Accession Number:

ADA056779

Title:

Prediction of the Transverse Strength of Graphite/Aluminum Composites

Descriptive Note:

Final rept.

Corporate Author:

ARMY MATERIALS AND MECHANICS RESEARCH CENTER WATERTOWN MA

Personal Author(s):

• Riggs, Dennis

Report Date:

1978-05-01

Pagination or Media Count:

18.0

Abstract:

The theoretical transverse tensile strength of graphitealuminum composites was calculated using an elastic analysis technique. It was found that the theoretical behavior of the composite is quite similar to that of a multi- holed flat plate loaded in the transverse direction. Large stress concentrations build up at the fiber-matrix interface resulting in failure at low levels of applied stress. The applied failure stress decreases markedly as the volume fraction of fibers increases. It was concluded that the transverse strength for a 35 volume percent graphitealuminum composite would probably not exceed 10 ksi unless interleaving was used, for example mainly because the transverse properties of the reinforcing fibers are inherently poor and the fiber-matrix bond is very weak.

Descriptors:

• *ALUMINUM
• *FIBER REINFORCED COMPOSITES
• *GRAPHITE
• *TENSILE STRENGTH
• CARBON FIBERS
• MATHEMATICAL MODELS
• ORIENTATION(DIRECTION)
• STRESS CONCENTRATION
• STRESSES
• TRANSVERSE

Subject Categories:

• Laminates and Composite Materials
• Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE