Numerical methods of investigating the stress-strain state and endurance of the disks of aircraft gas-turbine engines

1981 ◽  
Vol 13 (4) ◽  
pp. 454-461
Author(s):  
I. V. Dem'yanushko ◽  
Yu. M. Temis
Keyword(s):  
Numerical Methods ◽  
Gas Turbine ◽  
Strain State ◽  
Turbine Engines ◽  
Gas Turbine Engines ◽  
Stress Strain ◽  
Stress Strain State

scholarly journals GAS TURBINE ENGINES IMPELLERS FORCED VIBRATION AND STRESS-STRAIN STATE INVESTIGATION

2020 ◽  
Vol 1 (30) ◽  
pp. 195-203
Author(s):  
S. Morhun
Keyword(s):  
Mathematical Model ◽  
Gas Turbine ◽  
Forced Vibration ◽  
Gas Flow ◽  
Strain State ◽  
Turbine Engines ◽  
Gas Turbine Engines ◽  
Stress Strain ◽  
Turbine Engine ◽  
Stress Strain State

The method of the gas turbine engine impeller forced vibration and stress-strain state parameters calculation is given. Using the finite element method, a refined mathematical model was developed for the several types of impellers most widespread in the practice of gas turbine engines building. The developed mathematical model takes into consideration the impeller blades geometric parameters and the construction of blades connectors. The results of its forced vibration frequencies calculation, caused by the influence of non-stationary gas flow are given for different types of the blades connectors. The dependencies of the impeller blades stress-strain state from the value its feather geometric perameters have been studied too.  

scholarly journals Calculation of the stress – strain state of blades made of polymer composite materials of starting turboexpanders in resonance zones

2021 ◽  
Vol 102 (2) ◽  
pp. 45-53
Author(s):  
Yurii Nakonetchnyi ◽  
Ihor Yarema ◽  
Vitalii Batiuk
Keyword(s):  
Blast Furnace ◽  
Composite Materials ◽  
Gas Turbine ◽  
Polymer Composite ◽  
Strain State ◽  
Turbine Blades ◽  
Polymer Composite Materials ◽  
Turbine Engines ◽  
Gas Turbine Engines ◽  
Successful Operation

An overview of the successful application of modern composite materials for the manufacturing of turbine blades of aircraft gas turbine engines, axial mine and blast furnace compressors. Their main advantages of these materials in comparison with metal are analyzed. Analytical calculations of stresses arising in the material of plastic blades of starting turboexpanders are carried out. The possibility of successful application of glass-filled polyamide for the manufacturing of moving and guide blades of starting turboexpanders and their successful operation at compressor stations of main gas pipelines is substantiated.

Stress-Strain state of a turbofan rotor of an aircraft gas-turbine engine by the finite-element method

1983 ◽  
Vol 15 (2) ◽  
pp. 268-272
Author(s):  
V. G. Bazhenov ◽  
Yu. I. Trostenyuk ◽  
N. I. Glushchenko ◽  
N. B. Krishevskii ◽  
V. Ya. Krivoshei
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Gas Turbine ◽  
Strain State ◽  
Gas Turbine Engine ◽  
The Finite Element Method ◽  
Stress Strain ◽  
Turbine Engine ◽  
Stress Strain State ◽  
Aircraft Gas Turbine Engine

ANALYSIS OF THE KINETICS AND DIRECTIONALITY OF ELASTOPLASTIC DEFORMATION AND FRACTURE

2019 ◽  
Vol 85 (6) ◽  
pp. 47-52
Author(s):  
N. A. Makhutov ◽  
I. V. Makarenko ◽  
L. V. Makarenko
Keyword(s):  
Numerical Methods ◽  
Fracture Mechanics ◽  
Fracture Surface ◽  
Elastoplastic Deformation ◽  
Strain State ◽  
Stress Strain ◽  
Nonlinear Fracture Mechanics ◽  
Stress Strain State ◽  
Nonlinear Fracture ◽  
Cycle Loading

Safety, survivability, and serviceability of the equipment are governed by the strength characteristics of the separate units and elements which can contain initial or operational defects such as superficial differently oriented semi-elliptical cracks. Numerical methods of calculation provide a large bulk of information about the stress-strain state (SSS) of those elements proceeding from the given algorithms for calculating the corresponding fracture models. Change in the type of the SSS near the crack contour when going from the bulk to the surface depends on the constraint of deformations along their front, i.e., on the 3D character of the SSS. Diagnostics of the form change of the defects (surface differently oriented semi-elliptic low-cycle cracks) is carried out on the basis of experimental results and numerical solutions. The data of the finite element modeling are implemented on the basis of macros of the ANSYS program complex. The regularity of the directionality of developing the elastoplastic fracture under low-cycle loading is studied. The proposed methodology is proved by the parametric equations of the kinetics of forming changes of the cracks under study in the fractographic analysis of the surfaces of their development. The results of testing samples with semi-elliptic cracks under low-cycle loading are used in analysis of the parameters of the morphology of the surfaces of the developed defects. The results of measuring fields of elastoplastic deformation intensity in the crack tip and geometrical characteristics of the fracture surface development are presented. Analysis of the dynamics of the local stress-strain state near the contour of multi-oriented defects in parts and structural units of the equipment showed a good agreement between the experimental parameters of the geometry of developing cracks and characteristics obtained by numerical methods. The presented parametric equations specify the characteristics of nonlinear fracture mechanics thus providing reliable estimation and forecasting of survivability, and safety of serviceability of the critical equipment. The deformation criteria of nonlinear fracture mechanics are used to demonstrate the dependence of fracture development on the 3D character of the stress-strain state indicating to the directionality of the geometric development of the fracture surface form.

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