S-3A Graphite/Epoxy Spoiler Development Program. Volume II.
Abstract
After testing of the S-3A Graphite/Epoxy Spoilers was satisfactorily completed, under Contract N62269-73-C-0610, the contracted effort was extended to include the development of NDI standards for the composite spoiler to be included in Volume II. In addition to the fabrication of reference standards for this report, the development of field inspection techniques was pursued using the ultrasonic unit available to Navy inspection personnel. The initial phase of developing NDI standards for the composite spoiler was accomplished through the fabrication and evaluation of eleven experimental Quality Control Defect Specimens (QCDS). These preliminary reference panels were built to investigate the best material for producing built-in defects, the minimum detectable defect size, the influence of varying the number of skin plys, the influence on attenuation properties of the amount of resin in honeycomb cells, and the influence on attenuation and physical properties of the amount of bleeder material used. The final standards were designed utilizing the information gained from the preliminary reference panels. These standards were fabricated in triplicate with two panels to be furnished to the Navy for field use and one panel to be retained by VSD for use in future production inspection. All reference panels were characterized by radiography, ultrasonic through transmission (immersion and contact) and ultrasonic pulse-echo methods.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1975
- Accession Number
- ADA031066
Entities
People
- E. G. Blosser
- O. E. Dhonau
- S. A. Mcgovern
Organizations
- Vought