Accession Number : ADA306023

Title :   The Potential for Damage from the Accidental Release of Conductive Carbon Fibers from Aircraft 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 : ADA306023

Report Date : APR 1980

Pagination or Media Count : 24

Abstract : Carbon and graphite fibers are known to be electrically conductive. That property has resulted in damage to electrical equipment from the inadvertent release of virgin fibers into the atmosphere. The rapidly accelerating use of carbon fibers as the reinforcement in filamentary composite materials brought up the possibility of accidental release of carbon fibers from the burning of crashed commercial airliners with carbon composite parts. Such release could conceivably cause widespread damage to electrical and electronic equipment. This paper presents the experimental and analytical results of a comprehensive investigation by the National Aeronautics and Space Administration of the various elements necessary to assess the extent of such potential damage in terms of annual expected costs and maximum losses at low probabilities of occurrence. A review of a NASA materials research program to provide alternate or modified composite materials to over- come any electrical hazards from the use of carbon composites in aircraft structures is described. (AN)

Descriptors :   *FIBER REINFORCED COMPOSITES, *CARBON FIBERS, *FLAMMABILITY, RISK, COST ANALYSIS, DAMAGE ASSESSMENT, PROBABILITY, VULNERABILITY, ELECTRICAL CONDUCTIVITY, AVIATION ACCIDENTS, CIVIL AVIATION, AIRCRAFT EQUIPMENT, COMBUSTION STABILITY, BURNING RATE, TRANSPORT AIRCRAFT, AIRCRAFT FIRES, ELECTRICAL EQUIPMENT, GRAPHITE EPOXY COMPOSITES, ELECTRICAL LOADS, CRASHWORTHINESS, FIRE HAZARDS.

Subject Categories : Laminates and Composite Materials
      Combustion and Ignition
      Transport Aircraft

Distribution Statement : APPROVED FOR PUBLIC RELEASE