No 1 (2014)
- Year: 2014
- Articles: 6
- URL: https://ered.pstu.ru/index.php/amcs/issue/view/395
- DOI: https://doi.org/10.15593/2499-9873/2014.1
Mesh convergence studying under simulation of gas dynamics and heat transfer processes in vortex tube
Abstract
The results of mesh convergence numerical studying under simulation of gas dynamics and heat transfer processes into a vortex tube are obtained using non-structured tetragonal mesh in a stationary case and are presented in the paper. A countercurrent flow vortex tube is chosen for the modeling and ideal gas is considered as the processing medium. Studying the dependencies of the integral (mass flow and full enthalpy) and the local (velocity distribution, hydrostatic pressure and temperature) parameters of the gas flux on the elements number into computation volume and on the time step is fulfilled. The substantial influence of the prismatic layers number on the distribution of the heat emission coefficient values along the internal surface of the energy separation chamber and the duct of a chilled flux is obtained.
Applied Mathematics and Control Sciences. 2014;(1):5-12
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Influence of biomechanical load on efforts in the human maxillofacial system
Abstract
Influence of malocclusion is given. It is one of the indicators of the state of maxillofacial system. Malocclusion influences on processes and structure of the body on the whole. This influence is created according to the concept of the virtual physiological human. The mathematical model of the influence of biomechanical load is created. It is occurred during process of closing upper and lower jaws and this load influences on the efforts of the masticatory muscles and the temporomandibular joint reaction. They influence on efforts of the maxillofacial system. Processes of breathing, swallowing and speech are closely linked with the maxillofacial system. Dependences of muscle efforts and the temporomandibular joint reaction on the angle of inclination of the occlusal plane are obtained. This angle is characterized a curve of closing the teeth of the upper and lower jaws. Maximum value of compressive force of the jaws is applied perpendicular to the occlusal plane in the region of the first molar. It is the assumption that the lower jaw in the last phase of the closing of the jaws is coming to the upper jaw along the circular arc.
Applied Mathematics and Control Sciences. 2014;(1):13-26
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Modeling of thermomechanical processes in ferromagnetic shape memory alloys under finite deformations
Abstract
Within the framework of finite deformations the model of ferromagnetic materials behavior during forward and reverse martensitic transformation in the process of deformation in the temperature and magnetic fields has been obtained. The variational formulation of the coupled magnetoelastic boundary value problem is carried out. The obtained relations have been used for the numerical solution of the problem by finite element method.
Applied Mathematics and Control Sciences. 2014;(1):27-38
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Numerical modeling of steel workpiece conditions technology process
Abstract
Three-dimensional numerical modeling of the stress and deformed conditions of workpiece from steel of the brand 30 XGSA in process rainfall is considered and when unloading. Calculation is perfromed on the basis of a final and element program SIMULIA/Abaqus.
Applied Mathematics and Control Sciences. 2014;(1):39-46
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Thermomechanics behavior research of photopolymer casting prototypes
Abstract
The work is aimed at casting prototypes frame stability issue, which is a cell structure. Exclusion possibility of ceramic mold cracking issue using cell structure is researched too. Stability criteria in process of making multilayer shell mold are found. The time of buckling in process of burning off the prototype at high temperatures and its influence on stress-strain state of construction are defined.
Applied Mathematics and Control Sciences. 2014;(1):47-54
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Numerical solution problem of the contact interaction in the involute splined connection
Abstract
The solution problem of the contact interaction in the involute splined connection is considered. The mathematical formulation of the problem of interaction of two elastic bodies is represented. The convergence of the numerical solution is investigated. The main results of the solution are presented in the form of the stress intensity fields and depending of contact area and contact pressure on external load value.
Applied Mathematics and Control Sciences. 2014;(1):55-63
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