Simulation-Based Investigation of a Probability of Detection (POD) Model Using Phased Array Ultrasonic Testing (PAUT) Technique

Abstract Probability of detection (POD) as a metric for quantifying the capability inspection procedures in nondestructive evaluation (NDE), has been applied and evolved industries since 1970s. Progress had noted when certain statistical functions were brought up to model POD behavior, including log-normal (also referred Probit model). This concluded be best fit therefore widely used many studies, while involved assumptions conditions not carefully addressed explored. To make flexible datasets available specific reduce number expensive experiments needed, model-assisted (MAPOD) is an alternative. paper addresses pure simulation-based procedure scenario involving phased array ultrasonic testing (PAUT) on lack-of-fusion defects additive manufactured (AM) components. The mathematical simulations are performed by (UT) simulation software, simSUNDT, developed at Chalmers University Technology Sweden. Resulted with proposed data processing steps evaluated terms model, purpose discussing validity under different circumstances. Simulation-based curves finally compared several discrete values some defect sizes, calculated through massive computations from physics-model based metamodel. Comparisons observations confirm satisfactory application despite violations hypotheses.