Accession Number : ADA301343

Title :   Potential Release of Fibers from Burning Carbon Composites.

Descriptive Note : Technical memo.,

Corporate Author : NATIONAL AERONAUTICS AND SPACE ADMINISTRATION HAMPTON VA LANGLEY RESEARCH CEN TER

Personal Author(s) : Bell, Vernon L.

PDF Url : ADA301343

Report Date : JUL 1980

Pagination or Media Count : 52

Abstract : A comprehensive experimental carbon fiber source program was conducted to determine the potential for the release of conductive carbon fibers from burning composites. Laboratory testing determined the relative importance of several parameters influencing the amounts of single fibers released, while large scale aviation jet fuel pool fires provided realistic confirmation of the laboratory data. The dimensions and size distributions of fire-released carbon fibers were determined, not only for those of concern in an electrical sense, but also for those of potential interest from a health and environmental standpoint. Fire plume and chemistry studies were performed with large pool fires to provide an experimental input into an analytical modelling of simulated aircraft crash fires. A study of a high voltage spark system resulted in a promising device for the detection, counting, and sizing of electrically conductive fibers, for both active and passive modes of operation.

Descriptors :   *COMPOSITE MATERIALS, *CARBON FIBERS, *COMBUSTION, INPUT, SIMULATION, EXPERIMENTAL DATA, LABORATORY TESTS, DETECTION, PASSIVE SYSTEMS, ELECTRICAL CONDUCTIVITY, CHEMISTRY, OPERATION, RELEASE, SPARKS, FIRES, PLUMES, AIRCRAFT FIRES, MENTAL ABILITY, HIGH VOLTAGE, CRASHES, COMBUSTION PRODUCTS.

Subject Categories : Refractory Fibers
      Laminates and Composite Materials
      Electricity and Magnetism
      Combustion and Ignition

Distribution Statement : APPROVED FOR PUBLIC RELEASE