Mechanics

Plate Braking Against the Layerof «Delayed» Viscoplastic Fluid with Regard to Wall Sliding

Authors: Safronchik M. I.

The paper presents the problem of unstable viscoplastic fluid flow between parallel planes, one of which is fixed, while the other one is put in motion from a standstill under the influence of constant force. Viscoplastic fluid flow develops gradually. The border of the flow is not known in advance and is to be determined in the process of solving the task. The force applied to the upper plate is chosen so as to cause the effect of sliding along the two plates in the course of time.

Some Aspects of Applying Finite Element Method to Contact Problems Using ABAQUS System

Authors: Ovchinnikova N. V., Chebotarevsky U. V.

In this paper the selection of preferred computational scheme for numerical research of a contact interaction between a rigid indentor andanelastic-plastichalf-spaceusing ABAQUS system is фdescribed. Furthermore, the critical values of the load applied to indentor which don’t cause plastic deformation in the material and subsequently don’t effect the process of a surface hardening are determined. Some peculiarities of the forming of near-surface plastic region by static loading are investigated.

Modeling of Motion of the Complex Elastic System

Authors: Borisov M. V., Avramenko A. A.

The purpose of article is a receipt of mathematical model of motion of the complex elastic system. The normal modes and frequencies are searched by decomposition of vibrations on the modes of stationary elements of the system. It allows to transform partial differential equations of motion in ordinary differential equations. The motion of a space craft which consists of elastic large size elements (solar panels) is modeled.

Mathematical Modeling of Longitudinal Blauofthe System of Homogeneous Rodsabout Rigid Barrir at Increase Long Solids

Authors: Bityurin A. A., Manzhosov V. K.

Mathematical modeling of longitudinal elastic central blow of non-homogeneous rod system about a rigid barrier is carried out, at not-holding connections. Mathematical modeling is carried out by the exact analytical decision of the wave differential equation by method of Dalamber with the setting of necessary initial and boundary conditions. The rod system consists of a step non-homogeneous rod and a homogeneous rod of constant cross section. Connections with a rigid barrier and between rods are not-holding.