Accession Number : ADA326135

Title :   Real-Time X-Ray Inspection of Composite Aircraft Structures.

Descriptive Note : Final rept.,

Corporate Author : SCIENCE APPLICATIONS INC LA JOLLA CA

Personal Author(s) : Patricelli, F. ; Baltgalvis, J. ; Polichr, R. ; Orphan, V. J.

PDF Url : ADA326135

Report Date : DEC 1978

Pagination or Media Count : 74

Abstract : Composite aircraft structures were inspected to determine the feasibility of utilizing Real Time Radiography (RTR) for detection of defects, damage, and repair verification. The program included inspection of composite aircraft structural samples in the laboratory and an on site demonstration of RTR at the Naval Air Rework Facility (NARF), Norfolk of actual composite aircraft structures. These advantages, along with the substantial savings in film costs, will greatly facilitate inspection and extend maintenance capability at all levels. The second part of the program consisted of developing a penetrant injection system that when coupled with RTR would greatly facilitate assessment of composite damage for delaminations and debonds. A prototype system was fabricated and inspections were performed on graphite/epoxy and boron/epoxy structural samples to determine the feasibility of the technique. The major conclusions of this part of the report are that, for penetrant injection inspections with 20% aqueous lead acetate solution, RTR will detect: (1) 2 mils of solution in a test panel; and (2) The extent of debonds and delaminations in the composite samples. Since the initial feasibility of a penetrant injection system has been demonstrated, SAI is proposing an additional study to develop a portable penetrant injection system that could be used at the 1 and 0 levels for assessment of impact damage for delaminations and debonds.

Descriptors :   *COMPOSITE STRUCTURES, *REPAIR, *INSPECTION, *RADIOGRAPHY, *COMPOSITE AIRCRAFT, MAINTENANCE, DAMAGE, NONDESTRUCTIVE TESTING, REAL TIME, LAMINATES, FILMS, X RAYS, PENETRATION, BORON, GRAPHITE EPOXY COMPOSITES, DEFECT ANALYSIS.

Subject Categories : Aircraft
      Laminates and Composite Materials
      Nuclear Physics & Elementary Particle Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE