The application of reverse geometry x-ray to the detection and characterization of corrosion in aircraft structures is presented. Reverse geometry x-ray is an unique system for real time radiographic imaging of a structure. This system has several possible advantages compared to conventional radiography. First, the x-ray detector can be miniaturized and easily positioned inside a complex structure (such as aircraft wings) enabling images of each surface of the structure to be obtained separately. Second, multiple detectors enable the simultaneous acquisition of data from several different perspectives without moving the structure or the measurement system. This provides a means for locating the position of flaws and enhances separation of features from the surface from features inside the structure. Data is presented on specimens fabricated to simulate corrosion in aircraft structures. The data from multiple detectors is demonstrated to be capable of separating surface features from corrosion in the lap joint and locating the corrosion in multilayer structures. A method is presented for calibration of the detectors to enable quantification of the corrosion to within 2%.
Imaging corrosion in aircraft structures with reverse geometry x-ray
1998
10 Seiten, 9 Quellen
Aufsatz (Konferenz)
Englisch
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