Accession Number:

ADA114467

Title:

Evaluation of NDE Reliability Characterization. Volume I

Descriptive Note:

Final rept. Jul 80-Aug 81

Corporate Author:

DAYTON UNIV OH RESEARCH INST

Personal Author(s):

• Berens, Alan P.
• Hovey, Peter W.

Report Date:

1981-12-01

Pagination or Media Count:

98.0

Abstract:

To characterize the uncertainty in non-destructive evaluation NDE, a probability of crack detection POD as a function of crack length is postulated where POD is defined as the proportion of cracks of a given length that would be detected by the NDE technique when applied by inspectors to structural elements in a defined environment. This report 1 presents a statistical framework for describing the uncertainty in the NDE determinations and 2 evaluated various characterizations of NDE reliability. The data from a recent Air Force study on NDE reliability estimate the parameters of the NDE model. For these representative capabilities NDE reliability experiments are simulated. Different NDE capability characterizations are computed for each simulated experiment and are statistically compared. Author

Descriptors:

• *NONDESTRUCTIVE TESTING
• *CRACKS
• *RELIABILITY
• *CRACK PROPAGATION
• *STATISTICAL ANALYSIS
• TEST AND EVALUATION
• DETECTION
• SIZES(DIMENSIONS)
• LENGTH
• INSPECTION
• CLASSIFICATION
• FATIGUE(MECHANICS)
• DETERMINANTS(MATHEMATICS)

Subject Categories:

• Statistics and Probability
• Test Facilities, Equipment and Methods
• Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE