Evaluation of Emerging Non-Destructive Inspection Techniques to Characterize Damage Beneath Polymeric Tiles on VICTORIA Class Submarine Hulls


  1. Owens, J.
Corporate Authors
Defence Research and Development Canada, Atlantic Research Centre, Halifax NS (CAN);OWENS AEROSPACE INC, MONCTON NB (CAN)
This report summarizes the basic study conducted by Owens Aerospace Inc on emerging non-destructive inspection (NDI) technologies for submarine hull inspections. The report identifies the various technologies that were considered. It also outlines the rationale for selecting or eliminating the various technologies from further evaluation. Pulsed Eddy Current was identified as the main technology to undergo a detailed evaluated under the present contract. This technology was formally tested at the DRDC Atlantic Dockyard Laboratory in Halifax Nova Scotia Canada. Tests were conducted on simulated test panels (mock-ups) which were meant to represent the hull of an actual Victoria Class submarine. The samples were made of the same parent material and of a similar geometry to actual submarine hulls. Artificial simulated defects were embedded in the steel face of these panels. The defects were covered over with 30 mm thick solid rubber tiles which were bonded to the steel surface to represent actual submarine acoustic/anechoic tiles. The test data collected consisted thickness readings which were as determined using the RTD Quality Services “INCO-Test” Pulsed Eddy Current Technology. The results of these tests are reported in Section 5 in the RTD test report and they are also discussed in detail and presented as contour plots in the main body of the report. An assessment of the RTD INCO-Test is included at the end of the report which outlines the applicability of the technology.
Report Number
DRDC-RDDC-2014-C42 — Contract Report
Date of publication
01 May 2014
Number of Pages
Electronic Document(PDF)

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