The Experts below are selected from a list of 59457 Experts worldwide ranked by ideXlab platform
Ladislav Ceniga - One of the best experts on this subject based on the ideXlab platform.
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Thermal Stresses in isotropic triaxial anisotropic particle matrix system
Meccanica, 2010Co-Authors: Ladislav CenigaAbstract:The paper deals with an analytical model of Thermal Stresses acting in an particle-matrix system represented by one isotropic spherical particle embedded in a triaxial-anisotropic infinite matrix, or by one triaxial-anisotropic spherical particle embedded in an isotropic infinite matrix. The Thermal Stresses originate during a cooling process as a consequence of the difference in Thermal expansion coefficients between a matrix and a particle.
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Thermal Stresses in triaxial anisotropic particle matrix system
Journal of Thermal Stresses, 2004Co-Authors: Ladislav CenigaAbstract:This paper deals with Thermal Stresses in an anisotropic particle–matrix system. The particle–matrix system is represented by one spherical triaxial anisotropic particle embedded in the infinite triaxial anisotropic matrix. The Thermal Stresses originate during a cooling process as a consequence of the difference in Thermal expansion coefficients between the matrix and the particle.
Vijay B. Patil - One of the best experts on this subject based on the ideXlab platform.
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Thermal Stresses of semi infinite Rectangular slab with internal heat source
IOSR Journal of Mathematics, 2013Co-Authors: Vijay B. PatilAbstract:The main purpose of this paper to solve three dimensional thermoelastic problem of Thermal Stresses of semi infinite rectangular slab with internal heat source to determine temperature distribution, Thermal displacements stress functions, at any point of the rectangular slab with given boundary conditions by applying the finite Marchi-Fasulo integral transform and infinite Fourier cosine transform technique.
Nida Zahra - One of the best experts on this subject based on the ideXlab platform.
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analysis of Thermal Stresses induced in radiant tubes for heat exchanger applications using finite element method
Nucleus, 2018Co-Authors: Naseem Abbas, A Abbas, Nida ZahraAbstract:In this research, the Thermal Stresses in the radiant tubes were analyzed using finite element method successfully. Thermal Stresses are critical factor influencing on the strength of heat exchanger tubes. Radiant tube of Steel Alloy, Super 22H was analyzed by using finite element analysis. It is investigated that Thermal Stresses in radiant tubes faces different temperature gradients in axial, circumferential and radial directions. There are no significant Thermal Stresses in axial direction when there is linear temperature gradient. In addition, it is observed that considerable Thermal Stresses are induced with nonlinear temperature gradient in axial direction. In order to calculate Thermal Stresses in circumferential direction, the temperature variations in angular position is also applied. Radial Thermal Stresses are calculated by applying specific temperature difference between inner and outer radii. Localized heating & hot spot in inner or outer radii and bend in tubes are also major causes of Thermal Stresses.
Mariusz Banaszkiewicz - One of the best experts on this subject based on the ideXlab platform.
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on line monitoring and control of Thermal Stresses in steam turbine rotors
Applied Thermal Engineering, 2016Co-Authors: Mariusz BanaszkiewiczAbstract:Abstract The requirement of high operational flexibility of utility power plants creates a need of using on-line systems for monitoring and control of damage of critical components, e.g. steam turbine rotors. Such systems make use of different measurements and mathematical models enabling calculation of Thermal Stresses and their continuous control. The paper presents key elements of the proposed system and discusses their use from the point of view of thermodynamics, heat transfer and solid mechanics. Thermodynamic relationships, well proven in design calculations, are applied to calculate on-line the steam temperature at critical locations using standard turbine measurements as input signals. The model predictions are compared with operational data from a real power plant during a warm start-up and show reasonably good accuracy. The effect of variable heat transfer coefficient and material properties on Thermal Stresses is investigated numerically by finite element method (FEM) on a cylinder model, and a concept of equivalent Green's function is introduced to account for this variability in Thermal stress model based on Duhamel's integral. This approach was shown to produce accurate results for more complicated geometries by comparing Thermal Stresses at rotor blade groove computed using FEM and Duhamel's integral. Finally, the applicability of Neuber's and the Glinka–Molski rule with ideal elastic and bilinear material model to estimating elasto-plastic strains at the rotor groove was investigated by FEM. For the considered groove geometry, Neuber's rule with bilinear material model resulted in most accurate strain predictions.
B. J. Gireesha - One of the best experts on this subject based on the ideXlab platform.
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Thermal Stresses and efficiency analysis of a radial porous fin with radiation and variable Thermal conductivity and internal heat generation
Journal of Thermal Analysis and Calorimetry, 2021Co-Authors: G. Sowmya, B. J. GireeshaAbstract:The porous fin of radial profile is considered in the current analysis along with the radiation and Thermal-dependent internal heat generation condition. In addition, two different cases have been examined based on the linear dependency and exponential dependency of Thermal conductivity on temperature. The Darcy’s law is used to study the porous nature of fin. The modeled governing equation is a second-order nonlinear ordinary differential equation and is solved via Runge–Kutta–Fehlberg fourth–fifth-order method. The important terms are grouped as dimensionless parameters and discussed their influence on the heat transfer rate and Thermal Stresses of the fin. The Thermal Stresses like radial stress and tangential stress are addressed comprehensively and interpreted graphically. Also, the fin efficiency is defined and discussed graphically. It is found that the tangential stress shows higher compression near fin base region and larger tensile stress near tip radius.
