Model-based POD study of manual ultrasound inspection and sensitivity analysis using metamodel

Abstract : The reliability of NDE can be quantified by using the Probability of Detection (POD) approach. Former studies have shown the potential of the model-assisted POD (MAPOD) approach to replace expensive experimental determination of POD curves. In this paper, we make use of CIVA software to determine POD curves for a manual ultrasonic inspection of a heavy component, for which a whole experimental POD campaign was not available. The influential parameters were determined by expert analysis. The semi-analytical models used in CIVA for wave propagation and beam-defect interaction have been validated in the range of variation of the influential parameters by comparison with finite element modelling (Athena). The POD curves are computed for « hit/miss » and « â versus a » analysis. The verification of Berens hypothesis is evaluated by statistical tools. A sensitivity study is performed to measure the relative influence of parameters on the defect response amplitude variance, using the Sobol sensitivity index. A meta-model is also built to reduce computing cost and enhance the precision of estimated index.
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Conference papers
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Submitted on : Monday, June 11, 2018 - 8:03:59 AM
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G. Ribay, X. Artusi, F. Jenson, C. Reece, P.-E. Lhuillier. Model-based POD study of manual ultrasound inspection and sensitivity analysis using metamodel. 42nd annual review of progress in quantitative nondestructive evaluation: Incorporating the 6th European-American Workshop on Reliability of NDE, Jul 2015, Minneapolis, United States. ⟨10.1063/1.4940650⟩. ⟨cea-01811897⟩

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