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Added Value of THz NDT for Aeronautics

Added Value of THz NDT for Aeronautics. Conclusions of THz NDT potential related materials /structures /defects (1). Conclusions of THz NDT potential related materials /structures /defects (2). Compared to the conventional NDT techniques tested:

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Added Value of THz NDT for Aeronautics

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  1. Added Value of THz NDT for Aeronautics 2nd ITFG Workshop

  2. Conclusions of THz NDT potential related materials /structures /defects (1)

  3. Conclusions of THz NDT potential related materials /structures /defects (2) • Compared to the conventional NDT techniques tested: • Outperforms other NDT methods for the inspection of coating misprocesses only TD • Clearly overcomes the UT inspection difficulties (methods on-site) for C-sandwich structures with foam or H/C core FMCW • Equal / similar detection level to IRT, X-RAY and some of the UT methods performed, for A-sandwich foam or H/C core FMCW & TD • Comparable results to UT for Fiberglass Solid Laminate inspections • FMCW & TD • Capability inspection of complex objects shapes (radome) FMCW & TD

  4. Overall performance of the NDT THz systems (objectives achieved by the DOTNAC project) • Demonstrated THz effectiveness as a NDT tool (parts made of FGRP). • Development of a non-contact and a non-invasive NDT THz system (assessing composite part condition in service & total absence of health risks). • Full integration of signal processing techniques (reflection-mode tomosynthesis or synthetic aperture processing) in order to enable better detection level. • Good trade-off: penetration capacity vsresolution performance • easily between • 1cm to 3cm • Spatial resolution > 1mm • Depth resolution > 2mm • FMCW THz • Spatial resolution > 1mm • Depth resolution > 20µm • TD THz • cannot exceed 1cm

  5. Overall performance of the NDT THz systems (objectives achieved by the DOTNAC project) • Demonstrated THz effectiveness as a NDT tool (parts made of FGRP). • Development of a non-contact and a non-invasive NDT THz system (assessing composite part condition in service & total absence of health risks). • Full integration of signal processing techniques (reflection-mode tomosynthesis or synthetic aperture processing) in order to enable better detection level. • Good trade-off: penetration capacity vs resolution performance • Scanning of objects presenting 3-D symmetry (5-Axis Motion platform allows fast data acquisition about 1.000 measurements/s of THz sensors).

  6. Industrial Capacity and Industrial Feasability of the NDT THz systems • “On-aircraft” THz system, • Flexible inspections of suspicious parts (separate or mounted) by a 2-D handled system. • Portable and compact sensor for uses in service or maintenance operations. • “In-workshop” THz system, • A 3-D scanner system to handle “free-form” objects. • Custom-made solutions for its integration in productions lines. • NDT data fusion of THz systems with other conventional NDT techniques, • To complement their capability for defects detection. • Obtaining a flexible NDT tool applicable to a wide range of aeronautic materials.

  7. Added Value of THz NDT for Aeronautics QUESTIONS?

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