scholarly journals Influence of spatial inhomogeneity of environment temperature on temperature oscillations and thermocyclic stresses in elastic half-space

2019 ◽  
Vol 196 ◽  
pp. 00027
Author(s):  
Maxim Supel’nyak
Keyword(s):  
Heat Transfer ◽  
Temperature Field ◽  
Half Space ◽  
Double Fourier Series ◽  
Elastic Half Space ◽  
Spatial Inhomogeneity ◽  
Quasistatic Problem ◽  
Temperature Oscillations ◽  
Environment Temperature ◽  
Deformed State

Elastic half-space on which surface the heat transfer follows the Newton-Richmann law where enviroment temperature is a periodic function of time and spatial variable is investigated. A temperature field and a stressed deformed state of half-space is found after the solution of a quasistatic problem of thermoelasticity. The solution is received in the form of double Fourier series.

scholarly journals Contact interaction of prestressed annular punch and half-space

2020 ◽  
pp. 24-30
Author(s):  
S.Yu. Babich ◽  
◽  
N.O. Yaretska ◽  
Keyword(s):  
Half Space ◽  
Contact Interaction ◽  
Elastic Half Space ◽  
Theory Of Elasticity ◽  
Natural State ◽  
Small Perturbations ◽  
Linearized Theory Of Elasticity ◽  
Annular Punch ◽  
Linearized Theory ◽  
Deformed State

The article is devoted to the task of contact interaction of the pressure of a pre-stressed cylindrical annular punch on the half-space with initial (residual) stresses without friction. It is solved for the case of unequal roots of the characteristic equation. In general, the research was carried out for the theory of great initial (ultimate) deformations and two variants of the theory of small initial ones within the framework of linearized theory of elasticity with the elastic potential having any structure. It is assumed that the initial states of the elastic annular stamp and the elastic half-space remain homogeneous and equal. The study is carried out in the coordinates of the initial deformed state, which are interrelated with Lagrange coordinates (natural state). In addition, the influence of the annular stamp causes small perturbations of the basic elastic deformed state. It is assumed that the elastic annular stamp and the elastic half-space are made of different isotropic, transversal-isotropic or composite materials.

Thermoelastic Contact Between a Rolling Rigid Indenter and a Damaged Elastic Body

1990 ◽  
Vol 112 (2) ◽  
pp. 382-390 ◽  
Author(s):  
T. Goshima ◽  
L. M. Keer
Keyword(s):  
Heat Transfer ◽  
Stress Intensity ◽  
Half Space ◽  
Singular Integral Equations ◽  
Elastic Half Space ◽  
Two Dimensional ◽  
Intensity Factors ◽  
Thermoelastic Contact ◽  
Surface Breaking Crack ◽  
Thermoelastic Contact Problem

The two-dimensional thermoelastic contact problem of a rolling, rigid cylinder on an elastic half space containing a surface-breaking crack is solved using complex variable techniques. The effects of heat generation and friction between the cylinder and half space and of friction and heat transfer on the faces of the crack are considered. The problem is reduced to a pair of singular integral equations which are solved numerically. Numerical results are obtained when the loading is a Hertzian distributed heat input. By consideration of combinations of parameters, stress intensity factors for which the crack is likely to grow are shown.

Characteristic Analysis of Rural Environment Temperature Field

2013 ◽  
Vol 807-809 ◽  
pp. 14-19
Author(s):  
Jiu Xi Shi ◽  
Jin Song Deng ◽  
Xiao Ming Wang
Keyword(s):  
Heat Transfer ◽  
Temperature Field ◽  
Brightness Temperature ◽  
Mixed Model ◽  
Heat Transfer Model ◽  
Rural Environment ◽  
Transfer Model ◽  
Characteristic Analysis ◽  
Infrared Band ◽  
Environment Temperature

Taking villages in the northern plain of Shaoxing County Zhejiang Province as the research object and by using heat transfer model and remote sensing image analysis method and taking advantage of surface temperature information varying in different areas recorded by ETM thermal infrared band and through selection of special endmember, we realize the separation of background and ambient superposed brightness temperature and establish statistical model on change of superimposed environmental brightness temperature based on distance and analyze characteristics of rural environment temperature field according to the features of heat exchange type. Study shows that endmember brightness temperatures of different surface features in the study area are respectively as follows: hard surface is 304.663K, water body is 297.851K, grassland is 298.966K, woodland is 298.827K; superimposed environmental temperature in village area is about 1.737K. Environment superposed brightness temperature and distance function are tools to describe the temperature field, predicting pixel brightness temperature by using the heat transfer model is more accurate than using linear spectrum mixed model.

TEMPERATURE FIELD AND HEAT TRANSFER IN LOW REYNOLDS FLOWS INSIDE TRAPEZOIDAL-PROFILED CORRUGATED-PLATE CHANNELS

2015 ◽  
Vol 22 (4) ◽  
pp. 329-343 ◽  
Author(s):  
Jozef Cernecky ◽  
Jan Koniar ◽  
Lukas Ohanka ◽  
Zuzana Brodnianska
Keyword(s):  
Heat Transfer ◽  
Temperature Field ◽  
Low Reynolds

The efficiency of application of virtual cross-sections method and hypotheses MELS in problems of wave signal propagation in elastic waveguides with rough surfaces

2016 ◽  
pp. 3564-3575 ◽  
Author(s):  
Ara Sergey Avetisyan
Keyword(s):  
Half Space ◽  
Cross Sections ◽  
Classical Method ◽  
Signal Propagation ◽  
Elastic Half Space ◽  
Layered Systems ◽  
Surface Layers ◽  
Inhomogeneous Surface ◽  
Wave Signal ◽  
The Impact

The efficiency of virtual cross sections method and MELS (Magneto Elastic Layered Systems) hypotheses application is shown on model problem about distribution of wave field in thin surface layers of waveguide when plane wave signal is propagating in it. The impact of surface non-smoothness on characteristics of propagation of high-frequency horizontally polarized wave signal in isotropic elastic half-space is studied. It is shown that the non-smoothness leads to strong distortion of the wave signal over the waveguide thickness and along wave signal propagation direction as well.  Numerical comparative analysis of change in amplitude and phase characteristics of obtained wave fields against roughness of weakly inhomogeneous surface of homogeneous elastic half-space surface is done by classical method and by proposed approach for different kind of non-smoothness.

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