Nonlinear Finite Element Analysis of Thermoelastic Stresses of FGM Rotating Disk Considering Temperature-Dependency of Material Properties

Journal of Simulation and Analysis of Novel Technologies in Mechanical Engineering

مقاله 6، دوره 1، شماره 2، آذر 2008، صفحه 51-58   

نوع مقاله: Persian

نویسندگان

Mehrnoosh Damircheli^{* 1}؛ Mohammad Azadi²

¹Ph.D Student of mechanical engineering, Islamic Azad University, Science and Technology branch

²Ph.D Student of mechanical engineering, Sharif University of Technology

چکیده

In the present paper, nonlinear radial and hoop thermoelastic stresses analysis of a disk made of FGMs material is investigated. According to this purpose, finite element method is used. In the present method, second-order one-dimensional element (with three node points) is proposed. The geometrical and stress boundary conditions are defined in the state of non-existence of external pressure and then zero radial stress in the outer layer of the disk, and zero displacement in the center of the disk. Also the temperature distribution is assumed as linear. The material properties changes including temperature-dependency are modeled. Finally, a numerical example is proposed to show the radial displacements, radial and hoop thermoelastic stresses versus radius of the disk for different power (N) from Power-law and different angular velocities. The results show that by increasing both two parameters, N and angular velocity of the disk, the amounts of displacement and stress are increased. At last, temperature-dependency and temperature-independency of material properties is investigated.

کلیدواژه‌ها

Rotating disk؛ Finite Element Method؛ FGM؛ Thermoelastic stress؛ Temperature-dependency؛ nonlinear analysis

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