Nondestructive Testing-with emphasis on corrosion damage detection

To guarantee the safety and reliability of aircraft structures, Lamb wave based structural health monitoring has been widely used in recent years. However, there are several factors that severely restrict its practical application, such as dispersion effect and complex boundary reflection. The overlap and deformation in wave packets make it difficult to extract the damage characteristics from the complex Lamb wave signals. To tackle this problem, a latent variable model based wave packet separation method is developed in this paper. Aimed at corrosion damage detection, several damage indices are investigated experimentally. By choosing the most sensitive damage index, the validity and the accuracy of the proposed method in corrosion damage detection are demonstrated through the corrosion experiments.

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Corrosion damage detection with piezoelectric wafer active sensors

10.1117/12.541152 ◽

2004 ◽

Cited By ~ 9

Author(s):

Dustin T. Thomas ◽

John T. Welter ◽

Victor Giurgiutiu

Keyword(s):

Damage Detection ◽

Corrosion Damage ◽

Active Sensors ◽

Piezoelectric Wafer Active Sensors ◽

Piezoelectric Wafer

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Investigation of the Effectiveness of Different Thermographic Testing Modalities in Damage Detection

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.558.349 ◽

2013 ◽

Vol 558 ◽

pp. 349-356 ◽

Cited By ~ 1

Author(s):

Łukasz Pieczonka ◽

Mariusz Szwedo ◽

Tadeusz Uhl

Keyword(s):

Nondestructive Testing ◽

Comparative Study ◽

Damage Detection ◽

Composite Plate ◽

Impact Damage ◽

Experimental Testing ◽

Diagnostic System ◽

Software Components ◽

Pulsed Thermography

The paper deals with practical aspects of Thermographic Nondestructive Testing (TNDT). A comparative study of burst vibrothermography (VT) and pulsed thermography (PT) measurements is presented and discussed. The authors have developed a diagnostic system for thermographic testing of structures that was used to perform experiments. Supported test modalities include burst vibrothermography and pulsed thermography, among other techniques. The system comprises both hardware and software components facilitating TNDT inspections. Experimental testing has been performed, on a composite plate, using the developed diagnostic system and two of the supported test modalities. The goal of these investigations was to compare the performance of both TNDT methods in revealing Barely Visible Impact Damage (BVID) in a composite plate.

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