scholarly journals A Novel Method for High Temperature Fatigue Testing of Nickel Superalloy Turbine Blades with Additional NDT Diagnostics

Materials ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1392
Author(s):  
Dominik Kukla ◽  
Mateusz Kopec ◽  
Ryszard Sitek ◽  
Aleksander Olejnik ◽  
Stanisław Kachel ◽  
...  
Keyword(s):  
Finite Element ◽  
High Temperature ◽  
Fatigue Testing ◽  
Turbine Blades ◽  
Nickel Superalloy ◽  
Fe Model ◽  
Destructive Testing ◽  
High Temperature Fatigue ◽  
Bending Load ◽  
Novel Method

In this paper, a novel method for high temperature fatigue strength assessment of nickel superalloy turbine blades after operation at different times (303 and 473 h) was presented. The studies included destructive testing (fatigue testing at temperature 950 °C under cyclic bending load), non-destructive testing (Fluorescent Penetrant Inspection and Eddy Current method), and finite element modelling. High temperature fatigue tests were performed within load range from 5200 to 6600 N using a special self-designed blade grip attached to the conventional testing machine. The experimental results were compared with the finite element model generated from the ANSYS software. It was found that failure of turbine blades occurred in the area with the highest stress concertation, which was accurately predicted by the finite element (FE) model.

scholarly journals High temperature fatigue testing of gas turbine blades

2017 ◽  
Vol 7 ◽  
pp. 206-213 ◽  
Author(s):  
M. Beghini ◽  
L. Bertini ◽  
C. Santus ◽  
B.D. Monelli ◽  
E. Scrinzi ◽  
...  
Keyword(s):  
High Temperature ◽  
Gas Turbine ◽  
Fatigue Testing ◽  
Turbine Blades ◽  
Gas Turbine Blades ◽  
High Temperature Fatigue

Finite Element Modelling of Static and Fatigue Failure of Composite Repair System in Offshore Pipe Risers

2014 ◽  
Vol 875-877 ◽  
pp. 1063-1068 ◽  
Author(s):  
Park Hinn Chan ◽  
Kim Yeow Tshai ◽  
Michael Johnson ◽  
Hui Leng Choo
Keyword(s):  
Finite Element ◽  
Internal Pressure ◽  
Low Cycle Fatigue ◽  
Failure Mechanisms ◽  
Repair System ◽  
Fe Model ◽  
Composite Surface ◽  
Composite Repair ◽  
Bending Load ◽  
Static Conditions

The static and cyclic failure mechanisms of offshore pipe riser repaired with a designated laminate orientation of carbon/epoxy (C/E) system were studied. The finite element (FE) model takes into account failure mechanisms of the composite sleeve inter-layer delamination, debonding at the steel riser-composite surface interface, and the maximum permissible strain of the repaired riser. Design conditions of the combined static loads (coupled internal pressure, longitudinal tensile and transverse bending) were determined through a limit state analysis [1,2]. The limiting static bending load that causes catastrophic failure under a coupled internal pressure and tensile loadings was determined through Virtual Crack Closure Technique (VCCT). The effects of cyclic bending, mimicking the typical scenarios experienced in pipe riser exposed to dynamic subsea environment, were evaluated and compared against the static conditions. The low cycle fatigue of the composite repair system (CRS) is simulated using a direct cyclic analysis within a general purpose FE program, where the onset and fatigue delamination/disbonding growth are characterized through the Paris Law.

Finite Element Analysis of Temperature Characteristicon the Pressure Sensor Based on the Shell of Piezo Gauge

2010 ◽  
Vol 156-157 ◽  
pp. 117-122
Author(s):  
Xin E. Li ◽  
Jing Zu ◽  
Peng Xu
Keyword(s):  
Finite Element ◽  
High Temperature ◽  
Thermal Barrier Coating ◽  
Temperature Stability ◽  
Chamber Pressure ◽  
Thermal Barrier ◽  
Element Analysis ◽  
Temperature Characteristics ◽  
Barrier Coating ◽  
Novel Method

When the gun chamber pressure is tested, its instantaneous high temperature up to 3000 , Sensor directly touches the high temperature gas. According to this special use environment, A novel method is proposed in this paper: the thermal barrier coating (TBC) is added to protect the sensor against its thermal deformity. And temperature characteristics of the sensor with TBC are analyzed through finite element. finally, its temperature characteristics were experimentally tested. Results show that the thermal barrier coating plaied heat insulation role, temperature stability of the sensor is good.

The Application of Aeroelastic Analysis Output Load Distributions to Finite Element Models of Wind

2005 ◽  
Vol 29 (2) ◽  
pp. 153-168 ◽  
Author(s):  
Timothy J. Knill
Keyword(s):  
Finite Element ◽  
Wind Turbine ◽  
Turbine Blades ◽  
Fe Model ◽  
Wind Turbine Blades ◽  
Fe Modelling ◽  
Load Distributions ◽  
Aeroelastic Analysis ◽  
Extreme Load ◽  
Application Techniques

The structural design of wind turbine blades is a rapidly evolving technology. Finite element (FE) modelling is used extensively by structural designers to assess the behaviour of wind turbine blades under operational and extreme load conditions. This paper develops a method of transferring aerodynamic and inertial loads from the aeroelastic analysis output to the FE model. Once a procedure is developed and verified, case studies are undertaken using an FE model of a 34m blade. Loads are applied using the newly developed method and various FE analysis results compared to the same blade analysed under more traditional load application techniques. The case study clearly demonstrates that the method of applying loads can influence some types of analysis results significantly.

Apparatus for the high-temperature fatigue testing of samples subjected to axial loading

1974 ◽  
Vol 10 (5) ◽  
pp. 529-533 ◽  
Author(s):  
M. �. Garf ◽  
I. I. Ishchenko ◽  
�. Ya. Filatov ◽  
V. �. Pavlovskii ◽  
V. N. Belokurov ◽  
...  
Keyword(s):  
High Temperature ◽  
Fatigue Testing ◽  
Axial Loading ◽  
High Temperature Fatigue
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