Published: Jul 1963
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With the advent of the filament-wound glass fiber — resin pressure vessel, a material unlike any encountered previously was brought into the field. Metals and plastics having anisotropic structures have been commonplace, to be sure, but a two-phase system consisting of fibers of high tensile strnegth embedded in a matrix of softer plastic was a new situation. The old testing problems, such as physical property testing, thickness gaging, defect detection, and so on, were still present, but a host of new structural parameters requiring nondestructive examination were found to exist. In many instances the “tried-and-proven” non destructive test methods were ineffective for extracting needed structural information. A fortuitous exception to this was radiography, without which the entire glass fiber rocket motor case program would have been retarded.
Dane Harvey, E.
Staff Physicist, Allegany Ballistics Laboratory, Cumberland, Md
Paper ID: STP44514S