Micromechanical modelling of the transverse tensile ductility of unidirectional silicon carbide/6061 aluminum

Journal Article · Tue Dec 31 23:00:00 EST 1991 · Journal of Composites Technology and Research; (United States)

OSTI ID:6978097

Wisnom, M R ^[1]

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1. Bristol, University (United Kingdom)

Finite element micromechanical modeling of unidirectional silicon carbide/6061 aluminum has been conducted to investigate ways to improve the transverse tensile strain to failure. The analysis included the effects of nonlinear matrix behavior, interface debonding, residual stresses as a result of manufacturing, and subsequent stress relaxation. The influence of heat treatment, fiber-packing geometry, and volume fraction have been analyzed. The most important factor affecting transverse tensile ductility is the relationship between the stress at which the matrix yields and the interface strength. Highest ductility is obtained when significant plasticity occurs before interface debonding; this can be achieved by annealing the composite and arranging the fibers to be in thin plies, spaced apart as far as possible to reduce the stress concentration factor at the interface. 13 refs.

• OSTI ID: 6978097
• Journal Information: Journal of Composites Technology and Research; (United States), Journal Name: Journal of Composites Technology and Research; (United States) Vol. 14:2; ISSN 0885-6804; ISSN JCTRE
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
ALLOYS
ALUMINIUM ALLOYS
ALUMINIUM BASE ALLOYS
ANNEALING
CARBIDES
CARBON COMPOUNDS
COMPOSITE MATERIALS
DEFORMATION
DUCTILITY
FIBERS
FINITE ELEMENT METHOD
HEAT TREATMENTS
INTERFACES
LAYERS
MATERIALS
MATHEMATICAL MODELS
MATRIX MATERIALS
MECHANICAL PROPERTIES
NUMERICAL SOLUTION
OPTIMIZATION
ORIENTATION
REINFORCED MATERIALS
RELAXATION
RESIDUAL STRESSES
SILICON CARBIDES
SILICON COMPOUNDS
STRAINS
STRESS RELAXATION
STRESSES
TENSILE PROPERTIES