Inverse reconstruction of fibre orientation in multilayer CFRP using forward FEM and eddy current pulsed thermography

This paper introduces the theory of eddy current pulsed thermography and expounds the research status of eddy current pulsed thermography in application and information extraction. Thermographic signal reconstruction, pulsed phase thermography, principal component analysis were introuduced in this paper and listed some fusion multiple methods to acquire information from infrared image. At last, it summarizes research progress, existing problem and deelopment of eddy current pulsed thermography.

Download Full-text

Numerical analysis of correlation between fibre orientation and eddy current testing signals of carbon-fibre reinforced polymer composites

International Journal of Applied Electromagnetics and Mechanics ◽

10.3233/jae-2012-1468 ◽

2012 ◽

Vol 39 (1-4) ◽

pp. 251-259 ◽

Cited By ~ 11

Author(s):

Jun Cheng ◽

Jinhao Qiu ◽

Toshiyuki Takagi ◽

Tetsuya Uchimoto ◽

Ning Hu

Keyword(s):

Numerical Analysis ◽

Carbon Fibre ◽

Polymer Composites ◽

Eddy Current ◽

Fibre Orientation ◽

Eddy Current Testing ◽

Current Testing ◽

Reinforced Polymer ◽

Carbon Fibre Reinforced Polymer ◽

Fibre Reinforced Polymer

Download Full-text

Detection of Fatigue Microcrack Using Eddy Current Pulsed Thermography

Journal of Sensors ◽

10.1155/2021/6647939 ◽

2021 ◽

Vol 2021 ◽

pp. 1-8

Author(s):

Xiang Zhang ◽

Jianping Peng ◽

Luquan Du ◽

Jie Bai ◽

Lingfan Feng ◽

...

Keyword(s):

Principal Component Analysis ◽

Signal Processing ◽

Eddy Current ◽

Material Properties ◽

Principal Component ◽

Tucker Decomposition ◽

Pulsed Thermography ◽

Signal Processing Algorithms ◽

Microcrack Detection ◽

Processing Algorithms

Microcracks are a common metallic defect, resulting in degradation of material properties. In this paper, specimens with different fatigue microcracks were detected by eddy current pulsed thermography (ECPT). Signal processing algorithms were investigated to improve the detectability and sensitivity; principal component analysis (PCA) and Tucker decomposition were used to compare the performance of microcrack detection. It was found that both algorithms were highly adaptable. A thermal quotient was used to assess the temperature variation trend. Furthermore, the potential correspondence between crack closure and temperature change was investigated.

Download Full-text

An Integrated Approach With Innovative NDTS for Thermal Barrier Coating Assessment: Optical and Frequency Scanning Eddy Current Testing (F-SECT) Combination With Pulsed Thermography

Volume 2: Automotive Systems, Bioengineering and Biomedical Technology, Fluids Engineering, Maintenance Engineering and Non-Destructive Evaluation, and Nanotechnology ◽

10.1115/esda2006-95555 ◽

2006 ◽

Author(s):

Claudia Rinaldi ◽

Letizia de Maria ◽

Federico Cernuschi ◽

Giampiero Antonelli

Keyword(s):

Eddy Current ◽

Gas Turbines ◽

Current System ◽

Field Measurements ◽

Integrated Approach ◽

Ceramic Coatings ◽

Thermal Barrier ◽

Pulsed Thermography ◽

Damage Level ◽

The Right

The components of the hot gas path in gas turbines can survive to very high temperatures because they are protected by ceramic Thermal Barrier Coatings (TBC); the failure of such coatings can dramatically reduce the component life. A reliable assessment of the Coating integrity and/or an Incipient TBC Damage Detection can help both in optimising the inspection intervals and in finding the appropriate remedial actions. In this paper the potential of three different NDT techniques applicable to the metallo/ceramic coatings of hot parts are discussed in the light of both results obtained on laboratory aged specimens and in field measurements on operated components. An investigation of the NDTs capability to detect damage evolution was performed on thermal-cycled specimens coated with TBC (both EB-PVD and pseudocolumnar APS) by means of an F-SECT eddy current system, by an innovative portable Piezospectroscopic system and by pulsed thermography. The observation of metallographic sections of the thermal cycled specimens allowed to give the right interpretation to the results of each NDT methodology and enlightened its specific characteristics and potentiality. Moreover in field applicability is discussed for each technique. Finally it is shown how an integrated approach of suitable coating evolution models and complimentary NDT techniques can provide an interesting assessment of the damage level of the metallo/ceramic coatings of operated rotating blades.

Download Full-text