Product acceptance testing for composite aerospace structures is a key area of concern in the industry. Unlike metals, the methods to determine the quality and structural integrity of finished composite parts are not fully developed or standardized in terms of defects correlation and effect of defects on mechanical, physical, and thermal properties. Depending on the complexity and application, inspection cost for a composite aerospace structure could be as high as 35 to 40 percent of the total cost of the part. This paper discusses typical defects found in fiber-reinforced composites and their effect on composite properties. Sources of defects and how these defects can be minimized are presented. Product acceptance test methods discussed include NDE techniques, tag ends, process verification panel and proof testing. The capability of various NDE techniques (radiography, computer tomography, ultrasonics, acoustic emission, acousto-ultrasonics, thermography, optical holography, eddy current etc.) to detect defects, and the problems of accurate defect assessment in composites are also discussed. Use of tag end testing to optimize the materials, processing, and design, as well as areas of concern in using various product acceptance methods are also presented. Finally, recommendations are made for minimizing sources of errors and testing problems.
Product acceptance testing for filament wound composite rocket motor components
Produktakzeptanzpruefung fuer Raketenmotorteile aus bandgewickeltem Verbundwerkstoff
Advanced Composites. Conf. Proc., American Soc. for Metals ; Dez ; 309-321
1985
13 Seiten, 8 Bilder, 2 Tabellen, 29 Quellen
Conference paper
English
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