Accession Number:

ADA024716

Title:

The Relationships of Structure to Properties in Graphite Fibers. Part III.

Descriptive Note:

Technical rept.,

Corporate Author:

RENSSELAER POLYTECHNIC INST TROY N Y DEPT OF MATERIALS ENGINEERING

Report Date:

1975-11-01

Pagination or Media Count:

143.0

Abstract:

Three-dimensional structural characterization of a variety of carbon fibers has been completed following determination of the axial and radial structures in the fibers studied. In addition the relation of fiber strength to three-dimensional structure has been developed. Fibers tend to fail in three separate ways depending on their moduli failure mode changes from brittle fracture to fibril decoupling to plastic deformation as modulus increases. Strength in Orlon and Rayon base fibers follows the Griffith relation. Strength in Orlon and Courtelle base fibers above the maxima in the strength-modulus curve is controlled by flaws resulting from cool-down residual stresses as well as surface crystallization.

Subject Categories:

  • Refractory Fibers
  • Laminates and Composite Materials

Distribution Statement:

APPROVED FOR PUBLIC RELEASE