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Activity Number:
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282
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Type:
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Topic Contributed
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Date/Time:
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Tuesday, July 31, 2007 : 10:30 AM to 12:20 PM
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Sponsor:
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Section on Physical and Engineering Sciences
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| Abstract - #309991 |
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Title:
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Estimating the Probability of Detecting Cracks in Aerospace Structures Using Nondestructive Inspections
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Author(s):
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Peter Hovey*+
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Companies:
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University of Dayton
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Address:
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300 College Park Dr, Dayton, OH, 45415,
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Keywords:
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estimation ; fatigue ; aerospace ; NDI
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Abstract:
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Nondestructive Inspections are used extensively in the Aerospace industry to look for cracks in structures that would not be readily apparent from a visual inspection. Future maintenance is planned based on the sizes of cracks that may be missed during an inspection. The probability of detecting (POD) cracks as a function of crack size is used as the gauge of the likelihood of a large crack remaining in the structure. Estimating the POD function poses a unique statistical challenge because there are many environmental factors that impact the POD that cannot be duplicated in a planned study designed to estimate the POD function. Several approaches that have been used in the past will be presented and some of the current efforts to provide better estimates will be described.
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