Development of NDE Technique with Induction Heating and Thermography on Conductive Composite Materials
Abstract
The ultimate assessment of feasibility was determined in the final task; however, the tasks preceding it were required in order to construct an optimized test system. Our expectation at the outset of the projects was that the combination of induction heating and thermography would outperform systems based exclusively on either electromagnetic induction or thermography. The rationale was that the combined system would offer better capabilities for wide area inspection of large structures than induction systems, and better sensitivity to deep, low aspect ratio indications than pulsed thermography. Ultimately, the results of the experiments in Task 4 did not entirely support our initial optimism. Although the proof-of-principal system did offer the anticipated advantages for side area inspection, the sensitivity of the system did not exceed that of current pulsed thermography capabilities, and in fact, did not perform as well in some key respects. Although some aspects of the performance of the SIT system could perhaps be attributed to shortcomings in the design or construction of this first demonstration unit, analysis of the data indicates that some important limitations of the approach are fundamental.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 2004
- Accession Number
- ADA430331
Entities
People
- Heejune Kim
- James R. Lhota
- Shridhar Yarlagadda
- Steven M. Shepard
- Tasdiq Ahmed