Abstract: The Advanced Nondestructive Evaluation (NDE) Sensor Modeling for Multisite Inspection program has developed finite element models (FEM) of electromagnetic NDE for optimizing the inspection of aging aircraft structure. The program found excellent correlation between magnetic field strengths predicted by FEM analysis and experimental values in fastened airframe structure configurations. Applying the FEM analysis to magnetoresistive (MR) sensors inspection problems then provided useful insights into the many parameter effects associated with MR sensors, leading to optimized scanning predictions. The modeling and experimental analysis of the sensitivity of MR sensing for second layer cracks in thick (0.16 inch top layer) structure demonstrated improvements in signal to noise by over an order of magnitude compared the currently applied conventional eddy current method. This result provided a quantitative evaluation of the MR sensor inspection method and validated the significant improvements in inspection capability that can be achieved in the MR mobile automated ultrasonic scanner (MAUS) implementation program.
| Limitations: |
 APPROVED FOR PUBLIC RELEASE |
| Description: |
Final rept. 10 Feb 2006-19 Oct 2008 |
| Pages: |
167 |
| Report Date: |
Oct-2008 |
| Contract Number: |
FA8650-06-C-5210 FA865006C5210 |
| Report Number: |
A476694 |
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