Thermo-elastic Analysis of Functionally Graded Thick- Walled Cylinder with Novel Temperature – Dependent Material Properties using Perturbation Technique

Subject Areas : Journal of Simulation and Analysis of Novel Technologies in Mechanical Engineering

Alireza Nadafoskoue ¹ , hadi mohammadi hooyeh ²

1 - Assistant Professor, Faculty Member of Imam Hossein University (AS)
2 - Department of Solid Mechanics, Faculty of Engineering, Imam Hossein University, Tehran, Iran

Received: 2018-03-18 Accepted : 2018-07-04 Published : 2018-07-11

Keywords: Functionally graded material, : Infinite thick – walled cylinder, nonlinear heat transfer, classical perturbation method, Temperature-dependent properties,

Abstract :

In this work, thermo – elastic analysis for functionally graded thick – walled cylinder with temperature - dependent material properties at steady condition is carried out. The length of cylinder is infinite and loading is consist of internal hydrostatic pressure and temperature gradient. All of physical and mechanical properties expect the Poisson's ratio are considered as multiplied an exponential function of temperature and power function of radius. With these assumptions, the nonlinear differential equations for temperature distribution at cylindrical coordinate is obtained. Temperature distribution is achieved by solving this equation using classical perturbation method. With considering strain – displacement, stress – strain and equilibrium relations and temperature distribution that producted pervious, the constitutive differential equation for cylinder is obtained. By employing mechanical boundary condition the radial displacement is yield. With having radial displacement, stresses distribution along the thickness are achieved. The results of this work show that by increasing the order of temperature perturbation series the convergence at curves is occurred and also dimensionless radial stress decrease and other stresses with dimensionless radial displacement increase.

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