ASSESSMENT OF PURITY OF SWITCHING OFF AND INCREASE IN RELIABILITY OF WORK OF THE MASTER CLUTCH WITH THE FRICTION DISKS WORKING IN OIL

Methodology of determination of moment of conduct is worked out are leashes, at the shutdown of master clutch with the disks of friction, working in transmission oil, tracked vehicle by mass a 17,5 t, taking into account tensions of internal friction in moving layer of oil. Solutions are proposed on reduction of partial transmission of moment from a leading disk to slave, for example, use of technical design with automatic installation of spacing between all disks of friction at switching off of main friction clutch The developed technical solutions increase reliability of work of the clutch with the friction disks working in oil and also can be used for new projects and modernizations of the existing designs.

Theoretical study of the process of interaction of particles of weed impurities in the flow of raw cotton with the working bodies of the cleaning machine

The article proposes to use the Euler equations to describe the motion of a stationary flow in the cleaning zones, which allows determining the laws of pressure, density and velocity distribution along the arc of contact of a moving layer of raw cotton with a mesh surface in the process of impact impact with spikes on the pulp. It has been established that the pressure, densities and flow rates along the cleaning arc as a result of hammer spikes vary in steps, with a decrease in pressure and density and an increase in the flow velocity along this arc.

Legendre Wavelet Modified Petrov–Galerkin Method in Two-Dimensional Moving Boundary Problem

In this study, we developed the two-dimensional Legendre wavelet modified Petrov–Galerkin method for solving the two-dimensional moving boundary problem arising during melting of solid whose one surface is kept under most generalised boundary condition, and other two surfaces are insulated. The particular cases when surface subjected to the boundary condition of first, second and third kinds are discussed in detail. For validity of the present method, we have plotted graphs between residual (obtained from the original differential equation and its associated boundary conditions) and x-axis and found the effect of an error on moving layer thickness and y coordinate, respectively. Furthermore, we proved the convergence analysis of present method. The effect of parameters (Predvoditelev number, Kirpichev number, Biot number) on the moving layer thickness is discussed in detail. The whole analysis is presented in a dimensionless form.

From Damage to Fracture, a Modelization Based on Moving Discontinuities and Layers

A damage modelization is proposed based on a continuous transition from undamaged to damaged material. The evolution of damage is associated with a moving layer of finite thickness $l_c$, then initiation and propagation of damage can be unified in the same constitutive law. The driving force associated to the layer motion is a generalized release rate of energy. Using a normality rule based on this force the solution of the rate boundary value problem of propagation and displacement satisfies a variational inequation. Applications of the model are proposed.