Accession Number:

ADA076497

Title:

Defect-Property Relationships in Composite Materials. Part IV.

Descriptive Note:

Final rept. 7 Feb 77-6 Feb 79,

Corporate Author:

VIRGINIA POLYTECHNIC INST AND STATE UNIV BLACKSBURG

Personal Author(s):

• Reifsnider ,K. L.
• Henneke,E. G. , II
• Stinchcomb,W. W.

Report Date:

1979-06-01

Pagination or Media Count:

146.0

Abstract:

This report describes the results of an investigation of the nature of damage in two graphite-epoxy laminates under various loading histories, with special attention to the changes in mechanical properties caused by specific damage mechanisms. The results include several new findings, the development of unique investigative methods and some substantial deviations from common model predictions. The discovery of a characteristic damage state is reported. Author

Descriptors:

• *COMPOSITE MATERIALS
• *DEFECTS(MATERIALS)
• MECHANICAL PROPERTIES
• DAMAGE
• MODELS
• LAMINATES
• LOADS(FORCES)
• COMPARISON
• GRAPHITE
• FATIGUE(MECHANICS)
• EPOXY RESINS
• STATIC TESTS

Subject Categories:

• Laminates and Composite Materials
• Plastics
• Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE