package Ansys Fluent.

Physical Models of Ultrasonic Influence are in Liquid Compositions of Epoxy Polymers. Part 2. Physical Model of the Process of Ultrasonic Influence of Different Frequency

Relying on the analysis of durability and operating characteristics of boundary hardened unfilled epoxy polymers obtained during ultrasonic influence with different frequencies at pressure variation on liquid epoxy compositions and their further hardening, we prove the corresponding physical model. We propose the effective parameters of the combined ultrasonic influence (frequency, amplitude, intensity, pressure) by example of shaping epoxy polymers with the form memory effect.

Physical Models of Ultrasonic Influence in Liquid Compositions of Epoxy Polymers. Part 1. Physical Model of the Process of Low Frequency Ultrasonic Cavitation

In this paper, we analyze the origin and development of the process of low frequency ultrasonic cavitation in the liquid epoxy oligomer of ЕD-20 brand depending on time of its insonation. We provide the rationale for the physical model of low frequency ultrasonic cavitation in liquid compositions of epoxy polymers. Specifically, it allows choosing effective parameters of this process (frequency, amplitude, intensity) and at the same time ensuring structural integrity of sonicated epoxy compositions.

The discrete mathematical models for calculation of elastic-viscid-plastic environments with variable compressibility at thermopower loadings

In this paper, we construct the universal correlations of mechanics of continuous environments on the base of moment chart of finite elements. They allow designing the thermostress state and the processes of processing and formation of such nonlinear working environments as polymers fusions, friable and plastic masses in the products, given that hardening and the influence of remaining tensions on the properties of the end products are considered.