Although historically nondestructive techniques have been used almost exclusively for detection of macroscopic defects in structures, yet in aerospace, research has increasingly shown that it is practical to expand the role of nondestructive evaluation to include all phases of materials production. In aerospace both accredited and nonaccredited NDT Methods are used. Commonly used accredited NDT methods in aerospace are Visual Testing (UT), Liquid Penetrant Testing (PT), Magnetic Particle Testing (MT), Eddy Current Testing (ET), Ultrasonic Testing (UT), Radiography Testing (RT) and Leak Testing (LT). Some of the advanced non-accredited NDT techniques used in aerospace are ultrasonic phase array, optical holography, X-ray computed tomography, X-ray Diffraction Imaging and infrared thermography. Generally, 90% Probability of Detection (POD) criteria may be used for selection of an NDT Technique. Detectable size of the defect that an NDT method should detect can be estimated by the use of fracture mechanics. And based on this, the required NDT method may be decided. Defectology, Defect Analysis and the needed knowledge of Nondestructive Testing is used for controlling the defects in Aerospace Systems. Defect Mitigation Plan consists of corrective and preventive actions. Based on this information corrective and preventive actions may be implemented. Corrective actions consist of repair and salvage actions. And preventive actions ensure that the defects are not repeated.
Defect analysis in aerospace systems using non-destructive testing
Fehleranalyse in Raumfahrtkomponenten mittel zerstörungsfreier Prüfung
2006
10 Seiten
Aufsatz (Konferenz)
Englisch
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