Fatigue resistance criteria for fiber-reinforced composite structures. Final report, 1 Apr 1971-30 Sep 1974

Technical Report · Tue Oct 01 00:00:00 EDT 1974

OSTI ID:4035028

Dvorak, G J

The research effort was concentrated on metal matrix composites, such as the Al--B, Al--Be, Cu--W, and similar systems. It was found that in as- fabricated composites with soft matrices fatigue failure can be prevented if the composite shakes down during cyclic loading. The fatigue strength of heat- treated composites is affected by residual microstresses, but failure can be prevented if the total microstresses are kept within the respective fatigue limits (at 10 to the 7th power cycles) of the constituents. These criteria for prevention of fatigue failure in metal matrix composite systems were verified by extensive comparisons of theoretical predictions with available experimental results. (GRA)

• Research Organization: Duke Univ., Durham, N.C. (USA). Dept. of Civil Engineering
• NSA Number: NSA-33-030119
• OSTI ID: 4035028
• Report Number(s): AD/A-009789
• Resource Relation: Other Information: Orig. Receipt Date: 30-JUN-76
• Country of Publication: United States
• Language: English

Related Subjects

N50230* -Metals
Ceramics
& Other Materials-Metals & Alloys-Properties
Structure & Phase Studies
360103* -Materials-Metals & Alloys-Mechanical Properties
*COMPOSITE MATERIALS- FATIGUE
ALUMINIUM ALLOYS
BERYLLIUM ALLOYS
BORON ALLOYS
COPPER ALLOYS
PLASTICITY
RESIDUAL STRESSES
TENSILE PROPERTIES
TUNGSTEN ALLOYS