Composite Materials - Influence of Fiber Orientation and Concentration
3 important questions on Composite Materials - Influence of Fiber Orientation and Concentration
What is the difference in alignment between continuous and discontinuous fibers?
Continuous fibers are mostly aligned. Discontinuous fibers can be aligned or random.
How is the longitudinal tensile strength calculated for discontinuous aligned composites with a fiber length l < lc?
Where:
σcd'* is the longitudinal strength
d is the diameter of the fiber
τc is either the fiber-matrix bond strength or the matrix shear yield strength. Which ever is smaller.
σm' is the stress in the matrix upon fracture of the fiber
What is the rule-of-mixture for the elastic modulus in discontinuous and random oriented-fiber composites?
Where:
K is a fiber efficiency parameter that depends on Vf and
ratio
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