Probabilistic modeling and sizing of embedded flaws in ultrasonic nondestructive inspections for fatigue damage prognostics and structural integrity assessment
US9792555B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 16, 2013 |
| Grant date | Oct 17, 2017 |
| Priority date | — |
| Expiry date | Jun 20, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2291/0258
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for probabilistic fatigue life prediction using nondestructive testing data considering uncertainties from nondestructive examination (NDE) data and fatigue model parameters. The method utilizes uncertainty quantification models for detection, sizing, fatigue model parameters and inputs. A probability of detection model is developed based on a log-linear model coupling an actual flaw size with a nondestructive examination (NDE) reported size. A distribution of the actual flaw size is derived for both NDE data without flaw indications and NDE data with flaw indications by using probabilistic modeling and Bayes theorem. A turbine rotor example with real world NDE inspection data is presented to demonstrate the overall methodology.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.