Issue << content << Thermal Inspection of Aircraft Multilayer Nose Fairing


DOI: 10.12737/21149

2016. Vol.19. No. 3, pp. 13-16

Thermal Inspection of Aircraft Multilayer Nose Fairing

A. V. Popov, I. A. Chizhov, N. P. Zaets

Introduction. Multilayer structures have a high stiffness with low weight. The rigidity of the structures can be preserved only under condition of their integrity preservation. To identify emerging defects, there are different non-destructive testing methods and means. Increased use of composite materials leads to the development of new technologies for their inspection. The thermal inspection is a method preferred for defect detection in multilayer structures.
Method. The article presents a study on application of thermal method for testing of composite multilayer structures to enhance the testing efficiency. Using a mathematical model of thermal testing, the theoretical studies of defect detection possibility (POD) were carried out on the basis of temperature fields’ analysis. The values of varied factors, which provide the best detection of defects, were determined. The results of mathematical modelling served as a basis for the experimental research to determine the capabilities of the thermal method to detect defects.
Results. The experimental results were used to develop the inspection technique and hardware for defective areas identifying in the aircraft fairings. The developed technique helped to increase the reliability of the air fairing testing by 7% and efficiency by 40% (for labour costs).
 
Key words: technical condition, multilayer element,  aircraft construction, border of the defect, temperature contrast
References
  1. Krysin V. N. Sloistye kleenye konstruktsii v samoletostroenii [Layered laminated structures in aircraft]. Moscow, Mashinostroenie, 1990, 228 p. (in Russ.).
  2. Klyuev V. V. Nerazrushayushchiy kontrol i diagnostika [Nondestructive testing and diagnostics]. Moscow, Mashinostroenie, 2003, 657 p. (in Russ.).
  3. Vavilov V. P. Infrakrasnaya termografiya i teplovoy kontrol [Infrared thermography and thermal inspection]. Moscow, ID Spektr, 2013, 544 p. (in Russ.).
  4. Budadin O. N., Vavilov V. P., Abramova E. V. Teplovoy kontrol [Thermal inspection]. Moscow, ID Spektr, 2013, 176 p. (in Russ.).
  5. Barynin V. A., Budadin O. N., Kul’kov A. A. Sovremennye tekhnologii nerazrushayushchego kontrolya konstruktsiy iz polimernykh kompozitsionnykh materialov [Modern non-destructive testing technologies for polymer composite structures]. Moscow, ID Spektr, 2013, 243 p. (in Russ.).
  6. Chizhov I. A., Zaets N. P., Bogomolov D. V. Modelirovanie protsessa teploprovodnosti v mnogosloynykh konstruktsiyakh [Modeling of thermal conductivity process in multilayer structures]. In: Vserossiyskaya ezhegodnaya nauchnaya konferentsiya “Aktualnye problemy vooruzhennoy borby v vozdushno kosmicheskoy sfere” [Proc. of Conf. “Topical problems of the armed struggle in the aerospace field”]. Voronezh, April 9-10, 2015, pp. 187–191 (in Russ.).
 
published
NDT in Mining Industry

MAIN FEATURE:
NDT in Mining Industry

CONTACTS

5 Udelny Pr.
St. Petersburg
007 812 670 7609
007 812 670 7611


NDT World, Russian Quarterty Journal
©2000-2016 All rights reserved