Basic role of the fiber/matrix interface on the fatigue performance of unidirectional fiberglass-reinforced composites

Thesis/Dissertation · Mon Dec 31 23:00:00 EST 1984

OSTI ID:5032415

Shih, C

The goal of this study was that of determining the fiber/matrix interface in affecting the static bending and flexural fatigue performance of oriented fiber composites, and of evaluating the performance of silicon phthalocyanine coupling agents. Untreated, commercial silane treated, and silicon phthalocyanine agent treated fiberglass composites, as well as boiling-water degraded composites, were used to get different fiber/matrix interface conditions. The dry flexural strength of all composites was about the same. The flexural strength and the fractography of N-(2-aminoethyl)-3-aminopropyl-trimethoxysilane treated composites essentially remained the same after the hydrothermal treatment. Silicon phthalocyanine agent treated composites had a marginally high wet flexural strength retention as compared with that of the composites without coupling agent. When the interface degraded, the failure modes in a four-point bending (flexural) test changed from tensile flexural failure to compressive flexural failure, then to the shear failure mode.

• Research Organization: Case Western Reserve Univ., Cleveland, OH (USA)
• OSTI ID: 5032415
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360303* -- Composite Materials-- Mechanical Properties-- (-1987)
BENDING
COMPOSITE MATERIALS
DATA
EXPERIMENTAL DATA
FATIGUE
FIBERGLASS
FIBERS
FLEXURAL STRENGTH
INFORMATION
INTERFACES
MATERIALS
MATRIX MATERIALS
MECHANICAL PROPERTIES
NUMERICAL DATA
REINFORCED MATERIALS