In this report we present the results of the analysis and experimental study of defect detection with Laser Doppler Vibrometry (LDV). The Non-Destructive Inspection (NDI) procedure is based on the vibrational mode evaluation for a test-object with specified defect parameters. To evaluate the procedure a clamped aluminum drum with radius R was selected as the test-object. The introduced defect was a thickness loss of 2.5%, 5.0% and 7.5% at the central part of the drum. The data from computational examination, based on finite element analysis, are compared with experimental data. Additionally, we present data from interrogation of a multilayer (carbon composite) element with preset defects in a specific layer and examples of corrosion detection. The experiments show that the proposed technique enables reliable defect detection, location, and quantification.
Opto-acoustical sensor to examine the structural integrity of complex systems
2002-01-01
1525769 byte
Conference paper
Electronic Resource
English
11.0302 Opto-Acoustical Sensor to Examine the Structural Integrity of Complex Systems
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