Interfacial shear stress distribution in model composites. I - A Kevlar 49 fibre in an epoxy matrix

Journal Article · Wed May 01 04:00:00 EDT 1991 · Journal of Composite Materials; (United States)

OSTI ID:5276965

Jahankhani, H; Galiotis, C ^[1]

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1. Queen Mary and Westfield College, London (England)

The technique of Laser Raman Spectroscopy has been applied in the study of aramid fibers, such as Kevlar 49, and aramid/epoxy interfaces. A linear relationship has been found between Raman frequencies and strain upon loading a single Kevlar 49 filament in air. Model composites of single Kevlar 49 fibers embedded in epoxy resins have been fabricated and subjected to various degrees of mechanical deformation. The transfer lengths for reinforcement have been measured at various levels of applied tensile load and the dependence of transfer length upon applied matrix strain has been established. Finally, by balancing the tensile and the shear forces acting along the interface, the interfacial shear stress (ISS) distribution along the embedded fiber was obtained. 52 refs.

• OSTI ID: 5276965
• Journal Information: Journal of Composite Materials; (United States), Journal Name: Journal of Composite Materials; (United States) Vol. 25; ISSN JCOMB; ISSN 0021-9983
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
AIR
ARAMIDS
COMPOSITE MATERIALS
DEFORMATION
EPOXIDES
FIBERS
FLUIDS
GASES
INTERFACES
LASER SPECTROSCOPY
MATERIALS
MECHANICAL PROPERTIES
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
PETROCHEMICALS
PETROLEUM PRODUCTS
PLASTICS
RAMAN SPECTROSCOPY
SHEAR PROPERTIES
SPECTROSCOPY
STRAINS
STRESS ANALYSIS
SYNTHETIC MATERIALS
TENSILE PROPERTIES