摘要:

In this paper, we consider the problem of thermal stresses in an infinite plate with a pair of circular holes that are filled with elastic inclusions of another material. A steady-state temperature is induced by a pair of heat sources (positive and negative sources) placed on the x-axis. The analysis is developed by the Airy stress function in the case of generalized plane stress and by applying the bipolar coordinates. The method of perturbation is adopted for the determination of the unknown coefficients involved in the solution. Numerical calculations of the stress distributions along main parts of the infinite plate and the inclusions are worked out in some detail. The maximum stresses on the common boundaries are also calculated and compared with the available results.

ISSN:0149-5739    

DOI:10.1080/01495738608961883

出版商:Taylor & Francis Group    

年代:1986

数据来源: Taylor

摘要:

This paper analyzes, the transient response of one-dimensional axisymmetric quasi-static coupled thermoelastic problems. Using the Laplace transform with respect to time, the general solutions of the governing equations are obtained in the transform domain. Also presented are the numerically transient distributions of stress and temperature increments in the real domain for the case of an infinitely long annular cylinder. The inversion to the real domain is obtained by using a Fourier series technique and matrix operations simultaneously, therefore no thermoelastic potentials are introduced in the solution process. It is shown that the coupling effect behaves as a clear lag in both the stress and the temperature distributions.

ISSN:0149-5739    

DOI:10.1080/01495738608961884

出版商:Taylor & Francis Group    

年代:1986

数据来源: Taylor

摘要:

Through the use of a constrained Newton-Raphson time stepping finite element scheme, the inelastic thermomechanical response of ceramic coated gas turbine parts is considered. Due to the generality of the solution procedure developed, the combined thermoelastic-plastic-creep properties associated with ceramics is treated. This includes the handling of temperature-dependent elastic-plastic creep and thermal material properties. To illustrate the procedure, the thermomechanical response of ceramic coated outer gas path seals is considered. This includes the evaluation of time-dependent thermal ratcheting and its concomitant residual stress and strain fields.

ISSN:0149-5739    

DOI:10.1080/01495738608961885

出版商:Taylor & Francis Group    

年代:1986

数据来源: Taylor

摘要:

The stress-temperature variational principle of thermoelasticity with two relaxation times is used to obtain an approximate solution of an one-dimensional initial-boundary value problem for a half-space. It is assumed that initial conditions are homogeneous and a thermoelastic disturbance propagates throughout the half-space due to a smooth heating of its boundary. The variational principle is replaced by an approximate formulation in which a space finite element method is combined with a time approximation due to Gurtin. Numerical examples are given to show the influence of relaxation times on the propagating thermoelastic wave.

ISSN:0149-5739    

DOI:10.1080/01495738608961886

出版商:Taylor & Francis Group    

年代:1986

数据来源: Taylor

摘要:

Numerical analysis of static thermal stresses in a nonlinear, isotropic, thermaelas-tic, thick cylindrical shell and a cube is presented using the nonlinear thermoelas-ticity. The geometrical relations, equilibrium equations, and Fourier's law are linear while the constitutive relations accounting for the id-order elastic moduli and the temperature-dependent 2d-order elastic moduli and coefficient of thermal expansion are nonlinear. Nonlinear effects are numerically investigated for a cylindrical shell and a cube made of D54S aluminum alloy.

ISSN:0149-5739    

DOI:10.1080/01495738608961887

出版商:Taylor & Francis Group    

年代:1986

数据来源: Taylor

摘要:

An analysis is given for radial heat flow through the wall of a duplex heat exchanger tube with a pressure or gap-dependent contact resistance at the interface. Thermal expansion of the tube changes the value of this resistance, and it is shown that for certain thermal conditions there will be more than one steady-state solution. The stability of these multiple solutions is then investigated using a perturbation method, and it is found that there is always an odd number of solutions, alternately stable and unstable.

ISSN:0149-5739    

DOI:10.1080/01495738608961888

出版商:Taylor & Francis Group    

年代:1986

数据来源: Taylor

摘要:

A domain of influence theorem is proved for a general mixed problem of linear nonhomogeneous anisotropic coupled dynamic thermoelasticity with one relaxation time. The proof is based on a domain of dependence inequality associated with the problem. The domain of influence is constructed in terms of the bounds for ther-momechanical constitutive fields, the relaxation time, and the data supports.

ISSN:0149-5739    

DOI:10.1080/01495738608961889

出版商:Taylor & Francis Group    

年代:1986

数据来源: Taylor

ISSN:0149-5739    

DOI:10.1080/01495738608961890

出版商:Taylor & Francis Group    

年代:1986

数据来源: Taylor