Accession Number:

AD0676863

Title:

THE FRACTURE ENERGY OF COMPOSITE MATERIALS

Descriptive Note:

Final rept. 1 Sep 1967-31 Aug 1968

Corporate Author:

VERMONT UNIV BURLINGTON

Report Date:

1968-09-30

Pagination or Media Count:

37.0

Abstract:

A study of the sources of the fracture energy and hence the brittleness of laminates shows that one of the parameters governing the usefulness of a filament as a reinforcement for a matrix is the debonding energy in shear between the filament and the matrix. A novel method of measuring this value is described. Using this technique, values are determined for freshly drawn Pyrex rods with many different surface treatments embedded in anhydride cured epoxy resin. The effects of environment are shown and it is noted that all debonding energies tend to be substantially the same value after long exposure.

Subject Categories:

  • Laminates and Composite Materials
  • Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE