By the current research the first stage rotor blade of a two-stage gas turbine has been analyzed and by using several different speeds ranging from 7500 to 11500, stress analysis and finding the best speed and less stress. The finite element method (FEM) has now become a very important agent of engineering analysis. Its truth is reflected in its popularity between engineers and designers pertinence to nearly all the engineering majors. AUTOCAD software is used to model it. analysis is performed by ANSYS14.5 software. The ANSYS program was used14.5 to find the stresses raised on the gas turbine blades by cutting the blade into 11 slides and a distance between one slice and another (9.536mm), and then it was subjected to five different speeds and calculated the stress values and the values confirmed that the best speed with the least effective stress is 7500r.p.m.

Blades may be considered to be the heart of turbine without blade there would be no power and the slightest fault in blade would mean a reduction in efficiency and costly repairs. The centrifugal force is one of the problems faced by the designer of blades especially at the first stages. The designer aims at reducing the stresses with in the allowed limit. The ANSYS 15 software was used as far as it is the most effective in analyzing the different numerous cases of stresses, the blades with limited root in all direction (X,Y,Z) were taken into consideration . The centrifugal forces were applied on the rotor blades at running speed of 6000 r.p.m., The finite element models of the blade were constructed using D3-10-noded Tetrahedron elements shape, SOLID 187, mesh of the entire blade 23406 Node,136575element. The average of normal stress, Von misses, Maximum principle stress, Minimum principle stress were calculated according to ANSYS 15 program, these stresses are as the result of the effect of centrifugal force for all planes along the blades and then values of stresses were compared to the curves for each alloy.The current research concluded that the Titanium alloy is the best alloy used in terms of reducing stresses due to centrifugal force, that is because density of Titanium alloy used is less than that of other used alloys, leading a reduction in centrifugal forcess that are directly proportional to mass. (PDF) Theoretical Stress Analysis of Gas Turbine Blade Made From Different Alloys. Available from: https://www.researchgate.net/publication/337193211_Theoretical_Stress_Analysis_of_Gas_Turbine_Blade_Made_From_Different_Alloys [accessed Oct 11 2020].