Accession Number : AD0757213

Title :   Fatigue of Boron-Aluminum Composites.

Descriptive Note : Technical rept. 1 Apr 71-31 Mar 72,

Corporate Author : MIDWEST RESEARCH INST KANSAS CITY MO

Personal Author(s) : Hancock,J. R.

Report Date : NOV 1972

Pagination or Media Count : 33

Abstract : The mechanisms of fatigue failure in composites of boron-6061 aluminum under oscillating tensile loads were determined and a phenomenological model of fatigue failure is outlined. A linear relationship between fatigue limit and filament content is suggested as an interim criterion for the specification of minimum acceptable composite fatigue properties and for use in the design of structures. Unidirectional filament reinforcement was less effective under cyclic loads then under static loads, and the low-cycle resistance of the composites was sharply reduced when SiC-coated filaments were used as the reinforcements. (Author Modified Abstract)

Descriptors :   (*COMPOSITE MATERIALS, FATIGUE(MECHANICS)), (*ALUMINUM ALLOYS, COMPOSITE MATERIALS), BORON, REINFORCING MATERIALS, SILICON CARBIDES, REFRACTORY COATINGS, FILAMENTS, CRACK PROPAGATION, INTERFACES

Subject Categories : Laminates and Composite Materials

Distribution Statement : APPROVED FOR PUBLIC RELEASE