Accession Number:

ADA067965

Title:

Fracture Mechanisms in Fibrous Composites.

Descriptive Note:

Interim rept. 1 Aug 78-31 Jan 79,

Corporate Author:

CAMBRIDGE UNIV (ENGLAND) DEPT OF ENGINEERING

Personal Author(s):

• Beaumont,Peter W. R.

Report Date:

1979-01-31

Pagination or Media Count:

40.0

Abstract:

This interim report summarizes the progress made in the period 1 Aug 78 - 31 Jan 79, under grant AFOSR 78-3644 entitled Fracture Mechanisms in Fibrous Composites. It describes microscopic observations of the debonding, fracture and pull-out of glass fibers and carbon fibers in an epoxy resin includes a fractographic analysis of glass fibers and carbon fibers in epoxy resin and an analysis of work of fracture toughness in terms of fiber-matrix sliding processes and the dissipation of energy when a debonded fiber snaps. All experimental data was collected under ambient conditions. The approach has been to use models with experimental values for those parameters adequately measurable and to make simple assumptions about the unmeasurable parameters. This approach uses the most that a model-based theory has to offer and provides a reasonable description of experimental data. Author

Descriptors:

• *FIBER REINFORCED COMPOSITES
• *CARBON FIBERS
• *FRACTURE(MECHANICS)
• *GLASS FIBERS
• EXPERIMENTAL DATA
• DEGRADATION
• ENERGY
• DISSIPATION
• MATRIX MATERIALS
• FRACTOGRAPHY
• BONDING
• STATISTICAL ANALYSIS
• FAILURE(MECHANICS)
• EPOXY RESINS
• UNITED KINGDOM

Subject Categories:

• Laminates and Composite Materials
• Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE