DETECTION OF HONEYCOMB DAMAGE USING HEXAGONAL GRID DISCONTINUITIES

Authors
  1. Boyd, J.E.
Corporate Authors
Defence Research Establishment Pacific, Victoria BC (CAN)
Abstract
Inspection of an aircraft with film radiography can be time-consuming and a waste of valuable human resources. Filmless real-time radiography provides one method of streamlining the inspection process, and allows the implementation of automated inspection methods. This report presents a method for automatically inspecting honeycomb sandwich panels for certain types of damage. The hexagonal grid discontinuity (HGD) inspection method exploits the regularity of the grid of a honeycomb in order to locate irregularities and possible damage. Teflon inserts, which simulate disbonds, and entrapped water are successfully detected by the HGD method while undamaged honeycomb does not cause false alarms in the detection system. The method is suitable for use with a real-time video X-ray inspection system.
Report Number
DREP-TM-89-9 — Technical Memorandum
Date of publication
15 May 1989
Number of Pages
37
DSTKIM No
90-04753
CANDIS No
66985
Format(s):
Hardcopy;Originator's fiche received by DSIS

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