Analysis of notched metal matrix composites under tension loading
Presented are techniques based on 3-D finite-element analysis for the examination of continuous fiber reinforced metal matrix composites. Examples are shown for specific metal matrix composites such as boron/aluminum and silicon carbide/aluminum. Specimen stress-strain behavior and stress at first fiber failure were predicted for boron/aluminum laminates containing circular holes and crack-like slits. The predictions compared very well for (+ or - 45) sub 2s laminates. Mesh configuration was shown to have an effect on the calculation of stresses local to the notch. The presence of thin interface layers of matrix material had a significant influence on the slit-tip stress state, causing sharper stress gradients near the notch. Interface layers reduced the slit-tip fibers stresses in a (+ or - 45) sub s silicon-carbide/aluminum laminate but increased them in a (0/90) sub s laminate.
- Research Organization:
- National Aeronautics and Space Administration, Hampton, VA (USA). Langley Research Center
- OSTI ID:
- 6749085
- Report Number(s):
- N-88-24713; NASA-TM-100629; NAS-1.15:100629
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
COMPOSITE MATERIALS
STRESS ANALYSIS
TENSILE PROPERTIES
MATRIX MATERIALS
ALUMINIUM
BORON
FIBERS
FINITE ELEMENT METHOD
NUMERICAL ANALYSIS
SILICON CARBIDES
CARBIDES
CARBON COMPOUNDS
ELEMENTS
MATERIALS
MATHEMATICS
MECHANICAL PROPERTIES
METALS
NUMERICAL SOLUTION
SEMIMETALS
SILICON COMPOUNDS
360603* - Materials- Properties