Definition and mathematical modeling of the thermostressed state of a two-component thermosensitive cylinder under convective-radial heating
Journal Title: Вісник Тернопільського національного технічного університету - Year 2015, Vol 77, Issue 1
Abstract
The thermosensitive body model is used in order to implement the requirements of modern engineering practice for the calculation of temperature fields and tensions in multilayer structures operating under high-temperature heating. The thermosensitive body model takes into account the dependence of the thermal and mechanical characteristics of the material components on the temperature. Such models describe their thermal and thermostressed state more accurately. However, these problems usually do not have exact analytical solutions, and therefore require the development of new methods for their solution. It is also important to take into account their actual heating conditions and interaction with the environment. In this article the nonlinear mathematical model of temperature distribution in a two-component thermosensitive cylinder based on the thermosensitive body model is defined. It occurs under conditions of complex heat transfer on flat limiting surfaces, in particular the constant temperature from one side cylinder and the convective-radial heat transfer with the environment of constant temperature from another. There are also evenly distributed heat sources on the adjacent surface of the cylinder components that produce thermal flow. The temperature tensions which were caused by defined temperature distribution have been found. In order to estimate the influence of the thermosensitivity of the material of cylinder components the same nonlinear mathematical model of temperature distribution was created, but for nonthermosensitive cylinder. The influence of the thermosensitivity of thermal and mechanical characteristics of the material components on the nature and extent of temperature and stresses distribution depending on the input parameters have been investigated. It was established, that it is of great importance to take into account the thermosensitivity of materials, as the maximal differences between the thermosensitive and non-thermosensitive cylinders with basic and average integral values can reach the large values. However, in order to make a rapid assessment of the temperature and stresses distribution under conditions of the above complex heating and composition of the materials, it is necessary to use the basic values of thermomechanical characteristics.
Authors and Affiliations
Iryna Rakocha, Volodymyr Valiashek
Keywords
Related Articles
- EP ID EP571917
- DOI -
- Views 52
- Downloads 0
Improvement of the stress evaluation using conditive functions
The results of the study of the technical aspects of the problem of human cognitive function-evaluation operator (the human capacity to understand, to learn, understand, perceive and process external information) for the...
Mathematical model of edge crack development at bending thin-walled Z-shaped profile
We consider engineering methods for determining stress intensity factors for defective items open structure bending. Characteristic under development boundary cracks Z-shaped profile. The mathematical model and removed d...
Undestroying control and diagnostics of rolling bearings
Rolling bearings are the most widespread and the most vulnerable element of any mechanism. They carry out the spatial fixing of the revolved details and are subject to main static and dynamic efforts arising in a mechani...
Phonocardiosignal as a periodically correlated stochastic process preprocessing algorithm structure grounding
For the cardiovascular desease early diagnosis by the remote monitoring systems the fonokardiosyhnal (as periodically correlated random process) simultaneously registered with electrocardiosignal usage is proposed. An re...
Methodology for the experimental research of reinforced cylindrical shell forced oscillations
In the paper the methodology for experimental studies of forced oscillations of a horizontally oriented cylindrical shell which is reinforced from the inside by stringers and bulkheads using the servo-hydraulic test mach...