Accession Number:

ADA305565

Title:

Composite Impact Strength Improvement through a Fiber/Matrix Interphase.

Descriptive Note:

Final rept.,

Corporate Author:

TRW EQUIPMENT GROUP CLEVELAND OH

Personal Author(s):

Report Date:

1975-10-01

Pagination or Media Count:

105.0

Abstract:

The objective of the program was to improve the impact strength and toughness of fiberresin composites by means of a fiber coating interphase. Graphite fiberepoxy resin composites were fabricated with four different fiber coating systems introduced in a matrix-fiber interphase. Two graphite fibers, a high strength and a high modulus type, were studied with the following coating systems chemical vapor deposited boron, electroless nickel, a polyamide-imide resin and a thermoplastic polysulfone resin. Evaluation methods included the following tests Izod, flexure, shear fracture toughness, longitudinal and transverse tensile, and transverse and longitudinal compression. No desirable changes could be effected with the high strength fiber, but significant improvements in impact performance were observed with the polyamide-imide resin coated high modulus fiber with no loss in composite modulus. AN

Subject Categories:

  • Laminates and Composite Materials
  • Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE