Stress Analysis of FGM Rotating Disk Subjected to Mechanical and Thermal Loads in Aircraft Gas Turbine Engine

Document Type: Research Paper

Authors

1 Department of Mechanical Engineering, Malek Ashtar University of Technology, P.O.B. 84145-115, Iran

2 Department of Mechanical Engineering, Malek Ashtar University of Technology, Isfahan, Iran

Abstract

According to high usages of rotating disk in aircraft gas turbine engine, turbo pumps in oil and gas industries, steam and gas turbines in power plants, marine gas turbine and other industrial rotary machines designing and getting under the mechanical and thermal loading made this design and analysis to be as a special significance. These disks are subjected to mechanical and thermal loads. In this study, four methods, variable material properties (VMP), Galerkin, Runge-Kutta with two different rules calculate the amount of displacement, stress and strain of a rotary disk which has been used from a functional graded material (FGM). The problem in different states of loading and temperature dependence and independence of the properties has been resolved. Disk properties with the specified function of radius change. Mechanical loading conditions result from the centrifugal disk and blades mounted on it and the effects of shaft pressure and thermal stress caused by temperature difference in the shaft. The results obtained from each of the four methods are closed together and can be used to analyse the problems of this type. By Combining all loads the most radial stresses and environmental stresses respectively obtained in the center of the inner and outer radius and inner radius of the disk. By using the results can get most optimal design of the (FGM) disk.

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