Accession Number:

ADA065086

Title:

Environmental Durability of Fiber Reinforced Composites

Descriptive Note:

Final rept. 1 Dec 1976-30 Nov 1978

Corporate Author:

ROCKWELL INTERNATIONAL CORP THOUSAND OAKS CA SCIENCE CENTER

Personal Author(s):

Report Date:

1978-11-30

Pagination or Media Count:

17.0

Abstract:

An investigation has been completed which determines the physiochemical mechanisms of environmental durability and degradation of graphite-epoxy Thornel T300 in 5208 epoxy and fiber glass-epoxy S-2 glass in 5208 epoxy under hydro-thermal high moisture and temperature exposure. Surface energy and moisture diffusion analysis provide nondestructive test methods which detect irreversible degradatiion of the fiber-matrix interface. Dynamic mechanical damping detects reversible volumetric plasticization effect on modulus, and the interlaminar shear strength and transfibrous fracture energy distributions. A composite durability characterization program is demonstrated which effectively combines preventative nondestructive evaluation PNDE with environmental failure and micromechanics analysis of composite structural reliability.

Subject Categories:

  • Refractory Fibers
  • Laminates and Composite Materials
  • Plastics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE