Fatigue analysis of rolled components considering transient cyclic material behaviour and residual stresses

2018 ◽  
Vol 13 (2) ◽  
pp. 189-200 ◽  
Author(s):  
David Kühne ◽  
Christina Guilleaume ◽  
Martha Seiler ◽  
Peter Hantschke ◽  
Franz Ellmer ◽  
...  
Keyword(s):  
Residual Stresses ◽  
Fatigue Analysis ◽  
Material Behaviour

scholarly journals Numerical and Experimental Assessment of the Effect of Residual Stresses on the Fatigue Strength of an Aircraft Blade

2021 ◽  
Author(s):  
Arkadiusz Bednarz ◽  
Wojciech Z. Misiolek
Keyword(s):  
Residual Stresses ◽  
Practical Importance ◽  
Cyclic Hardening ◽  
Fatigue Analysis ◽  
Compressor Blade ◽  
Point Of View ◽  
Initial Stresses ◽  
Aviation Industry ◽  
Turbine Engine ◽  
Engine Maintenance

The work presents the results of numerical fatigue analysis of a turbine engine compressor blade, taking into account the values of initial stresses resulting from surface treatment - shot-peening. The values of the residual stresses were estimated experimentally using X-ray diffraction. The paper specifies the values of the residual stresses on both sides of the blade and their reduction due to the cutting through the blade - relaxation. The obtained values of the residual stresses were used as initial stresses in the numerical fatigue analysis of the damaged compressor blade, which is subjected to resonant vibrations of known amplitude. Numerical fatigue ε-N life analysis was based on the several fatigue material models: Manson’s, Mitchell’s, Baumel-Seeger’s, Muralidharan-Manson’s, Ong’s, Roessle-Fatemi’s and Median’s, and also on the three models of cyclic hardening: Manson’s, Xianxin’s, and Fatemi’s. Because of this approach, it was possible to determine the relationship between the selection of the fatigue material ε-N model and the cyclic hardening model on the results of the numerical fatigue analysis. Additionally, the calculated results were compared with the results of experimental research, which allowed for a substantive evaluation of the obtained results. These results are of great scientific and practical importance. The problem of determining the fatigue life of blades with defects operating under resonance vibrations is one of the original tasks in the field of fracture mechanics and experimental mechanics. The results obtained are of great importance in the aviation industry and can be used during engine maintenance and inspections to assess the suitability of blades with defects in terms of the needs of further work. This aspect of engineering maintenance is of great importance from the aircraft safety point of view.

Fatigue analysis of multipass welded joints considering residual stresses

2015 ◽  
Vol 79 ◽  
pp. 75-85 ◽  
Author(s):  
A. Lopez-Jauregi ◽  
J.A. Esnaola ◽  
I. Ulacia ◽  
I. Urrutibeascoa ◽  
A. Madariaga
Keyword(s):  
Residual Stresses ◽  
Welded Joints ◽  
Fatigue Analysis

scholarly journals Simulation-driven product development of cast components with allowance for process-induced material behaviour

2020 ◽  
Vol 7 (1) ◽  
pp. 78-85
Author(s):  
J Jansson ◽  
J Olofsson ◽  
K Salomonsson
Keyword(s):  
Residual Stresses ◽  
Finite Element Analyses ◽  
Material Behaviour ◽  
Large Magnitude ◽  
Strength Differential ◽  
Design Engineers ◽  
Process Simulations ◽  
Specific Material ◽  
And Performance ◽  
Complex Relationships

Abstract This paper presents a methodology that can be used to consider local variations in thermomechanical and thermophysical material properties, residual stresses, and strength-differential effects in finite element analyses of cast components. The methodology is based on applying process simulations and structural analyses together with experimentally established, or already available literature data, in order to describe element-specific material variations. A cast-iron cylinder head was used in order to evaluate the influence of several simplifications that are commonly performed in computer aided engineering. It is shown that non-trivial errors of a potentially large magnitude are introduced by not considering residual stresses, compressive behaviour, temperature dependence, and process-induced material property variations. By providing design engineers with tools that allow them to consider the complex relationships between these aspects early in the development phase, cast components have the potential to be further optimized with respect to both weight and performance.

An Analysis of the Effects of Burnishing in Internal Broaching

2000 ◽  
Vol 28 (2) ◽  
pp. 163-173 ◽  
Author(s):  
V. Sajeev ◽  
L. Vijayaraghavan ◽  
U. R. K. Rao
Keyword(s):  
Finite Element ◽  
Residual Stresses ◽  
Material Behaviour ◽  
Element Analysis ◽  
Finite Element Program ◽  
Left Behind ◽  
The Finite Element Analysis ◽  
Non Linear ◽  
Element Program ◽  
Linear Material

The finite element analysis gives the stresses and deflections of the broach and workpiece while cutting and burnishing. This has been achieved by developing a suitable finite element program for solving linear and non-linear material behaviour problems. The broach has been considered to behave elastically. In case of burnishing, the stresses on the workpiece result in yielding, and hence, non-linear material behaviour is considered for the workpiece. The program has been further modified to compute residual stresses on the broached component. The movement of a single burnishing tooth through the workpiece is simulated in a step-by-step manner, leading to residual stresses on the broached surface. The burnishing tooth and corresponding portion of the workpiece are modelled using FEM. The effect of tool-work interference and the ratio of radial to axial force on the stresses and deflections while burnishing have been studied. The residual stresses left behind on the broached component have been analytically evaluated.

scholarly journals Rolling contact fatigue analysis of rails under the influence of residual stresses induced by manufacturing

2018 ◽  
Vol 0 (0) ◽  
pp. 0-0 ◽  
Author(s):  
Reza Masoudi Nejad ◽  
Mahmoud Shariati ◽  
Khalil Farhangdoost ◽  
Amir Atrian
Keyword(s):  
Residual Stresses ◽  
Rolling Contact Fatigue ◽  
Contact Fatigue ◽  
Fatigue Analysis ◽  
Rolling Contact

scholarly journals Numerical and Experimental Assessment of the Effect of Residual Stresses on the Fatigue Strength of an Aircraft Blade

Materials ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5279
Author(s):  
Arkadiusz Bednarz ◽  
Wojciech Zbigniew Misiolek
Keyword(s):  
Residual Stresses ◽  
Practical Importance ◽  
Cyclic Hardening ◽  
Fatigue Analysis ◽  
Compressor Blade ◽  
Point Of View ◽  
Initial Stresses ◽  
Aviation Industry ◽  
Turbine Engine ◽  
Engine Maintenance

The work presents the results of numerical fatigue analysis of a turbine engine compressor blade, taking into account the values of initial stresses resulting from surface treatment-shot-peening. The values of the residual stresses were estimated experimentally using X-ray diffraction. The paper specifies the values of the residual stresses on both sides of the blade and their reduction due to cutting through the blade-relaxation. The obtained values of the residual stresses were used as initial stresses in the numerical fatigue analysis of the damaged compressor blade, which was subjected to resonant vibrations of known amplitude. Numerical fatigue ε-N life analysis was based on several fatigue material models: Manson’s, Mitchell’s, Baumel-Seeger’s, Muralidharan-Manson’s, Ong’s, Roessle-Fatemi’s, and Median’s, and also on the three models of cyclic hardening: Manson’s, Xianxin’s, and Fatemi’s. Because of this approach, it was possible to determine the relationship between the selection of the fatigue material ε-N model and the cyclic hardening model on the results of the numerical fatigue analysis. Additionally, the calculated results were compared with the results of experimental research, which allowed for a substantive evaluation of the obtained results. These results are of great scientific and practical importance. The problem of determining the fatigue life of blades with defects operating under resonance vibrations is one of the original tasks in the field of fracture mechanics and experimental mechanics. The results obtained are of great importance in the aviation industry and can be used during engine maintenance and inspections to assess the suitability of blades with defects in terms of the needs of further work. This aspect of engineering maintenance is of great importance from the aircraft safety point of view.

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