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Detection Reliability for Small Cracks Beneath Rivet Heads Using Eddy-Current211 Nondestructive Inspection Techniques

机译:利用涡流211无损检测技术检测铆头下方小裂纹的可靠性

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In order to assess the full potential of advanced eddy-current inspection211u001etechnology on representative aircraft applications, the FAA's Airworthiness 211u001eAssurance Nondestructive Inspection Validation Center (AANC) was tasked to assess 211u001ethe full capability of several advanced systems. The task involved inspections of 211u001eseveral rivet skin splices--representative of actual aircraft structure--211u001econtaining cracks ranging from 0.040-, 0.060-, and 0.080-inch standards, and 211u001ethresholds were set to the lowest reasonable level for the particular system. The 211u001eresults demonstrated that some of the systems were able to reliably detect cracks 211u001eas small as 0.040 inch with false call rates remained less than 1%.

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