Accession Number : ADD005090

Title :   Composite Structures and Method of Detecting Mechanical Damage Thereto.

Descriptive Note : Patent Applications,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON D C

Personal Author(s) : Crane,Robert L

Report Date : 24 May 1978

Pagination or Media Count : 14

Abstract : A composite structure is fabricated from fiber-reinforced tape, segments of the tape being stacked one upon another so as to form a plurality of plies. A boron fiber is positioned adjacent to or along an edge of each of the tape segments. Because of the X-ray opacity of the boron fiber's tungsten boride core and because the boron fiber will break when a ply is damaged, damage to the composite structure can be detected by radiographic examination. (Author)

Descriptors :   *Patent applications, *Fiber reinforced composites, *Tapes, Stacking, Defects(Materials), Nondestructive testing, Boron, Edges, Tungsten compounds, Carbides, Opacity, Radiography

Subject Categories : Laminates and Composite Materials
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE